
How does exercise influence your life
Exercise is at the forefront of conversations about promoting strength and physicality but beyond this there are various further impressive benefits from regular exercise. Even modest amounts of consistent activity can have meaningful effects across multiple systems in the body.
Increases Longevity
A substantial body of research links regular physical activity with a longer lifespan, with one review of literature revealing that regular physical activity is associated with a 0.4 to 6.9 year increase in life expectancy. Exercise supports longevity by improving cardiovascular health, metabolic function, and cellular resilience.
Studies consistently show that exercise helps maintain good cardiovascular health, reducing the risk of developing cardiovascular disease such as coronary heart disease. Exercise also assists with blood glucose regulation and insulin sensitivity, which are important factors in reducing the risk of metabolic conditions.
Physical activity can also influence aging at a cellular level. Aging is marked by genomic instability due defections in nuclear architecture and lesions in the DNA, however evidence indicates that exercise can help mitigate this through increasing DNA repair activity. Additionally, exercise has been associated with improved mitochondrial function, which supports the body's ability to produce energy efficiently, and has been suggested to induce widespread epigenetic alterations by increasing DNA methylation.
Supports Cognitive Health
Exercise has been shown to have various impressive cognitive health benefits, influencing both short-term cognitive performance and long-term cognitive health. Multiple cross-sectional and epidemiological studies have shown that physical exercise can enhance memory, support the efficiency of attentional processes and executive control. Additionally, one study found that, following 12 weeks of aerobic exercise MRI scans showed significant changes in cerebral blood volume in the dentate gyrus and this correlated with improved cognitive performance in a measure of learning, memory formation and recall.
During physical activity, blood flow to the brain increases, delivering oxygen and nutrients that support neuronal function. Exercise also stimulates the release of compounds involved in brain health, including brain-derived neurotrophic factor, which plays a role in supporting the growth and maintenance of neurons.
Evidence also suggests that physically active individuals may have a lower risk of cognitive decline later in life. For instance, various studies have shown that remaining physically active can mitigate the risk of developing dementia as well as reduce executive function deterioration. While exercise alone cannot guarantee protection, it appears to be an important part of a lifestyle that supports long-term brain health.
Enhances Mood
Staying physically active has a well-documented influence on emotional wellbeing and many people notice improvements in mood shortly after exercise. There are several biological mechanisms behind this effect. Exercise stimulates the release of endorphins and other signalling molecules that can enhance feelings of wellbeing. It also influences neurotransmitters such as serotonin and dopamine, which are involved in mood regulation. In addition to these biological effects, exercise can reduce stress by lowering levels of certain stress-related hormones and activities such as walking, yoga, cycling, or strength training can provide a constructive outlet for physical tension and mental strain.
Beyond simply improving mood, exercise is believed to be valuable for treating mental health disorders. For instance, one systematic review of literature found that exercise may be effective for treating depression, helping to alleviate symptom severity. Additionally, increased physical activity can aid in attenuating some psychotic symptoms linked to psychotic disorders such as schizophrenia.
Supports Sleep
Sleep quality is also strongly influenced by physical activity. Regular exercise acts as a zeitgeber and helps regulate the body's sleep-wake circadian rhythm, supporting more consistent sleep patterns. Additionally, engaging in physical activity increases the body's need for restorative sleep, which can make it easier to fall asleep and may promote deeper sleep cycles. Improved sleep efficiency means spending more time in restorative stages of sleep rather than waking frequently throughout the night.
Exercise may also help reduce symptoms of insomnia in some individuals. For example, one study found that both physical exercise and mind-body exercise interventions led to improvements in subjective sleep quality for adults with insomnia. A further study found evidence indicating that being physically active for five or more days a week may help to reduce insomnia.
Conclusion
Exercise acts as a cornerstone for a healthy lifestyle. When combined with balanced nutrition and adequate rest, regular exercise can help support both immediate wellbeing and long-term health outcomes. Importantly, exercise does not need to be extreme to be effective, being consistently physically active is often more important than intensity, and a balanced routine that combines aerobic activity, resistance training, and regular movement throughout the day can support multiple aspects of health.
Sources
https://pmc.ncbi.nlm.nih.gov/articles/PMC3395188/
https://pmc.ncbi.nlm.nih.gov/articles/PMC8202894/
https://pmc.ncbi.nlm.nih.gov/articles/PMC3951958/
https://pmc.ncbi.nlm.nih.gov/articles/PMC5934999/
https://pmc.ncbi.nlm.nih.gov/articles/PMC9902068/