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Exercise-induced fluid shifts are distinct to exercise mode and intensity: a comparison of blood flow-restricted and free-flow resistance exercise

2021; American Physiological Society; Volume: 130; Issue: 6 Linguagem: Inglês

10.1152/japplphysiol.01012.2020

8750-7587

Bryan Haddock, S Hansen, Ulrich Lindberg, Jakob Lindberg Nielsen, Ulrik Frandsen, Per Aagaard, Henrik Larsson, Charlotte Suetta,

Sports Performance and Training

Using muscle functional MRI (mfMRI), this study was able to differentiate the acute physiological responses following three established hypertrophic resistance exercise strategies. Low-load exercise protocols performed to failure, with or without blood flow restriction, resulted in larger changes in R 2 (i.e. greater T 2 -shifts) with a slow rate of return to baseline indicative of myocellular fluid shifts. These data were cross evaluated with interleaved measures of macrovascular blood flow, water diffusion, muscle cross sectional area (i.e. acute macroscopic muscle swelling), and intracellular water fraction measured using MRI.