Exercise guide
Knee Tap Sky Reach
- Intermediate
- Compound
- Rep-based
- Back
- Chest
- Lower arms
- Lower legs
- Shoulders
- Upper arms
- Upper legs
- Waist
The Knee Tap Sky Reach is a dynamic full-body movement that improves core stability, shoulder mobility, and coordination by combining a high knee drive with a vertical reach. It effectively engages the obliques and deltoids while challenging balance and lower-body control.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Secondary
Equipment
Setup
- Stand tall with your feet hip-width apart and arms relaxed at your sides.
- Engage your core and maintain a neutral spine with your gaze fixed forward.
- Distribute your weight evenly across both feet to establish a stable base.
How to do it
- Simultaneously drive your right knee toward your chest and reach your left arm straight up toward the ceiling.
- Exhale as you tap your right knee with your right hand, focusing on a strong core contraction.
- Inhale and lower your leg and arm back to the starting position with controlled tempo.
- Repeat the movement on the opposite side, alternating sides in a fluid, rhythmic motion.
Form checklist
- Keep your chest lifted and avoid leaning forward or rounding your back.
- Drive your knee high enough to feel your lower abdominals engage.
- Fully extend the reaching arm to maximize deltoid and oblique activation.
- Maintain a slight bend in the standing leg to protect the knee and improve balance.
Pro tips
- Focus on 'growing tall' through your spine during the reach to maximize the stretch and engagement of the obliques.
- Squeeze the glute of the standing leg at the peak of the movement to enhance single-leg stability.
- Synchronize the tap and the reach to occur at the exact same time for better neuromuscular coordination.
Make it harder
- Perform a calf raise on the standing leg as you reach to increase calf activation and balance difficulty.
- Increase the speed of the transitions to add a cardiovascular element while maintaining strict core control.
Frequently asked
- What muscles does the knee tap sky reach work?
- The knee tap sky reach primarily targets the abs, calves, deltoids, obliques, and pectorals, and also works the rhomboids, serratus anterior, and trapezius as secondary muscles.
- What equipment do you need for the knee tap sky reach?
- The knee tap sky reach requires no equipment — just your body weight.
- Is the knee tap sky reach good for beginners?
- The knee tap sky reach is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.
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