Exercise is physical activity for the purpose of improving health or achieving fitness and training goals. Depending on the type of activity, exercise is typically used to increase endurance, strength, balance, or flexibility, as well as for weight loss or other aims. Exercise is increasingly recognized as important for personal as well as public health, as it can play a major role in preventing or managing cardiovascular disease, diabetes, obesity, depression, and other conditions that impact a growing number of people around the world.
The potential health and fitness benefits of exercise have increased in recent decades thanks to a growing understanding of human physiology and the science of exercise. Properly designed training regimens can reduce the physical stress and injury risks from doing too much or the wrong type of exercise for your needs, and the science of nutrition has also provided insights into choosing optimal diets for individual needs and goals. Health data is also playing a growing role in exercise, as mobile phones, wearable devices, and apps can help record physical activity as well as track metrics like caloric expenditures and body mass index (BMI).‎