Is it necessary that our body be warmed up before doing push ups? (Condition) Is it OK to do strength exercise (mainly push ups) every 2-3 hours? (Definitely not just after and before eating, but do it whenever I get the chance)
Scenarios:
Suppose I'm studying in my room and after 2 hours, I need to give myself some rest from studying, so I switch to stretching, push ups, plank, dumbbells, sit ups, hand gripper. Is it OK to do so?
Is it OK to use a hand gripper during a boring class?
I'm not a native English speaker, so please excuse my English and my inability to formulate the question properly.