One of the first exercises I did when I started CrossFit was this move called an AbMat sit-up, named after the mat you place under your lower back for support. I couldn't believe how sore I was for ...

Four minutes of wall ball sit-ups. That was at the end of a recent CrossFit workout I took, and I was floored by how much this exercise worked my arms — they got sore faster than my abs! Jade Jenny, ...

When Richie Glanzer joined the CrossFit gym in Copiague six months ago, he struggled to complete the workouts. On his third day, he had to alternate 100 squats with 100 burpees -- a move where you ...

Rosa Duarte from CrossFit Advanced in Easton, Pennsylvania, teaches you the proper way to perform the butterfly situp, which will strengthen your core. We may earn commission from links on this page, ...