Timbaland & Magoo’s classic has inspired social media users to do the “Breathe In, Breathe Out” Push-Up Challenge. Some users are taking things to the extreme. The “Breathe In, Breathe Out” Push-Up ...

I recently did a challenge that was 100 push ups a day AND 100 pull ups a day for a whole month. It was pretty tough at first, but after about a week of it I felt like I could keep going on autopilot.

Two guys, one simple challenge: daily push-ups for a full month. We recorded every rep, tracked our progress, and compared the results at the end. Watch our transformations — both physical and mental ...