ArticleJournal of neurophysiology2026
Lower leg EMG and H-reflex activity during double-leg hopping and landing.
Article in Journal of neurophysiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
This study aimed to examine generation and modulation of the triceps surae electromyographic (EMG) and H-reflex activity during submaximal- and maximal-height double-leg hopping and during landing. During hopping, flight time that reflects hop height was positively correlated with triceps surae EMG amplitudes during ground contact. The H-reflexes elicited near the moment of ground contact (touchdown) were larger during maximal- than submaximal-height hopping. During maximal-height hopping, the soleus H-reflex was phase-dependently modulated within each individual, with no consistent patterns across individuals, whereas the medial gastrocnemius H-reflex was larger just before touchdown and during ground contact than during midflight, consistently across individuals. During landing, the triceps surae EMG and H-reflexes were strongly suppressed after touchdown. The present results support the link between higher hops and larger triceps surae activity during ground contact, to which the spinal reflexes may contribute. A clear interindividual variability in the soleus H-reflex modulation and a consistent pattern in the medial gastrocnemius H-reflex modulation across hopping cycle may suggest use-dependent shaping of reflex phase-dependent modulation in hopping. H-reflex suppression after touchdown during landing supports the presence of robust task-dependent reflex modulation at the key moments of hopping and landing.
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