Squatting Cowgirl
Also called: Frog, Squat
On top, feet flat instead of knees down. Deeper and a real thigh workout.
One partner lies on their back. The other straddles them in a squat, feet flat on the bed on either side of their hips, and lowers down, moving up and down with their legs. Leaning forward and resting hands on the bottom partner's chest takes some weight off.
Depth and big, deliberate strokes, with the partner on top fully in control.
The bottom partner holds the squatting partner's hips to help lift. Switch to kneeling whenever thighs burn.
Go slow. Fast bouncing is how injuries happen in this one.
Bad knees should skip the squat. Coming down too fast can bend a penis painfully. Keep it controlled.
Agree on it before you try it, use plenty of lube, and either of you can stop at any point. This guide is general information, not medical advice.