Fight against obesity with exercise in a heart-healthy way, with DHA


In a study designed to evaluate the effect of fish oil supplementation rich in DHA, with and without regular exercise, on heart rate variability (the variation in the time interval between heartbeats) in overweight adults with risk factors for coronary disease, fish oil supplementation improved heart rate variability (compared with placebo). And it also reduced heart rate at rest and during submaximal exercise (physical activity whose intensity increases at regular intervals up to, but never exceeding, 85 % of oneself maximum heart rate).

Obesity is related with health problems, and coronary heart disease is one of them (in this disease, coronary arteries are narrowed, thus reducing blood flow to the heart). If you are overweight, probably you know that regular exercise and a healthy diet are ways to fight against obesity. If this is your case and you are doing some sport to slim, you must keep in mind that obese people often have impaired heart rate variability. Little heart rate fluctuations are normal even in healthy people, but when variability is big or it has certain patterns, it can be a predictor of disorders as arrhythmia or heart failure. Therefore, if you are new to exercise it would be a good idea to talk to your doctor and your coach before starting an exercise program.

And remember that supplementation with DHA could help you, improving your heart rate variability during exercise.


Ninio DM, Hill AM, Howe PR et al. Docosahexaenoic acid-rich fish oil improves heart rate variability and heart rate responses to exercise in overweight adults. Br J Nutr. 2008 Nov;100(5):1097-103.


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