Photo via Nicholas Rians on Vimeo

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 a T-shirt by tweeting your results with #STACKChallenge.

How long can you maintain a Wall Sit once your legs start shaking and you’re ready to collapse? Learn how to push through the pain, and you’ll start building the endurance and mental toughness you need to stay strong late in games when your opponent is gassed.

For this test, you sit against a wall with your thighs parallel to the floor. Keep your heels flat on the ground (even when your legs start shaking) and your back straight against the wall.

The Challenge

Hold a Wall Sit for as long as possible.

How Do You STACK Up?

Rookie: Under 1:15
Pro: 1:15-2:15
All-Star: 2:15+

How to Win a STACK T-Shirt

1. Complete the challenge by March 2
2. Follow STACK on Twitter (@stackmedia)
3. Tweet your results and include #STACKChallenge

Congratulations to last week’s winner, Blake from Calgary, Alberta, who completed the Timed Plank Challenge with his 9-year-old daughter, Maya!

Get Better

Not an All-Star yet? Get better by incorporating high-rep lower-body exercises into your workout. Start with these:

• Bodyweight Squat
• Single-Leg Squat
• Lunges