Spider-Man push-up progression

From easiest to hardest. Move to the next step when you can do the current one with good form.

1. Spider-Man push-up · Intermediate · reps
   A push-up in which, while the body lowers, one foot leaves the floor and that knee swings out to the side toward the same-side elbow, then returns as you press up; the sides alternate every rep.
2. Push-up with single-leg raise · Advanced · reps
   A push-up in which one straight leg is lifted behind you as you press up, then the other leg on the next repetition. The torso stays rigid: the lower back does not sag, the hips do not rise and do not rotate when the leg