Total body workout? As in, all your body moves? Ok. But barely any muscles actually elongate and contract, which is how muscles grow and become stronger. Dynamic is far superior to any isometric for muscle development, without exception. How, if its an all body workout, is loading the spine with weights a good bicep workout compared to dumbell curls??? Now do that for every other muscle is this 'all body workout'. If you simply want to burn calories and enjoy that exercise then great, happy days, however, thats not the best way to work an individual muscle group for the legs. Time, efficiency, risk, energy, biomechanics - all factors to consider here.