But the exercise is surprisingly challenging­-and a great way to test your lower ... Try to hold the wall sit for 20 to 60 seconds. Then push through your feet to stand up If you held the wall ...

The popular 30-day sit-up challenge continued to scale new heights of virality. A great test for core strength, this fitness ...

First on the test: unlimited sit ups in a minute. You needed 35 sit ups in perfect form to get one point. Saha completed 33. After a five minute rest, it was time for a 300 meter sprint.