Brain aging does not begin with the first memory lapses. Long before the onset of symptoms that worry families and mobilize doctors, the brain undergoes insidious changes: a gradual decrease in cerebral blood flow, impaired vascular function, increased inflammation, and a slowing energy metabolism. According to recent literature, these silent disturbances are one of the first links in the chain of cognitive decline and the progression of neurodegenerative diseases such as Alzheimer’s disease and related dementias. According to recent literature, these silent disturbances are one of the first links in the chain of cognitive decline and the progression of neurodegenerative diseases such as Alzheimer’s disease and related dementias. They precede the deterioration of brain structures or amyloid deposits visible on imaging by several years, sometimes more than a decade.

Physical activity is often presented as one of the few effective and accessible interventions that can truly modify risk factors and preserve brain health. Most of the research conducted over the past two decades has focused on aerobic exercise. Its benefits are well documented: increased cerebral blood flow, improved metabolism, reduction in systemic inflammation (read our article on the link between brain health and adiposity), and slowing of age-related atrophy ( read our article on the link between endurance and gray matter). However, this focus on cardiovascular endurance somewhat overshadows the role of muscle strengthening in preventing these health problems.

Yet strength training is experiencing spectacular growth, particularly among older people, for whom it is recommended to combat sarcopenia, improve mobility, prevent osteoporosis (https://sci-sport.com/effet-de-differents-types-exercices-sur-la-densite-minerale-osseuse-chez-les-femmes-menopausees-256/), and reduce the risk of falls. Despite these well-established benefits, its potential impact on the brain has been less studied, and this practice is often less prescribed. However, a growing body of evidence points to a simple idea: muscle strength is not only a marker of physical health, but also a major determinant of brain health. A literature review conducted by researchers at McMaster University in Canada brings together the available evidence on the effects of muscle strengthening, whether through a single session or chronic training, on the biological, vascular, and cognitive mechanisms involved in brain aging. It also highlights areas of concern, current data limitations, and future research needs.

1. The mechanisms of cognitive decline: what we need to understand

To understand how muscle strengthening can influence brain health, we must first look at the mechanisms that trigger (or accelerate) cognitive decline with age. Contrary to a still widespread perception, neurodegenerative diseases do not begin in the neuron itself. They emerge from a multifactorial and heterogeneous ecosystem involving energy metabolism, cerebral perfusion, vascular function, blood-brain barrier integrity, and/or inflammatory balance. It is the progressive alteration of one or more of these factors that weakens the brain.

Brain metabolism

The brain functions almost exclusively on glucose, which it consumes in massive quantities relative to its size. During normal aging, the ability of mitochondria to produce ATP decreases, while antioxidant defenses weaken. These changes are amplified in people with neurodegenerative diseases. Oxidative stress sets in and maintains a vicious cycle: it alters glucose transporters, disrupts insulin signaling, and further reduces the brain’s ability to produce energy. In the early stages of dementia, these metabolic disturbances appear well before memory loss.

Cerebral perfusion

A brain that consumes a lot of energy needs a stable and adaptable blood supply. However, numerous data show that a decrease in cerebral blood flow precedes the structural and functional deficits associated with neurodegenerative diseases, and is therefore one of the earliest markers of Alzheimer’s disease risk. The regions most affected in the early stages (i.e., the hippocampus, parietal cortex, and cingulate cortex) are also those that determine the profile of cognitive decline in subsequent years. This hypoperfusion is not just a consequence of the disease: it contributes directly to metabolic alterations, amyloid accumulation, and progressive neuron loss.

Systemic and cerebral vascular function

Although it is not yet clear whether reduced cerebral blood flow or reduced cerebral metabolism occurs first in the development of dementia, the deterioration of vascular function, both systemic and cerebral, also plays a central role. With age, arteries become stiffer. The walls lose elasticity, the endothelium becomes less efficient, and the availability of nitric oxide decreases. This stiffness increases the pressure pulsation transmitted to the cerebral microvessels, causing structural damage that aggravates hypoperfusion. Data show that arterial stiffness in midlife is predictive of smaller hippocampal volumes and an increased burden of white matter lesions several years later.

Cerebral vascular function

Optimal functioning of the cerebral arteries is essential for supplying the brain with blood according to its needs. With age, and even more so in the case of dementia, a decrease in cerebral blood flow, an increase in vascular resistance, and a significant alteration in the reactivity of vessels to stimuli such as CO₂ are observed. Neurovascular coupling (the brain’s ability to locally increase blood flow when a neural network is activated) also deteriorates. These deficits, linked to endothelial dysfunction or chronic overactivation of the sympathetic nervous system, which are common in cardiovascular disease and diabetes, appear early in the neurodegenerative cascade and are closely correlated with the severity of cognitive decline.

The blood-brain barrier

The blood-brain barrier is a key element of neuroprotection, responsible for controlling the entry and exit of substances into and out of brain tissue. Weakened by oxidative stress, inflammation, or mechanical stress, it becomes more permeable, allowing cytokines and immune cells to enter while reducing the removal of waste products and toxic proteins such as amyloid. The Hippocampus is particularly vulnerable to these alterations, which are accentuated in neurodegenerative diseases. Dysfunction of this barrier appears relatively early, before the deposition of amyloid and tau and before structural changes, and contributes to a vicious cycle in which the accumulation of these proteins further damages the barrier, further aggravating its own dysfunction.

2. Why muscle strength matters for the brain

When we think about brain aging, muscle strength is not the first thing that comes to mind. However, recent research shows that it is one of the best predictors of cognitive decline, along with certain biological or vascular markers. In other words, loss of strength is not just a symptom of aging: it actively contributes to the deterioration of the mechanisms that protect the brain.

Sarcopenia, which includes loss of muscle mass, strength, and function, is accompanied by increased systemic inflammation and oxidative stress. These disturbances do not stop at the muscle level. They fuel the same metabolic and inflammatory circuits involved in cognitive decline. A sedentary, less muscular body generates more pro-inflammatory cytokines and has less capacity to buffer metabolic stress. Over time, this drift promotes a less resilient vascular and cerebral environment. The data also show a notable difference between the sexes: women, despite having a longer life expectancy, have a higher prevalence of sarcopenia in old age, which could contribute to the fact that they account for about two-thirds of neurodegenerative disease diagnoses.

Beyond inflammation, strength training influences other essential processes, such as sleep, which plays a key role in the nighttime removal of brain waste by the glymphatic system. Better sleep quality, characterized in particular by a higher proportion of deep sleep, increases the clearance of amyloid and tau proteins. Several studies show that weight training improves and stabilizes deep sleep phases, reducing the time it takes to fall asleep and increasing the overall quality of rest. Thus, weight training may act indirectly by strengthening one of the most powerful natural neuroprotection systems.

One of the most unique aspects of strength training is its particular hemodynamic stress. Unlike aerobic exercise, strength training imposes rapid and cyclical variations in blood pressure on the vascular system. Each repetition alternates between a high-pressure phase (contraction) and a transient drop phase (relaxation). In the long term, these oscillations could strengthen the brain’s ability to manage perfusion fluctuations, improving its tolerance to sudden increases and decreases in pressure, a characteristic that is greatly impaired in the early stages of cognitive decline. Initial data suggest that individuals who train in strength training have better regulation of cerebral perfusion during hemodynamic challenges.

Finally, weight training does not only engage the muscles: it also mobilizes the brain. The fine motor control, coordination, technical learning, movement planning, and concentration required to perform complex exercises represent a real cognitive stimulus. Through neuromuscular synchronization, breath management, and monitoring of load or repetitions, the brain must constantly adapt, learn, and adjust motor patterns. This well-documented process stimulates neuroplasticity and may contribute to the cognitive gains observed in several studies.

Thus, muscle strength is not simply an indicator of physical fitness. It reflects a profound interaction between metabolism, inflammation, vascular function, motor behavior, and sleep, all of which are variables that contribute to brain health. From this perspective, strength training appears not only as a strategy for preserving mobility and independence, but also as a potential tool for preventing brain aging.

3. Effects of muscle strengthening on biological markers in the brain

Strength training can influence brain aging because it acts directly on a set of biological markers at the heart of neurodegeneration. These markers of inflammation and oxidative stress, the accumulation of amyloid and tau proteins, and neurotrophins constitute the underlying biology of diseases such as Alzheimer’s. And strength training, even when practiced in small doses, can modulate these processes.

Inflammation and oxidative stress: a major initial lever

In animal models as in humans, regular muscle strengthening reduces oxidative stress levels and improves antioxidant defenses. This may seem paradoxical because a weight training session immediately increases the production of free radicals. But it is precisely this transient increase that triggers, in the long term, improved ability to neutralize oxidative stress. This hormesis (a more effective response by the system after controlled stress) is one of the best-documented mechanisms.

In rodents, models of Alzheimer’s disease, a few weeks of resistance training are enough to reduce lipid peroxidation, increase glutathione, and rebalance antioxidant cascades. In older humans, several studies report a decrease in oxidation markers and improved DNA stability after a few months of training. Inflammation follows a similar pattern: muscle strengthening reduces baseline levels of IL-6, TNF-α, and IL-1β, cytokines that are heavily involved in brain aging and the progression to dementia.

Amyloid and tau: preliminary but promising data

In Alzheimer’s research, most interventions are evaluated through a very clear lens: their impact on amyloid and tau proteins. In this area, strength training is not yet supported by large human studies. However, animal data is consistent and strong. Several studies show that resistance training significantly reduces amyloid load in the hippocampus and frontal cortex, increases protective microglial density, and attenuates the accumulation of hyperphosphorylated tau.

A central hypothesis suggests that weight training improves the integrity of the blood-brain barrier, thereby facilitating the removal of amyloid to the peripheral circulation. This mechanism is particularly interesting because it would position strength training not only as a metabolic or muscular intervention, but as a tool capable of acting on the very dynamics of toxic protein accumulation.

BDNF, IGF-1, and brain plasticity: mediators of neuronal resilience

Neurotrophins, mainly BDNF and IGF-1, represent the direct link between physical exercise and neuroplasticity. They promote synaptic growth, neuronal survival, neurogenesis, and play a key role in memory. Weight training induces a very clear increase in BDNF after a single session, even if this increase is temporary. In the long term, the results are more variable: some studies show a lasting increase in baseline levels, while others do not. However, training intensity seems to play a central role: more demanding protocols induce greater post-session increases, which potentially means a higher dose of neurotrophic stimulation.

The case of IGF-1 is equally interesting. Secreted largely by the liver and released by the muscles during contraction, it increases after resistance exercise, even in older people or those with cognitive decline. Its action could be twofold: amplifying brain plasticity through direct interaction with BDNF and helping to reduce amyloid production.

In short, weight training not only strengthens muscles, it also modifies the internal environment on which the survival and function of neurons depend, directly targeting key factors in brain aging. This mechanistic basis would explain why the effects observed on cognition or brain structure are not artifacts, but the direct consequences of a more profound biological adaptation.

4. Effects of muscle strengthening on cerebral vascular health

Cerebral blood flow, the ability of arteries to adapt, the integrity of the endothelium, and the way the brain cushions pressure pulses: all of these constitute the infrastructure essential to neuronal health. Strength training modifies precisely these mechanisms, sometimes in ways that are radically different from aerobic exercise.

With each repetition, strength training exposes the arteries to strong pressure oscillations. These alternating variations (a sudden rise during contraction, an immediate drop during relaxation) create a particular type of hemodynamic stress. Far from being harmful in the context of controlled training, this unique signature could promote specific vascular adaptations aimed at protecting the brain.

Some of the literature, particularly in young adults, shows that resistance training can increase central arterial stiffness. However, arterial stiffness is linked to hypertension and other cardiovascular diseases. However, recent data strongly qualifies this interpretation. Several studies have shown that the cerebral arteries of regular weightlifters become more effective at cushioning pulsations and better at regulating perfusion, even when arterial stiffness increases slightly. In other words, the vascular system seems to adapt to better tolerate high pressures without compromising the brain.

This phenomenon is reflected in particular by a decrease in the pulsatility index of the middle cerebral artery in trained individuals. This reduction is interpreted as an improvement in the “buffering” capacity of the cerebral arteries: they allow a more stable, less pulsatile flow to pass through, thus protecting vulnerable microvessels. In a context where excessive pulsation is strongly associated with the risk of dementia, this adaptation appears to be of major importance. In addition, in people who regularly engage in weight training, the brain’s sensitivity to pressure increases and decreases appears to be better balanced. In other words, their brains are better able to tolerate hemodynamic challenges. This could reduce the risk of harmful hyperperfusion during intense exercise, but also of underperfusion during drops in blood pressure, a common phenomenon in older people and a risk factor for dementia-related diseases.

One particularly interesting finding concerns endothelial adaptations: several studies show an improvement in nitric oxide availability and vasodilator function after regular training, even at moderate intensity. This may explain the observed increases in cerebral perfusion at rest, particularly in key regions such as the hippocampus, cingulate cortex, and temporal lobes. For an aging brain, which can lose up to 20% of local perfusion in certain vulnerable areas, these few percentage points of gain represent a valuable metabolic safety margin.

Finally, some recent data suggest that strength training may indirectly improve the integrity of the blood-brain barrier in older adults through a combination of endothelial improvement, reduced inflammation, and stimulation of vascular endothelial growth factor (VEGF). Although these results still need to be confirmed, they support the idea that muscle strengthening not only affects the volume of blood reaching the brain, but also the vascular quality through which this blood circulates.

Overall, the scientific literature converges on the idea that strength training can beneficially remodel cerebral vascular function by improving flow regulation, attenuating pulsatility, and strengthening the protective mechanisms that preserve neuronal tissue.

5. Effects on brain structure

When it comes to brain aging, brain structure (its volume, the integrity of gray and white matter, and the health of the hippocampus) is one of the most tangible markers of decline. However, these morphological changes appear late in the neurodegenerative cascade , following inflammation, oxidative stress, vascular dysregulation, and amyloid deposition. Nevertheless, they are closely linked to cognitive abilities, and their progression largely predicts the transition to dementia.

Most publications report overall positive effects of strength training on brain gray matter in certain regions, but its effects on the overall structure of the brain are less clear. Some studies report a reduction in overall brain volume after a year of intensive training, while others reveal areas of preservation or even local increases in volume. For example, a 2010 study observed a significant reduction in overall brain volume after one year of progressive high-intensity weight training (2 sets of 6-8 repetitions at 70-85% of 1RM, once or twice a week) in older women with no signs of dementia. However, this overall reduction in volume was accompanied by a significant improvement in cognitive function. Another study from 2015 did not observe any improvement in the rate of gray matter atrophy in 155 elderly women during a year of strength training (2 sets of 6-8 repetitions at 70-85% of 1RM) despite clear improvements in memory.

One explanation put forward is the reduction in amyloid load or inflammation, leading to a “tightening” of the tissue. This phenomenon, also seen in some anti-amyloid drug trials, suggests that less volume does not always mean less function. The brain, freed from some of its toxic load, may function more efficiently despite reductions in volume.

Brain adaptations may also depend on the region of the brain, the type of training, and initial health status. Several studies show that muscle strengthening, especially at high intensities, protects the hippocampus, a region central to memory and one of the most sensitive to neurodegeneration and atrophy. A randomized, controlled 6-month weight training protocol (3 sets of 8 repetitions at 80% of 1RM, 2-3 times per week), followed by 200 seniors, produced a neuroprotective effect by reducing the rate of atrophy in specific subregions of the hippocampus, such as CA1, the dentate gyrus, and the subiculum, compared to the control group. These subregions are associated with autobiographical memory, the encoding and retrieval of episodic memories, and hippocampal synaptic transmission. The gains observed after a few months of training therefore reveal a form of structural plasticity that sometimes lasts up to a year after the program has ended.

The hippocampus and its subdomains show high levels of neurotrophic factors (IGF1, BDNF) with weight training. If we add to this the regional increases in cerebral blood flow mentioned above, this increased expression of neurotrophic factors in response to muscle strengthening could facilitate neurogenesis and synaptic plasticity in the hippocampus and its subdomains.

White matter hyperintensities (WMH), which are very common with age, reflect microdamage related to perfusion, pulsatile pressure, or inflammation. They are a major risk factor for cognitive decline. Several studies show that resistance training slows the progression of these lesions and even improves white matter density in certain areas. The benefits sometimes depend on the frequency of training: two sessions per week seem to be the minimum threshold for achieving robust effects.

Other data show improvements in functional connectivity in specific networks, particularly the sensorimotor network and attentional networks. In an aging brain, where communication between regions deteriorates, any improvement in this connectivity represents a significant functional gain.

Finally, certain protocols combining muscle strengthening and improved metabolism (better blood glucose, better insulin sensitivity) suggest that the structural effects could also be linked to a partial restoration of brain metabolism, which is particularly critical in neurodegenerative diseases. Thus, even if the literature is not consistent, all the data converge on the idea that strength training not only changes brain function, but also influences its structure.

6. Effects on cognition

After examining the biological, vascular, and structural mechanisms, one central question remains: does muscle strengthening actually improve cognitive function? The data from the scientific literature remains mixed, although the overall trend would suggest a positive link depending on the cognitive domains, the intensity of the training, and the initial condition of the participants.

Cognition is not a homogeneous block and encompasses various functions such as memory, attention, mental flexibility, inhibition, and processing speed. Not all of these functions rely on the same neural networks. However, strength training influences these functions through distinct pathways, which explains the sometimes contrasting improvement profiles.

The majority of studies show a notable improvement in executive functions: the ability to plan, inhibit, adapt, and manipulate information. These benefits have been observed in healthy older adults and in those with mild cognitive impairment. This sensitivity of executive functions is not surprising. They are highly dependent on the prefrontal cortex, a region that directly benefits from improvements in perfusion, increased BDNF, and the cognitive stimulation inherent in strength training (coordination, motor control, movement adjustment).

The link between weight training and memory is more complex. Training intensity appears to play a key role. Protocols using moderate to high intensities (approximately 70–85% of 1RM) produce the most pronounced effects on memory, particularly episodic memory and working memory. This may reflect greater stimulation of neurotrophins and more sustained activation of hippocampal networks. Next, the gain in strength itself (and perhaps muscle mass) appears to be an important mediator. Individuals who make the most progress in muscle strength are also those who make the most progress on memory tasks. This association suggests that strength training acts not only through mechanical or metabolic effort, but also through the profound neuromuscular adaptations that accompany it.

A 2015 study showed that cognitive improvements, particularly in memory, could persist one year after stopping a weight training program (1 year, 1 session per week, 2 sets of 6-8 reps at 70-85% 1RM). This persistence is consistent with the lasting effects observed on hippocampal structure and white matter. Once triggered, certain neural adaptations therefore seem to persist even without continuous stimulation.

Weight training is a cognitively demanding exercise. Selecting the load, regulating your breathing, coordinating several muscle groups, maintaining technique, counting repetitions, managing effort… All of this engages brain regions related to planning, attention, and motor control. In other words, weight training acts as both a physical and a cognitive stimulus. Not all studies show significant effects, particularly when the weights used are low, the progression is not individualized, or the total duration is insufficient. Memory tasks also seem to be more sensitive to methodological variations than executive functions.

7. How to prescribe weight training for seniors

While muscle strengthening has real neuroprotective potential, it must be applied in a reliable, safe manner that is tailored to the needs of older adults. Furthermore, even the best intervention will have no effect if individuals do not stick with it over time. This is why prescribing strength training for seniors cannot be limited to a theoretical plan: it must take into account the physical, psychological, and social constraints that determine long-term commitment.

One of the first obstacles is the low confidence that many seniors, especially women, have in their ability to do strength training. Fears of accidents, the “dangerous” image of free weights, or the idea that strength training is only for younger people create a significant psychological barrier. However, when programs are well supervised, adherence rates are surprisingly high. Some studies report more than 85% attendance, with satisfaction rates exceeding 90%. Participants highlight three key factors: perceived progress, perceived safety, and above all, the social aspect of the program.

On a practical level, it is strongly recommended to start with guided exercises and controlled loads, particularly for untrained individuals or those with functional limitations. Machines reduce compensation, improve stability, and make movements predictable. Over time, the gradual introduction of freer movements can improve coordination, but this is never a requirement.

In terms of intensity, the standard recommendations apply: start low (40–60% of 1RM) and then gradually increase to moderate (60–75%) or high (70–85%) intensities, depending on tolerance. The principle of progression is essential: it stimulates neuromuscular, vascular, and cognitive adaptations. Sessions that are too stable, without any increase in load or difficulty, produce limited effects. Conversely, excessive progression increases the risk of giving up. Finding the right balance is the coach’s responsibility.

For people with chronic conditions (diabetes, hypertension, cardiovascular disease), weight training is not only possible but recommended, provided certain principles are followed. For diabetics, blood sugar monitoring is important and training should avoid periods of high insulin activity. For people with high blood pressure, it is crucial to avoid involuntary Valsalva maneuvers, mainly by controlling breathing and favoring moderate loads at the outset. For people with cardiovascular disease or post-stroke conditions, guided exercises, slow movements, and stable positions are preferable.

Older women are a key target group. They are more affected by sarcopenia and osteoporosis and have more concerns about muscle strengthening. However, the cognitive and structural benefits are comparable to, or even greater than, those observed in men. Short programs (20–30 minutes), twice a week, focused on slow progression and the social dimension, seem particularly effective in improving adherence.

Finally, the strength training program does not need to be “perfect” to be beneficial. Many simplified forms, such as home workouts, using elastic bands, or isometric exercises, are sufficient to achieve benefits if progress is continuous. Combined programs (strength training + walking, for example) also greatly increase adherence, while reducing the perceived training load.

Strength training is therefore not only feasible for seniors, but can also be highly enjoyable, safe, and effective if well designed. With appropriate supervision, it becomes a realistic intervention to combat functional, cognitive, and cerebral decline.

8. Innovative approaches

While “traditional” strength training, i.e., using free weights and machines, is a powerful intervention for preserving brain health, several other approaches can increase adherence, adapt training to age-related constraints, or amplify cognitive and vascular benefits. These strategies are not intended to replace conventional training, but to offer relevant alternatives for a variety of profiles, particularly those for whom heavy weights or technical exercises are not suitable.

One approach that has been highlighted is dual-task exercises: combining a cognitive task with a strength training exercise. A study published in 2024 showed that this method is more effective than strength training alone in improving cognitive function in seniors with cognitive impairment.

Blood flow restriction training (https://sci-sport.com/optimiser-usage-occlusion-vasculaire-musculation-248/) is an interesting approach for people who would not tolerate heavy lifting well. Cognitively, according to a 2024 study, this method (at 30% of 1RM) appears to induce improvements similar to those observed with conventional training (at 70% of 1RM), particularly in mental flexibility, while generating less mechanical and cardiovascular fatigue. Furthermore, the available data show no negative effects on vascular or microvascular function in older adults.

Another approach involves the use of elastic bands or forms of training based on speed (high-speed RT). These more accessible formats generate strong neuromuscular stimulation while reducing the absolute load. Several studies show interesting effects on cognitive functions, particularly through improved muscle strength, which is closely correlated with functional performance and certain aspects of memory. Elastic bands also provide a reassuring environment for novice exercisers or those who are anxious about handling free weights.

The use of electrical muscle stimulation (EMS) (https://sci-sport.com/les-effets-de-l-electromyostimulation-surimposee-sur-la-force-et-les-performances-anaerobies-067/), combined with exercise, is also recommended for people with limited mobility. Initial studies show that this combination can improve strength, functional performance, and even certain cognitive abilities.

Finally, digital approaches are a particularly modern way to encourage participation. Online programs, video coaching, interactive sessions, and dedicated platforms make it possible to reach people who are reluctant to go to the gym or who live far away. Initial results suggest benefits for mood and mobility, as well as good adherence, even with very simple formats. These tools offer two advantages: they lower the barrier to entry and encourage regular practice, which remains the sine qua non for cognitive and cerebral benefits.

All of these approaches considerably expand the possibilities for intervention. By integrating individual preferences, functional abilities, and medical constraints, these methods make it possible to adapt muscle strengthening without sacrificing its effectiveness, which is particularly valuable in the prevention of cognitive decline.

Conclusion

Our understanding of brain aging has evolved profoundly over the past 20 years. Neurodegenerative diseases are no longer perceived as simple neuronal pathologies, but as the result of a progressive imbalance involving metabolism, vascularization, inflammation, oxidation, and the blood-brain barrier. This conceptual shift paves the way for new preventive strategies that are more systemic and integrated, with muscle strengthening playing a key role.

Beyond its impact on muscle strength and mass, the neuroprotective effects of weight training are multifactorial and have a direct effect on the mechanisms associated with dementia. Strength training thus attenuates oxidative stress, reduces chronic inflammation, improves the availability of neurotrophins, promotes the maintenance of cerebral perfusion, and strengthens vascular regulation, particularly in regions vulnerable to neurodegeneration such as the hippocampus.

The structural benefits observed in the hippocampus, white matter, and functional networks are not anecdotal. They reflect the brain’s real ability to remodel, protect itself, and even recover certain functions when properly stimulated. The fact that some effects persist one year after stopping training confirms that strength training produces profound adaptations that go far beyond simple physical performance.

One of the strengths of this intervention is its flexibility. Strength training can take many forms: free weights, machines, elastic bands, speed work, BFR, EMS, dual-task exercises, home formats, or online programs. This diversity allows it to be adapted to almost any profile: frail individuals, people with MCI, active seniors, women who are reluctant to go to the gym, and people with cardiovascular or metabolic comorbidities.

Too often, strength training is still considered an optional supplement to aerobic activity. Scientific research shows, on the contrary, that it should be thought of as an integral part of preventing cognitive decline and promoting brain health. It is not a question of pitting cardio against strength training, but of recognizing that each acts on different and complementary aspects of the aging brain.

Reference

Allison EY, Bedi AM, Rourke AJ, Mizzi V, Walsh JJ, Heisz JJ and Al-Khazraji BK. Resisting decline: the neuroprotective role of resistance exercise in supporting cerebrovascular function and brain health in aging. Front Physiol 2025 16:1606267.