Exercise guide
Lean Back Tap Ankle Tap
- Beginner
- Compound
- Rep-based
- Lower legs
- Upper legs
- Waist
This core exercise targets the rectus abdominis and obliques by combining an isometric 'V-sit' hold with dynamic rotational reaching. It builds core endurance and improves rotational stability through the midsection.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Sit on the floor with your knees bent and feet flat on the ground.
- Lean your torso back to approximately a 45-degree angle until you feel your abdominal muscles engage.
- Lift your feet 2-3 inches off the floor, balancing on your sit bones with your spine neutral and chest open.
How to do it
- Exhale as you reach your right hand back to tap your right ankle, rotating your torso slightly to the right.
- Inhale as you return to the starting center position with control, keeping your feet elevated.
- Repeat the movement on the left side, reaching your left hand to your left ankle while maintaining your balance.
- Continue alternating sides at a controlled tempo, ensuring your core remains under constant tension.
Form checklist
- Keep your chest lifted and avoid rounding your shoulders or lower back.
- Maintain the 45-degree lean throughout the entire movement to keep the abs engaged.
- Keep your neck neutral and gaze forward to avoid cervical strain.
- Ensure the movement comes from torso rotation rather than just swinging the arms.
Pro tips
- Imagine 'wringing out' your midsection as you rotate to maximize oblique engagement at the peak of the tap.
- Squeeze your knees and inner thighs together to stabilize the pelvis and better isolate the abdominal wall.
Make it harder
- Straighten your legs into a full V-sit position to increase the lever length and tension on the lower abs.
- Hold a light medicine ball or dumbbell and tap it against the floor near your ankle for added resistance.
Frequently asked
- What muscles does the lean back tap ankle tap work?
- The lean back tap ankle tap primarily targets the abs and obliques, and also works the erector spinae, glutes, and quadriceps as secondary muscles.
- What equipment do you need for the lean back tap ankle tap?
- The lean back tap ankle tap requires no equipment — just your body weight.
- Is the lean back tap ankle tap good for beginners?
- Yes. The lean back tap ankle tap is a beginner-friendly movement and a strong foundation to build on.