Assessing Force Reduction
Initially I use a lunge test. Look at the difference in distance right to left, look at ability to smoothly return to stating position without deviations. You can also look at Lateral lunge for frontal plane and then rotational lunge for transverse plane. I also use a hop and stick test. Hop for distance and stick the landing and hold for five seconds, repeat with the other leg. They should be able to absorb ankle/knee/hip.