Sit-ups target the abdominal muscles, specifically the rectus abdominis ... How many sit-ups should I do a day? The number of sit-ups you should do per day depends on your general fitness level ...

Sit-ups have stood the test of time as a go-to exercise for measuring core strength and endurance. Unlike crunches, which primarily target the upper abs, sit-ups recruit various muscles, including the ...

Beyond the 30 degrees other muscles come into play and start doing the work. Often people find when they do a sit-up is that the initial lift hurts, but then the exercise becomes far easier ...

The sit-up is still programmed, but many other exercises can strengthen your core muscles just as well ... not into your chest. To do this, think about directing your breath expansively downward ...

Chris Hemsworth’s trainer, Luke Zocchi, brings you a workout that’ll leave you feeling fitter and stronger ...

How to do mountain climbers: Get into a high-plank position with your wrists directly under your shoulders. Keep your core ...