Some milder dances, such as square dancing, are not considered strenuous exercise, while more intense dances, such as street dancing and jazz dancing, are considered strenuous exercise. Vigorous sports are those in which the heart beats more than 120 times per minute, with high explosive power, large range of motion and high frequency.
Vigorous exercise is exercise that is explosive, with a large range of motion and a high frequency that puts a greater load on the heart and lungs. Generally when the heart rate exceeds 120 beats per minute, it belongs to strenuous exercise. The vast majority of anaerobic exercise in life is strenuous exercise.