case for this for a usc athlete or a professional athletes or a cardiologist? how can we educate the next generation of patients? >> it's changed my practice and it's changed my life in a lot of ways. >> we had our numbers up there the whole time. you and i were -- >> we were in the red zone. we were on overdrive. >> when we come back, one of my most challenging workouts, and technology dr. saxon hopes will change sports forever. [ male announcer ] the lexus command performance sales event has begun. ♪ featuring the lexus gs and is performance lines. because control is the ultimate expression of power. ♪ get great values on your favorite lexus models,