The kneel-to-squat challenge claims if you're able to do it, your biological age is under 30. Experts say it's not so simple.

How to complete the 30-day squat challenge First of all — I found a 30-day challenge online. I then got to grips with the basic squat — if I’m going to do this, I’m going to do this properly.

What TikTok’s Viral ‘Shrimp Challenge’ Can Really Tell You About Your Fitness. The latest viral fitness test on TikTok, the shrimp challenge requires strength, mobility, and balance.