"Your core isn't just your abs!" Eric says. "Deadlifts are great exercises to strengthen that posterior chain. If you're an endurance runner, you need a strong core to support yourself."
- Stand upright holding a pair of medium-weight dumbbells in each hand, arms at your sides, with your knees slightly bent.
- Keeping your arms straight and knees slightly bent, slowly bend at the hips (not your waist), and lower the weights as far as possible without rounding your back, which should remain straight.
- Now squeeze your glutes to slowly pull yourself up (don't use your back).
- Do three sets of 12 reps.