Evidence map›Paper›PMID 42228635›Full record

ArticleJournal of neurophysiology2026

Lower leg EMG and H-reflex activity during double-leg hopping and landing.

William B Haug, Viswanathan Ramakrishnan, Aiko K Thompson

Abstract read
In one paragraph

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.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

William B HaugSchool of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, United Kingdom.ORCID 0009-0009-2100-6026
Viswanathan RamakrishnanDepartment of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, United States.ORCID 0000-0002-4098-0539
Aiko K ThompsonDepartment of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, Charleston, South Carolina, United States.ORCID 0000-0001-9486-8537

Funding

Subproject Title: Clinical Research Education, Mentoring and Career Development CoreU54GM104941 · NIGMS · UNIVERSITY OF DELAWARE · PI LEE M PACHTER · 2013 to 2026
$60.5M
Training and DisseminationP41EB018783 · NIBIB · WADSWORTH CENTER · PI Yi Chen · 2014 to 2026
$15.4M
Techniques DevelopmentP2CHD086844 · NICHD · MEDICAL UNIVERSITY OF SOUTH CAROLINA · PI BOGER, HEATHER A · 2015 to 2024
$12.7M
Changing a Reflex to Improve LocomotionR01NS069551 · NINDS · MEDICAL UNIVERSITY OF SOUTH CAROLINA · PI THOMPSON, AIKO · 2010 to 2014
$1.4M
HHS | NIH | National Institute of Biomedical Imaging and Bioengineering (NIBIB) P41-EB018783HHS | NIH | National Institute of General Medical Sciences (NIGMS) U54-GM104941HHS | NIH | National Institute of Neurological Disorders and Stroke (NINDS) NS069551NIBIB NIH HHS P41 EB018783NICHD NIH HHS P2C HD086844NIGMS NIH HHS U54 GM104941NINDS NIH HHS R01 NS069551
6 · The paper itself

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.

Indexed as

H-ReflexLegMuscle, SkeletalAdultElectromyographyFemaleHumansMaleYoung Adultflight timegastrocnemiussoleustask-dependent reflex modulationvertical two-legged hopping

Identifiers

PMID42228635
PMCPMC13334712

What Socratic holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.