handstand
In the first week of the challenge, Zhang soon realizes which of these exercises will be the hardest. "Each workout comes with its own challenges," he says. "This handstand shit is a constant bitch slap in the face, because every time you attempt it, you just fail. You fall on your ass, boom. Fail, fail, fail."
By the end of the first 30 days, Zhang is still struggling to maintain a handstand to any decent form. "I might need another couple weeks," he says, and so he extends the Rock Lee challenge to a second month. 60 days after first beginning this workout, his technique, endurance and performance have all significantly improved—as has his muscle definition.