Standing Air Bike

Stand upright with your feet about hip-width apart and your arms by your sides.

Raise your right knee while bending your left arm to bring the left elbow toward the knee.

Gently brace your abdomen to control the trunk rotation.

Your elbow does not need to touch your knee; use a comfortable knee height.

Bringing together the knee and elbow on the same side instead of opposite sides.

Jerking the neck or rounding excessively to reach the knee.

Leaning off the supporting leg or losing balance by moving too fast.

Adding hops instead of controlled alternating knee lifts.