Which activity is an example of vigorous intensity exercise?

Vigorous intensity exercise is characterized by activities that significantly elevate the heart rate and breathing and typically require a higher level of effort than moderate intensity activities. CrossFit training exemplifies this category because it incorporates high-intensity interval training, strength exercises, and varied movements that challenge both cardiovascular fitness and muscular strength. This type of training often pushes participants to their personal limits in terms of exertion and energy expenditure, thus categorizing it as vigorous intensity exercise.

In contrast, slow jogging tends to be a moderate-intensity activity, as it allows for conversation and does not substantially elevate heart rate compared to vigorous activities. Water aerobics often falls within the moderate intensity range as well, due to the buoyancy of water reducing impact and resistance. Leisurely biking, similar to slow jogging, typically does not provide enough of a challenge to elevate heart rate to the vigorous level, often allowing for ease of conversation. Therefore, the distinguishing characteristic of CrossFit training is its demand for substantial effort and stamina, making it an ideal example of vigorous intensity exercise.