Jacked Athlete Podcast Lateral Gastrocnemius in Achilles Tendinopathy with Gabriel Fernandes
Dec 8, 2025
In this talk, physiotherapist Gabriel Fernandes delves into his pioneering research on the lateral gastrocnemius and its surprising role in Achilles tendinopathy. He reveals how cortical inhibition affects muscle endurance, painting a vivid picture of altered muscle coordination under fatigue. Practical insights such as specific rehabilitation strategies, foot positioning for optimal muscle activation, and the nuances of calf muscle atrophy provide listeners with actionable takeaways. Gabriel also explores innovative methods like neuromuscular stimulation to bolster muscle activation.
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Cortical Inhibition Tied To Endurance Loss
- Gabriel Fernandes found increased cortical inhibition in runners with Achilles tendinopathy linked to bilateral endurance deficits.
- He observed no difference in peak isometric force despite the increased inhibition.
Lateral Gastrocnemius Shows Altered Neural Drive
- Motor unit analysis showed the lateral gastrocnemius failed to increase firing rate with force unlike medial gastrocnemius and soleus.
- This suggests altered neural drive specifically affecting the lateral gastrocnemius in tendinopathy.
Multiple Studies Point To Lateral Gastroc Role
- EMG/biomechanical modeling from other groups found a 28% lower lateral gastrocnemius contribution to plantarflexion in tendinopathy.
- Multiple studies converge on lateral gastrocnemius having an atypical role in Achilles patients.