Should you do push-ups and sit-ups every day?
Any kind of exercise is good .Body needs to burn calories doing push-ups and sit-ups not only burns calories but also improves for body posture and core strength.Doing these small things everyday can be helpful to reach a fitness level you aspire to get.
Simple rule of fitness should be you should burn calories proportional to amount of calories you intake.If your calories intake is high you should do more push -up and sit-ups .
Start as early as possible to have routine of these exercises everyday and gradually increase your count of routines and you will see impact on body core strength within weeks.
Enjoy this with a smiling face life will be beautiful.