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.
Answer:
Sadness can slow you down, and make you really think about your life, your feelings and the people around you. It can help you keep sight of your relationships and dreams.
Being sad doesn’t mean you are not coping with a situation. Rather, it helps you come to terms with that situation and move on. It is an important emotion that can help you adapt, accept, focus, persevere and grow.
