They're not the most well-known ab isolation exercise, but they are documented on exrx and Icecream Fitness 5x5 recommends them as the only ab isolation needed in the routine. Does anyone know/have ...
I use a machine to do 8-12 crunches to failure. I also like to perform sit-ups to failure (and I feel it in the front of my hips, not my abs). Does it matter in which order I do these two exercises? ...