Proper push-ups are much longer on the down. Doing them this fast doesn't allow your muscle to contract the full length, meaning that there is less stress put on them and less lactic acid will build up per rep. This is the equivalent of ~30 proper push-ups.
Proper push-ups are much longer on the down. Doing them this fast doesn't allow your muscle to contract the full length, meaning that there is less stress put on them and less lactic acid will build up per rep. This is the equivalent of ~30 proper push-ups.