In short:
- Regular training and the heart go hand in hand — movement lowers blood pressure, improves blood vessel function and reduces the risk of heart disease.
- WHO recommends that adults get 150–300 minutes of moderate aerobic activity per week (WHO, 2020).
- Every one-MET improvement in cardiorespiratory fitness is associated with about 13% lower all-cause mortality (Kodama et al., 2009).
- Combine aerobic training and strength training — both support the heart and longevity.
Training and the heart are deeply connected: regular physical activity is one of the most evidence-based ways to prevent cardiovascular disease and extend lifespan. This overview explains how movement affects the heart, how much you need and which type of training brings the most benefit. The aim is to give a clear, evidence-based picture without exaggeration.
How do training and the heart work together?
When you train regularly, the heart adapts to the demand: the heart muscle gets stronger and pumps more blood with every beat, which is why your resting heart rate drops. Aerobic training load also improves how the inner lining of your blood vessels (the endothelium) works and helps keep blood pressure lower. Review studies confirm that physically active people have a markedly lower risk of cardiovascular disease than people with a sedentary lifestyle (Warburton et al., 2006). Nystoriak and Bhatnagar (2018) describe how regular training improves several risk factors at once — blood pressure, blood sugar levels and the blood lipid profile.
Another important mechanism is the change in body composition. Movement supports a healthy body weight, and fat burning and training naturally go hand in hand, which in turn reduces the strain on the heart. The role of nutrition also deserves a mention: excess sodium intake raises blood pressure, so it is worth reading more about salt and health.
How much movement does the heart need?
The World Health Organization recommends that adults get at least 150–300 minutes of moderate or 75–150 minutes of vigorous aerobic activity per week, plus training that builds muscle strength on at least two days (WHO, 2020). These recommendations also apply to older adults as part of healthy ageing.
The benefit is dose-dependent. Kodama et al. (2009) found that every one-MET improvement in cardiorespiratory fitness is associated with roughly 13% lower all-cause mortality and a 15% lower risk of heart disease. In a large cohort study, Lee et al. (2014) showed that regular runners had around 45% lower mortality from cardiovascular causes and a life expectancy roughly three years longer. You can also find more detailed recommendations and dose-response relationships in the WHO physical activity guidelines.
Which type of training is best for the heart?
The strongest evidence is for aerobic endurance training — walking, running, swimming and cycling. Still, strength training shouldn’t be underestimated: combined aerobic and strength training improves both circulation and muscle mass, which is also important for older adults in preventing muscle loss (sarcopenia) (EWGSOP2; Cruz-Jentoft et al., 2019). Everyday function and balance are well supported by functional training.
Pedersen and Saltin (2015) emphasize that training can be regarded as medicine for many chronic diseases, including cardiovascular disease. The effects of training extend to hormonal balance too — you can read more about the link in the article testosterone and training. Consistency matters most: a regular, moderate training load does more for the heart than an occasional intense effort.
References
- Warburton DE, Nicol CW, Bredin SS (2006). Health benefits of physical activity: the evidence. CMAJ. PMID: 16534088
- Kodama S, Saito K, Tanaka S et al. (2009). Cardiorespiratory fitness as a quantitative predictor of all-cause mortality and cardiovascular events in healthy men and women. JAMA. PMID: 19454641
- Lee DC, Pate RR, Lavie CJ et al. (2014). Leisure-time running reduces all-cause and cardiovascular mortality risk. J Am Coll Cardiol. PMID: 25082581
- Nystoriak MA, Bhatnagar A (2018). Cardiovascular Effects and Benefits of Exercise. Front Cardiovasc Med. PMID: 30324108
- Pedersen BK, Saltin B (2015). Exercise as medicine — evidence for prescribing exercise as therapy in 26 different chronic diseases. Scand J Med Sci Sports. PMID: 26606383
- Cruz-Jentoft AJ, Bahat G, Bauer J et al. (2019). Sarcopenia: revised European consensus on definition and diagnosis (EWGSOP2). Age and Ageing. PMID: 30312372
Frequently asked questions
How quickly does training affect the heart?
The first changes, such as a lower resting heart rate and better blood pressure, can appear after a few weeks of consistent training, but lasting benefit requires regular movement over months and years.
Is strength training good or bad for the heart?
Moderate strength training is good for the heart and complements aerobic training by improving muscle mass and metabolism. WHO recommends muscle-strengthening training on at least two days a week (WHO, 2020).
How much should I move each week for heart health?
WHO recommends that adults get 150–300 minutes of moderate or 75–150 minutes of vigorous aerobic activity per week, plus strength training (WHO, 2020).
Is it worth starting at an older age?
Yes. Physical activity supports the heart and prevents muscle loss at any age, and it is an important part of healthy ageing; better cardiorespiratory fitness is associated with lower mortality (Kodama et al., 2009).
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