Bend your legs instead of thigh muscles, or squat. Of course, you can add a lot, so that you can squat on one leg in the future.

Recumbent barbells are recommended to replace biceps and back muscles of pectoralis major, so do push-ups. There are many ways to find many on the Internet.

Sitting posture equipment rowing replaces thigh muscles, pectoralis major muscles, waist muscles and back muscles, so I won't say this, it's all on it.

Rope down instead of pectoralis major, dorsal muscle is the main one, there is nothing to say.

All the above contents, push-ups, sit-ups and squats, are nothing more than these three. Of course, this is definitely not obvious without equipment. Practice slowly.