Ustabasioglu, Fethi EmreAgirdemir, Fatma EbruUstabasioglu, FatmaSunal, Baran Serdar2024-06-122024-06-1220230284-18511600-0455https://doi.org/10.1177/02841851221125380https://hdl.handle.net/20.500.14551/19062Background Resistance exercise can be defined as the percentage of maximal strength (%1 repetition maximum) used for a particular exercise. Shear wave elastography (SWE) is a robust and novelty imaging technique that provides information regarding tissue stiffness. Superb microvascular imaging (SMI) is a non-irradiating technique that can provide quantitative measurement of muscle blood flow non-invasively. Purpose To compare the acute effects of low- and high-velocity resistance exercise on stiffness and blood flow in the biceps brachii muscle (BBM) using SWE and SMI. Material and Methods This prospective study included 60 healthy men (mean age=28.9 years; age range=26-34 years). BBM stiffness was measured by using SWE at rest, after low- and high-velocity resistance exercise, and muscle blood flow was also evaluated by SMI. Resistance exercise was performed using a dumbbell with a mass adjusted to 70%-80% of one-repetition maximum. Results The stiffness values increased significantly from resting to high- and low-velocity resistance exercises. There was no significant difference between the elastography values of the BBM after the high- and low-velocity resistance exercise. The blood flow increased significantly from resting to high- and low-velocity resistance exercises. Blood flow increase after low-velocity exercise was significantly higher compared to high-velocity exercise. Conclusion While muscle stiffness parameters and blood flow significantly increased from resting after both high- and low-velocity resistance exercises, blood flow significantly increased after low-velocity exercise compared to high-velocity exercise. This can mean that metabolic stress, an important trigger for muscle development, is more likely to occur in low-velocity exercise.en10.1177/02841851221125380info:eu-repo/semantics/closedAccessBiceps Brachii MuscleResistance ExerciseShear Wave ElastographySuperb Microvascular ImagingMuscle StiffnessMuscle Blood FlowShear-Wave ElastographyBlood-FlowDynamic ExerciseRecommendationsReliabilityAdaptationsHyperemiaResponsesTensionPhaseArticle64415001507Q4WOS:0008545281000012-s2.0-8513825459236112819Q3