Kalvinfredericks's channel

These are a great way to build explosive leg strength if you don't have access to weights or a gym.

Just one slow towel pull up will fry your grip, forearms, and biceps. On the downward part of the rep, I was aiming for 30 seconds -- but couldn't...

A 90 second chin up -- 30 down, 30 up, 30 down. Would like to have been slower on the final 30 seconds.