Calisthenics is more than brute strength. It is skill-oriented and your personal practice depending on the skills.
Many are stiff and can't even reach the floor when bending forward.
I bet you stumbled across the push/pull/legs split somewhere before on your training's journey.
The third and last workout of my beginner's program gets your legs trembling.
Everybody should be able to squat - let's change that!
Legs can produce tremendous amounts of forces - therefore getting the machinery running is crucial.