Kamal Saini | Biomechanics Coach

Scared of losing muscle if you train for HYROX? You probably don't need to be. A 2021 study looked at resistance-trained men who kept lifting while adding 10 weeks of endurance training. Here's what happened: ✅ Better endurance ✅ Better muscle aerobic capacity ✅ No meaningful loss of muscle size ✅ No meaningful loss of strength Even the older lifters improved almost as much as the younger ones. Does this prove cardio never causes muscle loss? No. It's just one small study with only 15 trained men. We need more research before making big conclusions. But it does tell us something important: Well-planned endurance training doesn't automatically eat away your muscle. So if you've been avoiding HYROX, Yodha Race, or any endurance event because you're afraid of losing your gains, the evidence isn't as scary as social media makes it sound. Program smart. Recover well. Eat enough. Keep lifting.