Take on this intense ab challenge to strengthen and tone your core before the new year! Complete 200 mountain climbers, 100 ...

You haven't seen a mountain climber exercise like this before. Here's how to turn up the heat with an intense pyramid routine from trainer Kirsty Godso. Kirsty Godso, a Nike master trainer, recently ...

Wall sits are a static exercise that builds endurance in the muscles of the lower body. By holding a squat position against ...

The mountain climber can be a surprisingly effective exercise (just look at how 30 days of mountain climbers can totally transform your body). And doing a few sets with a friend or workout buddy a few ...

The mountain climber is a core training staple that can help build a strong core and get you moving, but are you sure you're even doing the exercise correctly? For this movement, you shouldn't settle ...

With feet inside TRX straps, hold yourself in an upright plank position. While in plank, alternately drive your knees into your chest. Be sure to engage your abdominals and lock out arms to keep your ...