Tendon Stretch — Single Leg: A Complete Guide
Quick Intro
Tendon Stretch — Single Leg is a reformer Pilates exercise that performs the full-range heel drop and press back to relevé (a full rise onto the ball of the foot) on one leg, with the other leg held in the air or crossed behind the working ankle. Single-leg loading roughly doubles the balance and calf-strength demand and exposes any ankle-stability weakness the two-leg version can hide.
Equipment Needed
A Pilates Reformer is required, since the held-out carriage and the relevé position are the mechanism this exercise trains against. One foot on the bar is the only contact with it.
Why It Matters
Holding the carriage out on one leg through repeated drops takes more sustained calf and ankle work, and keeping the pelvis and carriage steady through that range is a test on its own. A calf muscle (gastrocnemius) and a deeper calf muscle beneath it (soleus) drive the heel drop and press back to relevé, and a muscle along the front of the shin (tibialis anterior) helps control the ankle through the full range. The front of the thigh (quadriceps, rectus femoris) keeps the working leg extended, the deep core muscle that wraps around the torso like a corset (transverse abdominis) keeps the pelvis stable as that leg works alone and a smaller glute muscle at the side of the hip (gluteus medius) keeps the pelvis level over it.
When to Do It
Tendon Stretch — Single Leg works well once the standard two-leg heel drop feels stable, added as the next step in the reformer’s ankle and calf work. Building this pattern into two or three sessions a week is a reasonable target for most people.
Anyone with a current ankle, knee or Achilles issue should get individual guidance before adding this exercise, since balancing and pressing on a single leg places demand on all three.
Getting Ready
A few reps of the standard two-leg version warm up the relevé pattern before one leg takes over alone. Pressing the carriage out on both feet and taking one foot away for a few seconds, before any heel drop, previews the single-leg load.
Step-by-Step Instructions
1. The setup. Lie supine on the carriage, one foot in relevé on the bar, the other leg lifted or crossed behind the working ankle.
2. The drop. Lower the working heel below the bar, feeling the calf lengthen through a stretch.
3. The press. Press back up to relevé using the working leg alone, keeping the pelvis level throughout.
4. The repeat. Continue the drop-and-press on the same leg for the working set, then switch sides.
How Many, How Often
Tendon Stretch — Single Leg is dosed by reps per side, with each drop-and-press on one leg counting as one.
| Level | Where you’re at | What to do |
|---|---|---|
| Beginner | New to balancing on a single leg in relevé | 2 sets of 4 to 6 reps per side |
| Intermediate | The pelvis stays level through a full set on each leg | 2 to 3 sets of 6 to 8 reps per side |
| Advanced | Comfortable controlling a working spring load on one leg | 3 sets of 8 to 10 reps per side |
The pelvis staying level on the working leg matters more here than how far the heel drops, since a pelvis that tips is the clearest sign the balance has already given way.
Modifications and Variations
As an easier version, Tendon Stretch performs the same heel drop and press with both feet sharing the load, removing the single-leg demand while the ankle range is learned.
Common Mistakes to Avoid
Letting the pelvis tip toward the lifted leg. Allowing the hips to drop or twist to one side as the working leg presses turns a controlled drop into an uncontrolled sway. Keeping the pelvis level and square holds the balance steady through the full range.
Rushing the drop before the working leg feels secure. Lowering the heel quickly before the working leg feels settled skips the control this single-leg version depends on. A brief pause at the top to find that balance first pays off through the rest of the rep.
Letting the working knee cave inward during the press. Allowing the knee to drift toward the midline as the leg presses back to relevé shifts strain away from the calf and onto the joint. Keeping the knee stacked over the ankle protects it through the full press.
After Your Set
A calf stretch against the foot bar, one heel reaching down at a time, releases the muscles that just worked through the single-leg drops. A gentle ankle circle on each side eases out any tightness the balance work left behind.
Going Deeper
This version follows once the two-leg heel drop feels stable, since taking one leg away puts the whole spring load through a single calf and ankle. As fatigue builds through a set, the pelvis tends to tip toward the lifted leg well before the calf feels weak. Stopping there and resting builds single-leg control faster than finishing the set crooked.
Someone new to this exercise generally holds the balance well enough for a short set within the first few sessions, then adds reps toward a fuller set over the following few weeks.
How to Know You’re Improving
- A pelvis that stays level throughout the drop-and-press on either leg
- A working knee that stays stacked over the ankle rather than caving inward
- A brief settled pause at the top before each drop begins
- A rep count per side that increases while the level-hip position stays clean
A pelvis that stays level beside the lifted leg matters more than how far the heel drops.
Muscles Worked
- Gastrocnemius (a calf muscle, driving the heel drop and press back to relevé)
- Soleus (a deeper calf muscle beneath the gastrocnemius, driving the heel drop and press back to relevé)
- Tibialis Anterior (a muscle along the front of the shin, helping control the ankle through the full range)
- Rectus Femoris (one of the quadriceps at the front of the thigh, keeping the working leg extended)
- Transverse Abdominis (a deep core muscle that wraps around the torso like a corset, keeping the pelvis stable as one leg works alone)
- Gluteus Medius (a smaller glute muscle at the side of the hip, keeping the pelvis level over the working leg)
FAQ
Why is the single-leg version so much harder than the standard Tendon Stretch? Removing one leg from the base of support roughly doubles the calf-strength and balance demand on the leg that remains, exposing any left-right difference the two-leg version can otherwise hide.
What changes from the standard Tendon Stretch? Only the number of legs. The heel drop and press are those of Tendon Stretch, with one leg carrying the load.
Is some calf or ankle fatigue after this exercise normal? Yes, fatigue through the working calf and ankle after a full set on each side is expected. Pain that’s sharp and stays fixed in the Achilles is a different signal, one worth a pause and a conversation with a doctor or physical therapist if it doesn’t settle.
Does the two-leg heel drop need to be stable first? Yes, a stable two-leg heel drop comes first, since the single-leg version only adds value once that pattern is in place.
How often should the single-leg Tendon Stretch be practiced? A couple of sessions a week is plenty once the two-leg version is solid, since the ankle’s stabilizing muscles need recovery time just as much as the calf does.
Related to Tendon Stretch as the easier version performed with both legs sharing the load.