Like any impact movement, when the stabiliser Muscles aren't engaged or are weak or fatigued, the joint can be compromised.
Good point. So much so, that I put on a pair of socks and tried it on a wood floor just now, sliding through the movement. I only did a few reps to see if it was feasible, and it is not how I did it this morning. When I do intervals again next week, I’ll try it both ways and see how the intervals compare.
I can see what your trying to do: 1. Be time efficient, H.I.T and H.I.I.T. 2. Program Cardio that doesn't fatigue Muscles before H.I.T. Have you tried Sprinting on the spot for 1 minute? Use some soft flooring of course.