Could be an example of a conflict depending on the body Language they display
Finding out if an exercise is safe needs to determine the fitness level of the exercise and how much it takes to achieve the result of the exercise. The person performing the exercise needs to know their endurance level and if they are able to perform the exercise without injury or illness.
I believe the answer you are looking for could be a range of answers. Here are the most common: pneumonia, GI infections, UTI’s, bloodstream infections (sepsis), and surgical site infections.
It's good for you to exercise, no matter the duration. Most children in today's world are attached to their phones like a leech to an open wound. If you sit down for long periods of time without exercising, you are neglecting your health and body.
Hope this helps!
Smile! Show off those teeth. Strong teeth are a sign of good overall physical health. Without them, you can't eat or even speak well. Your teeth are important.