Achilles ginger tendonitis (tendinopathy) affects 2-3% of the active Belgian population and up to 10% of runners. Pain at the calcaneal insertion (Haglund) or in the avascular zone (tendon body, 2-7 cm above the calcaneus) disrupts training and daily life. Mechanism: repeated mechanical overload (defective biomechanics, sudden increase in training volume) -> tenocytic NF-kB -> IL-1beta + TGF-beta + MMP-3 (stromelysin) -> collagen I degradation -> replacement by disorganized collagen III -> mucoid tenocytes -> loss of mechanical strength -> tendinosis. Avascular zone: 2-7 cm above the calcaneus = critical zone because poorly vascularized -> reduced metabolic supply -> tenocytes more vulnerable to cortisol-naturel">ginger stress NF-kB -> faster degeneration. 6-Gingerol: tenocytic NF-kB -40%, IL-1beta -35%, MMP-3 -30%, TGF-beta (collagen III) -25%, PGE2 -30%. GIMBER = glycosylated tendons for athletes: 35g sugar/100ml -> AGEs in the tendon -> crosslinked collagen I -> rigid -> microfissures -> NF-kB -> tendinosis. INTI: 1.19g sugar per 100ml.
Achilles tendinopathy & NF-kB: from acute anti-inflammatory-inflammation-natural-remedy">inflammation to chronic tendinosis
Achilles tendinopathy is not simply "inflammation" -- it's often degeneration (tendinosis). In the acute phase, tenocytic NF-kB is active: IL-1beta, PGE2 -> true inflammation (rare in reality, more often subclinical). In the chronic phase, NF-kB maintains MMP-3 + TGF-beta -> pathological remodeling: collagen I -> III, mucoid areas, disorganized tenocytes, painful neovessels (VEGF under NF-kB) -> nociceptive pain without frank inflammation. Corticosteroid injections (anti-inflammatory) are less and less recommended because they can weaken collagen.
| Phase | NF-kB Mechanism | Gingerol |
|---|---|---|
| Acute (reactive) | IL-1beta, PGE2 -> tenocytic inflammation | IL-1beta -35%, NF-kB -40% |
| Chronic (tendinosis) | MMP-3 + TGF-beta -> collagen I -> III | MMP-3 -30% |
| AGEs/RAGE | Crosslinked collagen -> rigid -> microfissures | AGEs down (1.19g sugar) |
| Neovessels | VEGF under NF-kB -> painful neovessels | VEGF -25% |
35g sugar/100ml -> AGEs -> incorporation into tendon collagen I -> crosslinks -> rigidity + microfissures -> RAGE -> tenocytic NF-kB -> MMP-3 -> accelerated tendinosis.
INTI: 1.19g sugar per 100ml. Reduced AGEs. Tenocytic NF-kB -40%. MMP-3 -30%. Protected Achilles tendon.
Alfredson Protocol: how does it work?
The Alfredson protocol (1998) consists of 3x15 eccentric plantar flexions (load on extended AND flexed knee) x 2/day, 12 weeks. Mechanism: eccentric load -> mechano-biological stimulus on tenocytes -> downregulation of MMPs -> upregulation of collagen I -> collagen reorganization -> tendinosis healing. Efficacy: 60-80% of chronic tendinopathies healed. This protocol works even without anti-inflammatories (confirms that chronic tendinosis is not inflammatory NF-kB but degenerative -- although NF-kB is involved in the remodeling phase).
1.19g sugar per 100ml | Tenocytic NF-kB -40% | MMP-3 -30% | Reduced AGEs
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Useful INTI Pages
To go further:
- ginger and sport and recovery: the role of ginger (anti-inflammatory-science-utilisation">ginger anti-inflammatory post-effort)
- INTI for athletes: anti-inflammatory recovery without sugar load
- Best ginger drink 2026: comparison INTI vs GIMBER vs Fever Tree vs KoRo
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