The muscles of the legs are mainly the muscles of the calves, thighs and buttocks. The general exercises are as follows.

First, squat, this is the main exercise for thigh muscles, including hip muscles. It can thicken muscles and is the most effective exercise method for thigh muscles. This can be used to do weight-bearing exercises with the best effect.

Second, the frog jump, which is what you said, is mainly to exercise thigh muscles and improve muscle elasticity and tension.

Third, raise your legs and thighs,

Fourth, lift heel, the magic weapon of calf muscle exercise, can also use weight-bearing exercises to increase strength.

The number of exercises, generally speaking, muscle exercises should be practiced in groups, which can be grouped according to your own situation, one group 10-20 times, take a break for one minute and enter the next group of exercises, and generally do 6-8 groups for one action.

If the above items are not clear, you can check the video online, which explains clearly.

I hope it helps you.