There are several ways to progress an exercise, including.

a) Speed of movement.

The quicker you move the more explosive the exercise.

b) Range of movement.

Performing the same exercise but with a great range of motion.

c) Reducing base of support.

A smaller base of support increases the difficulty of the exercise.

d) Plane of movement.

Establishing a solid foundation in the sagittal plane before moving onto the frontal plan and transverse plane.