The Claim
In healthy adult women, walking at 1.5 m/s compared to 1.0 m/s is associated with a 56–132% increase in electromyography (EMG) amplitude across ankle and knee flexor and extensor muscles, including a 100% increase in soleus and 133% in lateral gastrocnemius activity, while the temporal pattern of muscle activation remains unchanged; this universal increase in muscle activity supports greater joint motion and propulsive force generation required for faster locomotion.
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 healthy women walk faster (about 3.4 mph instead of 2.2 mph), their leg muscles work a lot harder—some muscles more than double their activity—but the timing of how they fire stays the same.
See the scientific wording
In healthy adult women, walking at 1.5 m/s compared to 1.0 m/s is associated with a 56–132% increase in electromyography (EMG) amplitude across ankle and knee flexor and extensor muscles, including a 100% increase in soleus and 133% in lateral gastrocnemius activity, while maintaining the temporal pattern of muscle activation. This universal increase in muscle activity supports greater joint motion and propulsive force generation required for faster locomotion.
What the research says
1 studyThe study found that walking faster increases leg muscle activity, especially in calf muscles, just like the claim says, and the timing of muscle use stays the same.
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.