How does exercise support your heart and brain health?

Regular exercise is one of the most effective ways to support long-term health. As well as strengthening muscles, moving around contributes to a healthy cardiovascular system, supports brain function and lowers the risk of various chronic conditions. These benefits aren't just for athletes. Even moderate exercise can lead to measurable improvements in both physical and cognitive health.

Why is exercise important for a healthy heart?

You can also train the heart. Just like your muscles, it adapts when it's regularly put under stress.

During physical exertion, the heart pumps more blood to supply muscles with oxygen and nutrients. Over time, these repeated stimuli lead to cardiovascular adaptations that help the heart work more efficiently.

These adaptations include:

• a larger stroke volume (the amount of blood pumped per heartbeat)

• a lower resting heart rate

• better blood flow

• greater cardiovascular efficiency

This allows the heart to pump the same amount of blood with less effort, both during exercise and at rest. These adaptations are linked to a lower risk of cardiovascular disease and better overall health (1).

How does exercise support brain health?

A healthy heart also supports a healthy brain.

Better blood flow ensures that more oxygen and nutrients reach the brain, which is important for normal cognitive function.

Regular exercise is also associated with:

• a better memory

• more concentration and brain functions

• increased production of Brain-Derived Neurotrophic Factor (BDNF)

• greater neuroplasticity

BDNF plays an important role in the growth and maintenance of neurons and is considered one of the key mechanisms through which exercise supports long-term brain health (2).

How much exercise is recommended for heart and brain health? 

According to the World Health Organization (WHO), adults are advised to weekly do:

• 150 to 300 minutes of moderate-intensity aerobic exercise, or

• 75 to 150 minutes of vigorous aerobic exercise, complemented by

• at least two sessions of muscle-strengthening exercises per week (3)

These recommendations are sufficient to support measurable improvements in cardiovascular health, metabolic health and cognitive functions.

For most people, consistency is more important than extremely intense training. By making exercise a consistent part of your lifestyle, the health benefits can build up gradually.

Which forms of training offer the greatest health benefits?

Not every form of training stimulates the same physiological adaptations. By combining different forms of exercise, you can support cardiovascular health as well as muscle function and metabolic health.

A balanced training program ideally combines these different types of training, tailored to individual fitness levels, personal goals and capacity.

Strength training helps to maintain muscle mass and bone density. Endurance training mainly supports the cardiovascular system and aerobic endurance. HIIT can, if applied properly, contribute to improvements in cardiovascular fitness and VO₂ max in relatively short training sessions.

Combining these types of training ensures that different physiological systems are stimulated, allowing the health benefits to complement each other.

Why is recovery just as important as training?

Exercise only provides the stimulus. The actual physiological adaptations take place during recovery.

Sufficient sleep, a balanced diet and enough recovery time give the cardiovascular system, muscles and nervous system the chance to adapt to the training load.

Without enough recovery, training adaptations remain limited and the risk of fatigue, overtraining and injury increases.

The intensity and frequency of the training sessions also play an important role here. A well-balanced training schedule combines load and recovery, so your body can gradually adapt.

How do exercise and 5 Day Fast complement each other?

Exercise and 5 Day Fast should not be seen as competing strategies.

They support health through different physiological mechanisms and can actually complement each other within a healthy lifestyle.

Regular exercise mainly supports:

• cardiovascular fitness

• muscle strength and muscle function

• oxygen transport

• brain health

5 Day Fast mainly supports:

• metabolic flexibility

• insulin sensitivity

• cellular repair mechanisms

• temporary metabolic adaptations associated with a fasting programme

Both strategies therefore have a different mechanism of action, but together they can contribute to better metabolic health and a healthier lifestyle in the long term.

Regular exercise helps to keep the body strong and fit all year round. 5 Day Fast can, when applied in the right way, support specific metabolic adaptations that occur mainly during and after the programme.

They complement each other, but do not replace each other.

Does exercise remain the foundation of a healthy lifestyle?

Yes. Regular exercise remains one of the most effective ways to support heart and brain health and lower the risk of various chronic conditions.

By combining exercise with enough sleep, a balanced diet and sufficient recovery, key physiological systems can adapt and keep functioning optimally.

5 Day Fast can complement this healthy lifestyle by supporting temporary metabolic adaptations and cellular repair mechanisms. The greatest benefits occur when both strategies are part of a broader and sustainable approach to health.

Ultimately, good health isn't about a single intervention, but about the combination of daily habits that reinforce each other.