Dont take it if your doctor says to then you can because if you take it you might die
Answer:
I think it may be the last one
The overload princiole could make this workout more challenging as this is a full body workout and the point of overload is to push ur body until you cant do anymore which will cause you to achieve strength and muscle mass faster than small workouts. this specifically is good because its a full body workout and you will push your body to the best of its abilities. Hope this helped !!
The spine bends to reduce and absorb shock when walking, running, jumping, or anything that would put an excessive amount of stress on your spine
Hope this helps