Originally Posted by koffee brown

I know the bicycle crunch- knees bent, then opposite elbow to opposite knee, and reverse. Keeping legs straight up and pressed together, then slowly lowering to the ground is NOT an abs exercise. People think it is, but it's not. Or at least, not unless you only lower the legs to the point just before the lower back lifts off the ground. Not too many people have the lower back flexibility to lower the legs all the way to the floor. Then it just becomes a hip flexor exercise. Cyclists already have strong hip flexors. Overtraining them may just create more of a muscle imbalance and set you up for a groin injury later on down the line.

Koffee