Stomach cramps when doing sit-ups can have a number of different causes and should be easy to avoid when you isolate the reason for them.

Straight-leg sit-ups are an alternative to the more popular bent-knee sit-ups. Learn how to perform the straight-leg sit-up and some of its benefits.

Naturally thin legs, arms and belly are a genetic blessing. Work with the body you have to lose weight and increase tone to make the most of your physique.

A fractured back needs to be evaluated by a medical professional; however, a gentle strengthening routine can build the muscles and help prevent re-injury.

Your baby needs strong abdominal muscles to roll over, sit up, crawl, stand and walk. Help her develop those muscles with targeted exercises.

Are you working out diligently but coming up with uneven results? Let’s have a look at some possible causes and, hopefully, solutions.

If you're skinny but have a bit stomach, understanding where that bulge might come from could help you get rid of it.

Although it’s possible to get a rough idea of how long it will take to get into shape you desire, there’s no magic formula.

When using an incline board, proper form is more important than ever. This goes double for sit-ups, which already carry a high risk of injury to the lower back.

Lose lower belly fat like you lose any body fat — with a diligent diet and exercise ethic. Targeted exercises help with strength, too.

But understanding more about how muscles work and how they respond to “reps” in general could help you make better choices for your fitness regimen.

There are two exercises you can’t do without if you want well-conditioned abs: the sit-up and the crunch, also known as the curl-up.