You walk into class 2 minutes late, do some half-hearted arm circles, and then immediately start rolling.

That's not a warm-up. That's asking for an injury.

Cold muscles tear easier. Research shows structured 10-15 minute warm-ups reduce injury rates by 32%.

But most grapplers skip it because they "don't have time."

You know what takes longer than 10 minutes? Recovering from a torn ligament for 6 months.

Do the warm-up. Your future self will thank you.