Grip strength is also related to the muscles of the palm. Maybe the palm muscles of the landlord are not developed enough.

Do push-ups with your fingers, remember, do what you can, don't be greedy, and relax your finger muscles after you finish.

The second one is bouncing. It has something to do with talent. The first is the length of your calf tendon. The longer the tendon, the better your jumping talent. Pay attention to the flying man in NBA and you will understand.