Our third performance workout focuses on controlling your posture for more efficient running. Are you “stacked” and balanced from foot to head? Do you run with your shoulders up around your ears? Or maybe you’re asking your back and core to handle the load that should really be taken on by your hips and hamstrings. Jay will get you straightened out — and ready to stay that way for the long run — in this series of six exercises.

Remember: Don’t do more than one performance workout per day, and you only need to do two workouts per week to see noticeable gains. It’s always best to do these perfor...