Lucas Mason oversees strength and conditioning for 15 sports at LeTourneau University. He's the only full-time S&C coach. Here's how he makes the impossible math work.

The Gist:  A new study suggests the Countermovement Rebound Jump (CMRJ)  is a powerful tool for detecting fatigue in American Football players. By combining a standard jump with a reactive second hop, it captures neuromuscular fatigue faster than traditional methods. But for coaches of sports that don't involve regular jumping—like cycling, swimming, or distance running—there are some critical limitations to consider before adding this to your testing battery. What is the CMR

Introduction: Why This Research Matters In the high-stakes world of professional sports, specifically Rugby Union, managing the delicate balance between training load and recovery is critical. Preseason is notoriously brutal, often involving 2–4 sessions a day with loads significantly higher than the in-season norm. To prevent overtraining and injury, practitioners routinely use the Countermovement Jump (CMJ) to monitor Neuromuscular Fatigue (NMF). However, there is a problem