Every week, a new STACK Challenge gives you an opportunity to test your athletic ability and win a STACK T-shirt. Take the challenge and enter to win by tweeting your results with #STACKChallenge.

Months before the ALS Ice Bucket Challenge became a sensation, athletes on YouTube were challenging each other to the 5-Minute Squat Challenge. If you want to give your friends a challenge they’ll really hate, consider the 5-Minute Squat Challenge.

Try it yourself by loading a barbell with your body weight and completing as many Squats as you can in five minutes. You can rack the weight as often as you like; just make sure your thighs get parallel to the ground on each rep. Pace yourself . The last minute will be brutal!

The Challenge

Squat your body weight as many times as possible within 5 minutes.

How Do You STACK Up?

Rookie: 30 reps
Pro: 40 reps
All-Star: 50 reps

How to Win a STACK T-Shirt

1. Complete the challenge by Aug. 31
2. Follow STACK on Twitter (@stackmedia)
3. Tweet your results with #STACKChallenge

Watch next week’s STACK Challenge to see if you won.

Get Better

Not an All-Star yet? Get better with exercises and advice from the following articles:

• ‪The 5 Most Effective Squat Exercises
• Squat 101: A How To Guide With Video and Pictures
• The Chain Box Squat Is the Best Exercise You’re Not Doing