The short version
- Tendons adapt more slowly than muscles. Feeling ready is not the same as being ready.
- Pain is information: watch how it behaves during, after and the next morning.
- Your treating clinician’s plan comes first. This lesson is education, not rehab.
I tore my Achilles tendon. I started rebuilding on my 35th birthday, September 11, 2026, and I’m documenting the rebuild publicly in The Rebuild. I am a coach, not your clinician, so this lesson won’t give you a protocol. It gives you the principles I’m living by, and the questions worth asking the person treating you.
What the Achilles does
The Achilles is the largest tendon in the body. It connects your calf muscles to your heel bone, and it works every time you walk, climb stairs, run or jump. According to the American Academy of Orthopaedic Surgeons, tears can be partial or complete. They are treated with or without surgery depending on the person and the injury, and full recovery can take many months.
If you ever feel a sudden pop or a kick-like pain in the back of your heel and can’t push up onto your toes, see a doctor promptly. That is not a “walk it off” moment.
Principle 1: tendons are patient tissue
Muscles adapt relatively quickly. Tendons are slower, and they respond best to load that is built up gradually over weeks and months. The dangerous moment in many rebuilds isn’t the first week. It’s when you start feeling good, your muscles are ready, and the tendon isn’t. Boring and consistent beats heroic and occasional.
Principle 2: pain is information, not a dare
Clinicians often ask you to notice how pain behaves, not only whether it exists. Questions to bring to your appointments:
- How much discomfort during an exercise is acceptable in my plan, if any?
- What should I do if it’s worse the next morning?
- Which signs mean stop and call you: swelling, a new limp, sharp pain or a pop?
- What daily activity counts as load right now: standing, walking, stairs, driving?
Principle 3: daily life is already load
Standing at work and walking around the house load the tendon too (Lesson 2). On a long standing day, the smart move may be less extra work, not more. Your clinician can help you count it.
Principle 4: protect the rest of you
A lower-leg injury doesn’t switch off the rest of your body. Upper-body work, core work, mobility for the hips and upper back, and good nutrition can all keep going in ways your clinician approves. That helps more than you might expect. It keeps you moving, keeps the habit, and keeps your head right.
How I am structuring my week
- Follow the treating plan first, exactly as written. Nothing on this site replaces it.
- Log every session: what I did, how the tendon felt during, after, and the next morning.
- Train what is cleared: upper body, core and hips, within the limits I’ve been given.
- Eat for repair: enough total energy and enough protein (Lesson 11), every day.
- Sleep 7+ hours. Recovery happens there.
- Change one thing at a time, so if something flares I know why.
Common mistakes
- Revenge training: doing extra because you feel behind.
- Testing the tendon with jumps or sprints “just to see.”
- Copying someone else’s rehab timeline from the internet.
- Undereating while injured. Healing tissue needs energy and protein.
Do this today (5 minutes)
If you’re rebuilding from anything, write down three things: what your clinician has cleared, what is not cleared yet, and one question for your next visit. If nothing has been cleared, the job today is rest and good food.
Questions people ask
How long does an Achilles tear take to heal?
It varies widely with the injury, the treatment and the person. AAOS notes that full recovery can take many months. Your treating clinician is the right person to set expectations for your situation.
Can I work out with an Achilles injury?
Often you can train other parts of the body, like the upper body, core and hips, in positions that protect the leg, but only within what your treating clinician has cleared. Don’t load the injured tendon on your own.
What should I eat to help a tendon heal?
No single food heals a tendon. Eating enough total energy, enough protein (Lesson 11) and plenty of fruit and vegetables supports recovery generally. Ask your clinician before adding supplements.
Will you share your rehab exercises?
I’ll share what I’m doing and how it feels in The Rebuild journal, as my story, not as a plan for you. Every injury and every clinician’s plan is different.
Sources
- American Academy of Orthopaedic Surgeons, OrthoInfo. Achilles tendon rupture (tear).
- Rio E et al. Isometric exercise induces analgesia and reduces inhibition in patellar tendinopathy. Br J Sports Med, 2015.
- U.S. Department of Health and Human Services. Physical Activity Guidelines for Americans, 2nd edition.
Education only. Not medical advice. Confirm with your clinician.