We've said it before, and we'll say it again: when building a strong core, sit-ups aren't always the best option. Not only can regular sit-ups and crunches put strain on your lower back, you're only ...

To the untrained eye the L-sit might look like a simple pose, but don’t be fooled, this gymnastics move is one of the most brutally effective exercises out there. Yes, technically the L-sit is just ...