By Christopher R.D. Menke, DPM, FACFAS | Double Board-Certified, Foot Surgery & Rearfoot/Ankle Reconstruction | American Board of Foot & Ankle Surgery
Patients frequently come into my office having already read about eccentric heel drop exercises or night splints online before they see me, sometimes having already tried one or both. Most of the time, they tell me the same thing: it made the pain worse, not better. That feedback, heard consistently over years in practice, is the reason this post exists.
Why Two Common Recommendations Can Backfire
A night splint holds the foot in a fixed position, applying a constant, static stretch throughout the night. Eccentric heel drop exercises actively load the tendon while lengthening it, which can meaningfully accentuate the stretch and place additional load on tissue that is already damaged. Based on consistent patient feedback, both tend to aggravate an already injured Achilles tendon rather than help it, whether the injury is mid-portion tendinopathy in the watershed area or insertional tendinopathy at the heel bone.
Understanding the Two Muscles Behind the Achilles Tendon
The Achilles tendon forms from two muscles merging together. The gastrocnemius originates above the knee, so it is only under full tension and actively stretched when the knee is straight. The soleus attaches lower, strictly to the back of the tibia, and is isolated when the knee is bent, since the gastrocnemius is no longer engaged in that position. Properly stretching the calf and Achilles, when stretching is appropriate, requires addressing both positions, knee straight and knee bent, to reach both muscle groups.
When Night Splints Actually Make Sense, and When They Don't
Night splints are not something typically prescribed for Achilles tendinitis. Patient feedback consistently points toward more discomfort rather than relief. A night splint is more appropriately reserved for stretching the heel and Achilles in the context of plantar fasciitis, not for an Achilles tendon that is already injured.
When Eccentric Heel Drop Exercises Actually Make Sense, and When They Don't
Stretching is genuinely useful as part of a pre-activity and post-activity warm-up routine for a healthy, uninjured tendon. Once an injury is present, particularly a chronic one, consistent stretching can aggravate or exacerbate the problem rather than resolve it. Caution is warranted with heel drop exercises specifically when the tendon is acute or already aggravated.
What to Do Instead
Taping is the first-line consideration for an injured Achilles tendon, paired with support such as a compressive ankle brace or sleeve, an orthotic, and supportive footwear to keep the foot stabilized. If symptoms continue to progress despite this, a walking boot allows the tendon to rest and repair by limiting the motion that happens with every single step. Ordinary walking naturally stretches and moves the Achilles tendon, which is exactly why full rest can be difficult to achieve without a boot, and why immobilization sometimes becomes necessary to give a stubborn tendon the chance to actually heal.
Product Note
The Foot and Ankle Kinesiology Therapy Tape, the Ankle Compression Sleeve, and the All Purpose Orthotics support this first-line approach of taping, compression, and stabilization rather than aggressive stretching. [FTC Disclosure: I am the founder and owner of 26 Apothecary. When I reference products available on this site, I have a financial interest in those recommendations.]
The Bottom Line
If Achilles pain is present and not resolving, caution is warranted with night splints and with consistent, aggressive stretching. Neither is the default first step for an already injured Achilles tendon. Taping, compression, and support come first, with a walking boot reserved for cases that continue to progress.
When to See a Foot and Ankle Specialist
Kinesiology tape, orthotics, a gel compression sleeve, heel lifts, and a compression ankle sleeve are reasonable starting points for individuals managing Achilles tendon pain conservatively at home. Evaluation by a foot and ankle specialist is recommended when pain persists, fails to improve, or worsens despite consistent use of these conservative measures.
What to Do Next
Rather than reaching for a night splint or an aggressive stretching routine for an already painful Achilles tendon, starting with taping, compression, and a supportive orthotic and shoe is a more reasonable first step, with a walking boot as the next option if symptoms continue to progress.
Related Reading
- Achilles Tendinopathy: What a Foot Surgeon Recommends Before Anything Else
- Achilles Tendinopathy Recovery: What Conservative Treatment Actually Looks Like
- The Footwear Mistake That Keeps Achilles Tendinopathy From Healing
Frequently Asked Questions
Are eccentric heel drop exercises bad for Achilles tendinopathy?
For an already injured tendon, eccentric heel drops can accentuate the stretch and add load to damaged tissue, often aggravating symptoms rather than helping. Caution is warranted, especially in acute or aggravated cases.
Should I use a night splint for Achilles tendinitis?
Night splints are not typically recommended for an already injured Achilles tendon, since patients consistently report more discomfort rather than relief. They are more appropriately used for plantar fasciitis.
Why does stretching my knee straight versus bent matter for my Achilles?
The gastrocnemius muscle crosses the knee and is stretched with the knee straight, while the soleus muscle stays below the knee and is isolated with the knee bent. Both merge into the Achilles tendon, so complete stretching addresses both positions.
What should I do instead of stretching if my Achilles hurts?
Taping paired with compression, an orthotic, and supportive footwear is a more reasonable first step for an injured Achilles tendon than aggressive stretching or a night splint.
When does a walking boot become necessary for Achilles tendinopathy?
A walking boot is reasonable when symptoms continue to progress despite taping and support, since ordinary walking naturally stretches and moves the tendon, making full rest difficult without immobilization.
About the Author
Christopher R.D. Menke, DPM, FACFAS is a double board-certified foot and ankle surgeon and the founder of 26 Apothecary, a physician-curated line of conservative care products for foot and ankle conditions. He practices at 26 Foot and Ankle in Georgia.