3. ALTERNATING STEP-UP

BEGINNER: 10 reps each side (bodyweight) INTERMEDIATE: 10 reps each side (light dumbbells) ADVANCED: 10 reps each side (heavy dumbbells)

Stand facing a box or bench with your feet together. Keep your core braced throughout.

Extend at the hip and knee of your left leg and place your left foot on the box, then push upwards with your right foot to stand on it with both feet.

Exhale, step down and repeat on the other side.