The Claim
During plantar flexion exercises with the knee fully extended at 180 degrees, the medial head of the gastrocnemius muscle exhibits significantly greater electrical activity and preferential recruitment compared to the soleus and tibialis anterior muscles.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When you point your toes while keeping your knee straight, your inner calf muscle works much harder than the muscles around your shin and ankle. This happens because straightening your knee naturally changes how your body activates different leg muscles during exercises.
See the scientific wording
During plantar flexion exercises, the medial head of the gastrocnemius muscle demonstrates significantly greater electrical activity compared to both the soleus and tibialis anterior muscles when the knee is fully extended at 180 degrees. This position-dependent activation pattern indicates that knee extension preferentially recruits the medial gastrocnemius over other lower leg muscles during resistance training.
What the research says
1 studyStudy: Selective Recruitment of the Triceps Surae Muscles With Changes in Knee Angle
The study confirms that when you perform calf exercises with your legs straight, the main upper calf muscle works much harder than the deeper calf muscle or the shin muscle. This proves that keeping your knees locked specifically targets the top part of your calf.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.