Exercise intensity refers to how much energy is expended when exercising. Perceived intensity varies with each person. It has been found that intensity has an effect on what fuel the body uses and what kind of adaptations the body makes after exercise.
Most people when they are about to catch a ball they have there hand ready but soft, try having your hand ready but at a angle and when you catch it tighten your hand mucsles as fast as you can, you will feel less sting
Most likely your body won't be as harmed the 2nd time due to the preparation of your cells.
For adult it is 30:2 and for children it is 15:2
