Think about it: If you're doing crunches on the floor, you can only go so far back. Using an ab machine, such as a decline bench or exercise ball (no, that may not seem like a 'machine' but more ...

By engaging your lower abs, reverse crunches help strengthen and tone ... fitness levels since they don’t require heavy weights or machines, Cardiello says. In addition to building strength ...

Crunches are a great way to work your abdominal muscles, but if you just can’t get on board with them – because, let’s be honest, they’re not the easiest exercise or that fun – there are ...

Neck pain is an especially common complaint when people do abdominal crunches. Although crunches seem easy, research suggests that they can increase the risk of low-back pain when they’re not ...

Bicycle crunches are a great exercise for building core strength in runners – and are harder than they look. The exercise is a variation of an ab crunch, where one leg flexes while the other ...