Think you have a strong core? This ultimate core test will challenge your endurance, stability, and total-body control. The 1-minute plank challenge is a deceptively simple way to measure your core ...

Think 1 minute sounds easy? Not in this gym. I challenged people to survive 1 brutal minute of exercises—pull-ups, wall sits, plank holds, and more - for a chance to win $5 per challenge. Sounds ...