Can I understand how human thighs "work"? Kind of like a lever, connected by muscles and tendons, similar to an arm.

It is best not to do strenuous exercise after a strain. If it is a track and field team or something, perseverance is another matter, and it will recover in a month or two. Moreover, you will find that your recovery period after a strain is shorter than others. However, it is only a strain during exercise, so we should reduce the intensity of exercise and pay attention to the combination of work and rest. okay

Luck