title: The effects of resistance exercise with and without different degrees of blood-flow restriction on perceptual responses.
abstract: The aim was to compare exercise with and without different degrees of blood-flow restriction on perceived exertion (RPE) and discomfort. Participants were assigned to Experiment 1, 2, or 3. Each completed protocols differing by pressure, load, and/or volume. RPE and discomfort were taken before and after each set. For pressure and RPE, the 20% one repetition maximum (1RM) blood-flow restriction conditions were affected by increasing the pressure from 40% to 50% blood-flow restriction (~12 vs. ~14). This did not appear to happen within the 30% 1RM blood-flow restriction conditions or the higher pressures in the 20% 1RM conditions. The similar RPE between 20% and 30% 1RM to failure was expected given both were to failure. For discomfort, ratings were primarily affected by load at the lowest pressure. Increasing pressure to 50% blood-flow restriction increased discomfort at 20% 1RM (~2.6 vs. ~4). There was a further increase when increasing to 60% blood-flow restriction (~4 vs. ~4.8). The high-load condition had the lowest discomfort, while ratings were highest with 20% 1RM to failure. In conclusion, exercise with blood-flow restriction does not appear to augment the perceptual response observed with low-load exercise to failure.
authors.affiliation: a Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory , The University of Mississippi , University, MS , USA.
authors.forename: Jeremy P
authors.initials: JP
authors.lastname: Loenneke
authors.forename: Daeyeol
authors.initials: D
authors.lastname: Kim
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Fahs
authors.forename: Robert S
authors.initials: RS
authors.lastname: Thiebaud
authors.forename: Takashi
authors.initials: T
authors.lastname: Abe
authors.forename: Rebecca D
authors.initials: RD
authors.lastname: Larson
authors.forename: Debra A
authors.initials: DA
authors.lastname: Bemben
authors.forename: Michael G
authors.initials: MG
authors.lastname: Bemben
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D007866:Leg / Q000502:physiology; D008297:Male; D010465:Perception; D005082:Physical Exertion / Q000502:physiology*; D012039:Regional Blood Flow; D055070:Resistance Training / Q000379:methods*; D013848:Thigh / Q000033:anatomy & histology / Q000098:blood supply*; D055815:Young Adult
keywords: KAATSU; RPE; discomfort; occlusion training