Connective-Tissue Minimum Effective Dose
Use brief loading bouts and recovery gaps to maximize adaptation with less wear
- Difficulty
- Easy
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 98%
Baar describes connective-tissue cells as responding strongly to a short loading signal and then rapidly becoming unresponsive. In engineered ligaments, changing stretch magnitude did not materially change the growth signal, while extending the duration showed that the signal rose and then faded. His practical dose is about 10 minutes of activity, often organized as 10-second holds followed by 50 seconds of rest, for roughly 100 seconds of total tension. After that, further work contributes more wear than useful signaling. The tissue then enters a refractory period; Baar reports that waiting about eight hours permits another productive bout. The method separates force-transfer development from the heavier or more dynamic work used to train muscle and skill.
Origin
Baar developed the dosing model while testing how different stretch magnitudes and durations affected engineered ligaments, then connected it with bone-loading research and climbing practice.
Core principles
- 01Connective-tissue cells stop responding to a continuous loading signal after roughly 10 minutes
- 02Small loads can produce the adaptation signal when tension reaches the tissue
- 03Additional work after the signal saturates adds wear without adding the same benefit
- 04Allow roughly eight hours before repeating the loading stimulus
How to run it
- 1
Select the tissue and position
Choose an exercise position that creates clear tension through the tendon or ligament you want to train without requiring a dynamic movement.
Pro tip A partial-bodyweight hold can be sufficient when it loads the intended tissue.
Watch out Do not confuse a harder effort with a better connective-tissue signal.
- 2
Apply brief holds
Use short isometric holds, such as 10 seconds under tension followed by 50 seconds off, when the tissue is healthy.
Pro tip Aim to feel tension through the tissue rather than maximal strain.
Watch out An injured or mature scar may require the longer-hold protocol rather than short holds.
- 3
Stop at the signal ceiling
End the targeted loading after about 10 minutes, once roughly 100 seconds of tension has accumulated.
Pro tip Keep sport practice separate in your mind from the targeted connective-tissue dose.
Watch out Continuing for hours does not keep increasing the same adaptation signal.
- 4
Respect the refractory period
Wait about eight hours before delivering another dedicated loading bout to the same system.
Pro tip A morning-and-evening schedule naturally creates the required gap.
Watch out Repeating the stimulus too soon may add work without restoring the response.
- 5
Pair complementary stimuli
Use the brief holds to develop force transfer while sport, maximal holds, or resistance training develops neural drive, muscle, and skill.
Pro tip Treat these as complementary adaptations rather than interchangeable workouts.
Watch out Connective-tissue loading does not replace all other performance training.
In the wild
Climber Emil Abrahamsson used roughly 10-minute hangboard sessions built around 10 seconds on and 50 seconds off. Baar explains that the holds supplied the force-transfer stimulus that dynamic climbing was missing.
→ Ferriss reports major gains in Abrahamsson's maximum hanging performance, while Baar attributes the improvement to greater force-transfer capacity.
Baar says Abrahamsson's brother, who had many injuries, used the short protocol twice daily with the sessions separated by the tissue's recovery period.
→ Baar reports that his hands became healthy enough to climb.
Common mistakes
Turning signal into wear
Extending a targeted connective-tissue session long after the cells stop responding adds wear without proportionate signaling.
Assuming heavier is always better
Baar's engineered ligaments produced similar adaptation signals across markedly different stretch magnitudes.
Repeating the dose too soon
The system needs a refractory period before another bout can produce the full signal.
Is it for you?
Best for
Athletes and active people who want to strengthen tendons, ligaments, cartilage, or bone alongside their normal training.
Not ideal for
Acute or repaired injuries that have not been cleared for loading by an appropriate medical professional.
From the transcript
“The tendons stopped getting the signal to adapt at 10 minutes.”
“If I give you 10 minutes of loading that is optimized for those connective tissues, whether it's tendon, ligament, cartilage, or bone, I can get…”
“You wait 8 hours, you can do it again.”
From the episode
#797: Dr. Keith Baar, UC Davis — Simple Exercises That Can Repair Tendons (Tennis Elbow, etc.), Collagen Fact vs. Fiction, Isometrics vs. Eccentrics, JAK Inhibitors, Growth Hormone vs. IGF-1, The Anti-RICE Protocol, and How to Use Load as an Anti-Inflammatory
Keith Baar