The Claim
Muscle fiber type composition does not determine hypertrophic response to different loading protocols in the triceps surae, as the predominantly slow-twitch soleus (80% type I fibers) and mixed fiber-type gastrocnemius showed similar growth responses to both heavy and light load training.
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.
Different types of muscle fibers in your calf muscles don't affect how much they grow from lifting heavy or light weights, because both the mostly slow-twitch and mixed fiber muscles grew about the same with both types of training.
See the scientific wording
Muscle fiber type composition does not determine hypertrophic response to different loading protocols in the triceps surae, as the predominantly slow-twitch soleus (80% type I fibers) and mixed fiber-type gastrocnemius showed similar growth responses to both heavy and light load training.
What the research says
1 studyThe study tested whether heavy or light weights make different calf muscles grow more based on their fiber types, and found both grew similarly no matter the weight, which matches the claim.
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.