Acute Physiological and Perceptual Responses to Rest Redistribution With Heavier Loads in Resistance-Trained Men

Abstract

Chae, S, Hill, DW, Bailey, CA, Moses, SA, McMullen, SM, and Vingren, JL. Acute physiological and perceptual responses to rest redistribution with heavier loads in resistance-trained men. J Strength Cond Res 37(5): 994–1000, 2023—The purpose of this study was to explore the effect of rest redistribution with heavier loads (RR + L) on physiological and perceptual responses in resistance-trained men. Eight men who had back squat (BS) 1 repetition maximum (1RM) to body mass ratio; 1.8 ± 0.2 completed 2 BS exercise sessions in a counterbalanced and a randomized order; RR + L: 4 sets of (2 × 5) repetitions with 90-second interset rest and 30-second intraset rest using 75% BS 1RM and traditional sets (TS): 4 sets of 10 repetitions with 120-second interset rest using 70% BS 1RM. Blood samples were collected before exercise, immediately post exercise, and 5, 15, and 30 minutes post exercise for the analysis of growth hormone (GH), total testosterone (TT), cortisol (C), and blood lactate (BL), whereas rating of perceived exertion (RPE) and heart rate (HR) were measured immediately after each set of the BS exercise. While neither main effect of condition nor interaction existed, there was a significant (p < 0.05) main effect of time point (and set) for GH, TT, C, BL, RPE, and HR. Volume load was greater for RR + L compared with TS (4,074.9 ± 786.7 kg vs. 3,796.3 ± 714.8 kg). In conclusion, RR + L increases volume load by approximately 7% but does not seem to influence GH (g = −0.15), TT (g = −0.09), BL (g = −0.22), RPE (g = 0.14), and HR (g = −0.08) responses. Practitioners may consider using RR + L to increase volume load without increasing acute fatigue responses.

Combined Accentuated Eccentric Loading and Rest Redistribution in High-Volume Back Squat: Acute Stimulus and Fatigue

“…Although creating the greatest total volume load, AEL + RR 5 causes lower BL concentrations after set 3 and 5, 15, and 25 minutes postexercise with an overall ≈20–22% difference compared with other 2 conditions. This indicates that increase in total volume load using eccentric overload seems to influence metabolic stress to a lesser extent than with higher concentric loading (7). In addition, our data demonstrate a synergistic effect of AEL + RR where AEL-elicited metabolic stress can be reduced by RR (13,14,19,28,32–35,39).…”

Effects of Short-Term Creatine Monohydrate Supplementation Combined with Strength Training on the Physical Fitness Characteristics and Muscle Hypertrophy in Junior Women Wrestlers

“…RHR was assessed in beats per minute using the Polar RS400 Heart Rate Monitor following a 10-minute rest period in the supine position, adhering to standard protocols. 27…”

“…26 RHR was assessed in beats per minute using the Polar RS400 Heart Rate Monitor following a 10-minute rest period in the supine position, adhering to standard protocols. 27 To estimate strength 1RM, subjects underwent an 8-to-10-minute warm-up, and the test was conducted under the supervision of a researcher. The 1RM for chest press and leg press was recorded and estimated using the formula proposed by Brzeski.…”