The effects of body hydration on perceptual responses during blood flow restriction exercise

Figures

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  FIGURE 1. (a) Study overview. Urine, body mass, and venous blood samples were obtained prior to the blood flow restriction (BFR) exercise intervention. (b) Summary of the BFR walk protocol that included five 3‐min walk intervals at 5 km/h at a 5% incline interspersed with 1‐min of standing rest periods. Gray boxes indicate when BFR was applied during the protocol. Leg pain was determined using the Cook (0–11) scale and the rating of perceived exertion (RPE) was determined using the Borg (6–20) scale. Leg pain and RPE were taken at the mid‐point of each timepoint.

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  FIGURE 2. The influence of hypohydration on perceived exertion and leg pain during the BFR exercise intervention. (a) Rating of perceived exertion (RPE) during the BFR exercise sets. (b) Leg pain during the BFR exercise sets. (c) RPE during the rest periods. (d) Leg pain during the rest periods. Tourniquets were inflated throughout except for Rest 3. Blue and white circles represent mean hydrated and hypohydrated visit values, respectively and error bars represent the standard deviation. Individual responses are shown as gray circles (n = 13‐17/timepoint). Verbal anchors for RPE and leg pain are on the right y‐axis.

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  FIGURE 3. Exploratory analysis of the influence of hypohydration and sex on perceived exertion and leg pain during the BFR exercise intervention, prior to reported adverse responses of four participants leading to the inability to complete the entire exercise protocol. (a) rating of perceived exertion (RPE) during BFR exercise. (b) Leg pain during the BFR exercise. Males are represented as squares and females as triangles. The blue and white symbols represent the mean hydrated and hypohydrated visit values, respectively and error bars represent the standard deviation. Individual male responses are gray squares (n = 10) and individual female responses are gray triangles (n = 7). Verbal anchors for RPE and leg pain are on the right y‐axis.