GLP-1 Weight-Loss Drugs: Athletes May Lose More Than Weight

Athletes using GLP-1 weight-loss drugs may shed pounds but can see negative effects on performance, including higher resting heart rate and lower HRV; early research suggests fat loss must be balanced with preserved muscle, adequate nutrition, and training, because appetite suppression can trigger energy deficiency (RED-S). The author recommends structured meals, pre-workout fueling, a rough 3:1 carb-to-protein intake, and checking vitamin D and B12 levels, with wearables guiding adjustments. Long-term effects are still unknown, and athletes are helping to build the data.