90 Degree Alternate Heel Touch
The 90 Degree Alternate Heel Touch trains controlled side bending, helping improve core control and coordination through slow, precise movement.
90 Degree Alternate Heel Touch
Muscles Worked: 90 Degree Alternate Heel Touch
The 90 Degree Alternate Heel Touch mainly works your abs, especially the side of your midsection that helps you bend and twist your torso. Because your legs stay up at 90 degrees, your deep core has to brace hard to keep your lower back from arching while you reach side to side. Your hip flexors help hold the leg position, but the burn should stay centered around your stomach and obliques. If you feel this more in your neck than your abs, you’re likely losing tension through your trunk rather than keeping your ribs down, and trunk-focused high-effort training is strongly tied to muscle-building signals over time.
Technique and form
How to perform the 90 Degree Alternate Heel Touch
- Begin by lying flat on the floor with your back pressed against the mat, knees bent, and feet flat on the ground about hip-width apart.
- Place your arms straight at your sides, palms facing down, with fingertips pointing toward your heels.
- Engage your core muscles and lift your shoulder blades slightly off the floor while maintaining a neutral spine position.
- Keep your lower back in contact with the floor throughout the entire movement to protect your spine.
- Slowly reach your right hand toward your right heel by rotating your upper body to the right side while maintaining the elevated position.
- Return to the starting position with your shoulders slightly off the ground, then rotate to the left side, reaching your left hand toward your left heel.
- Breathe out as you reach toward each heel, and breathe in as you return to center.
- Continue alternating sides in a controlled manner, focusing on the oblique contraction with each movement rather than how far you can reach.
Important information
- Keep your movements slow and controlled rather than using momentum to reach your heels.
- Maintain the slight elevation of your upper back throughout the exercise to keep your core engaged.
- If you feel any strain in your neck, place your non-working hand behind your head for support.
- Focus on the quality of the contraction in your obliques rather than how far you can reach toward your heel.
Is the 90 Degree Alternate Heel Touch good for muscle growth?
Yes—if your goal is building more visible, better-conditioned abs, the 90 Degree Alternate Heel Touch can help. It is not the best choice for max loading, but it keeps steady tension on the midsection, and hard training that keeps muscles working close to fatigue is a key part of growth over time.
- Long time under tension — Your abs stay switched on for the whole set because your shoulders are off the floor and your legs stay fixed in the air. That constant tension makes this tougher than quick crunch reps where people relax at the bottom.
- Extra work for the side abs — Reaching from heel to heel shifts the challenge toward the muscles that help you bend sideways. That makes it a useful bodyweight option if standard crunches feel too centered and you want more shape through the sides of your waist.
- Hard to cheat with momentum — Since the movement is short and the floor limits swing, you have to create the rep with your trunk instead of throwing your body around. If you want a similar pattern with both hands reaching up instead of side to side, lying toe touch is the closest match.
- Easy to progress without equipment — You can make it harder by slowing the lowering phase, pausing each touch, or adding reps before moving to a tougher variation like 90 degree heel touch. Research on high-load and mixed-load training supports the idea that challenging effort level matters, even when the loading style changes.
Programming for muscle growth
Do 2-4 sets of 12-20 total touches per side with 30-45 seconds rest, 2-4 times per week. Use slow, clean reps and stop when your abs are still doing the work but your lower back wants to take over. Higher reps fit this exercise well because load is limited, so progression should come from better control, longer tension, and more total reps over time.
90 Degree Alternate Heel Touch Variations
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FAQ - 90 Degree Alternate Heel Touch
The 90 Degree Alternate Heel Touch primarily targets the obliques and rectus abdominis (six-pack muscles). Your serratus and transverse abdominis also engage significantly as stabilizers throughout the movement.
To make it easier, reduce your range of motion or perform fewer repetitions at a slower pace. To increase difficulty, add ankle weights, extend your reach further beyond your heels, or incorporate a pause at the point of maximum rotation.
A standard lying leg raise focuses on lifting the legs using the hip flexors and stabilizing with the core. Adding the hip lift shifts more tension to the abs by actively curling the pelvis off the floor, increasing abdominal contraction and reducing reliance on momentum.
Include this exercise 2-3 times weekly as part of your core training routine. It works well in circuits of 30-45 second intervals or for 15-20 repetitions per side, depending on your fitness goals and training split.
The 90 Degree Alternate Heel Touch is generally safer than many core exercises because your back remains supported against the floor. However, if you have existing back conditions, start with modified versions, maintain proper form, and stop if you experience any pain beyond normal muscle engagement.
90 Degree Alternate Heel Touch
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