ArticleFrontiers in physiology2026
Intermuscular and intramuscular distributions of sprint-induced thigh muscle activation in male sprinters: a T2-weighted MRI study.
Article in Frontiers in physiology, 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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Abstract
Superior sprint performance is associated with greater activation of the lower-limb muscles, particularly the thigh muscles, during sprinting. T2-weighted magnetic resonance imaging (MRI) is an ideal method for assessing spatial patterns of thigh muscle activation in response to dynamic whole-body movements. In this T2-weighted MRI study, we examined the intermuscular and intramuscular distributions of sprint-induced activation across 13 thigh muscles in male sprinters using a low-volume sprint protocol designed to preserve maximal performance while minimizing fatigue. Specifically, we evaluated intermuscular activation patterns and intramuscular regional differences in thigh muscle activation. Thirty-two well-trained male collegiate sprinters (100-m seasonal best time: 11.02 ± 0.28 s) completed the low-volume sprint protocol consisting of three maximal 60-m sprints with 2-min recovery intervals on an indoor track. T2-weighted MRI scans were acquired before and after the sprint protocol. Intermuscular activation patterns were assessed by comparing the percentage change in T2 across 13 thigh muscles. Intramuscular regional differences were assessed by comparing T2 changes among regions within each muscle. During the low-volume sprint protocol, 60-m sprint times did not differ significantly among the three maximal sprints (
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