A practical guide for active people dealing with stubborn tendon pain, drawing on the work of tendon researcher Dr. Keith Barr.
If you love being active, few things are more frustrating than a tendon that just won’t settle down. So many of my clients are runners, lifters, and weekend athletes who feel held back by a nagging ache in the Achilles, knee, or elbow that flares up every time they push. That pain has a name — tendinopathy — and it usually shows up when a tendon is loaded more than it can adapt to, and never given enough recovery to catch up.
The good news is that tendons respond remarkably well to the right kind of loading. Below are the guiding principles I keep coming back to, and the ones Dr. Keith Barr’s research helps explain so clearly. Get these right and you give your tendons the best possible chance to remodel, strengthen, and get you back to what you love.
1. You Don’t Need Heavy Weight — You Need Time Under Load
One of the most freeing findings from Barr’s work is that heavy lifting isn’t what drives tendon repair. What matters is sustained, gentle tension — roughly 100 seconds of total loading per session. A simple protocol looks like this:
- Apply a light load and hold for about 10 seconds.
- Rest for 50 seconds.
- Repeat roughly 10 times (about 100 seconds of total loading).
- Give the tendon 6–8 hours of rest, then repeat the cycle.
That 6–8 hour window matters: it’s the time your tendon needs to respond to the signal, heal, and build back stronger before you ask it to work again.
2. Slow and Steady Beats Fast and Jerky
The single biggest way to set yourself back is a sudden, explosive, or jerky movement — especially when the tendon is already fatigued. That’s when micro-tears (or worse, full-thickness tears) tend to happen. Instead, ease into steady isometric holds. Keep these principles in mind:
- Avoid sudden or explosive loading, particularly when tired.
- Favour slow, controlled isometric holds — steady tension without sudden changes.
- Steady tension spreads the load evenly, reaching the weaker areas that need it most.
3. Don’t Fight the Inflammation — Work With It
It’s tempting to reach for anti-inflammatories at the first sign of swelling, but Barr cautions against overusing them. Inflammation is part of how a tendon heals. Instead of shutting it down, help your body manage it:
- For an inflamed, acute tendon: gentle 5-second isometric squeezes help pump swelling out of the tendon and ease that feeling of tension and tenderness.
- As it becomes chronic: move to longer holds of around 30 seconds to spread load more effectively across the damaged area.
A solid chronic-stage routine might be four 30-second isometric holds with a minute of rest between each — that’s it — followed by 6–8 hours of rest before loading the tendon again, to promote the fastest healing possible.
4. How Long Does It Take?
This is the question I hear most, and the honest answer is that tendons are slow to change. They have a limited blood supply and adapt on their own timeline, not ours. That’s not a reason to lose heart — it’s a reason to be strategic. A few realistic expectations:
- Think in weeks and months, not days. Meaningful remodelling takes time.
- Consistency beats intensity. A little, done well, most days, outperforms occasional hard efforts.
- Some discomfort during a hold can be acceptable, but sharp or lingering pain afterwards is a signal to ease back.
5. When to Get It Checked
These principles are a great foundation, but they’re general guidance — not a substitute for an individual assessment. If your pain is severe, came on suddenly, followed a distinct injury, or simply isn’t improving despite patient loading, it’s worth having the tendon properly assessed. The right starting load and progression differ from person to person, and getting that dialled in early can save you months of frustration.
The Bottom Line
Tendon rehab rewards consistency and patience far more than intensity. Light loads, held steadily and repeated over time, combined with real rest and a firm avoidance of sudden explosive movements, are what let your tendons remodel and grow resilient. Stick with these principles and you give yourself the best chance to stay active, strong, and free from those frustrating setbacks.