Hello
the answer is a
have a nice day
The answer to this is Plan a steady progression of exercise intensity.
Answer:they are unsafe and safe at the same time
Explanation:
Okay, this is an interesting one but mainly no, most activity's will so you don't push yourself but if you really wanted to you could go for however long you want as long as you are not doing harm to your body, depending if you are on a fitness program there will be limits.