The effect of rest interval length on metabolic responses to the bench press exercise

Abstract

The purpose of this study was to examine the effects of different rest interval (RI) lengths on metabolic responses to the bench press. Eight resistance-trained men performed 10 randomized protocols [five sets of bench press with 75 or 85% of 1RM for ten (10REP) and five repetitions (5REP), respectively, using different RI (30 s, 1, 2, 3, 5 min)]. Oxygen consumption (VO(2)) was measured during exercise and for 30 min post exercise. For 30-s and 1-min RI: reductions (15-55%) in resistance and volume were observed (set 5 < 4 < 3 < 2 < 1). For 2-min RI: performance was maintained during the first two sets but was reduced by 8-29% during sets 3-5. For 3-min RI: a reduction was observed in volume where sets 4 and 5 were lower than sets 1-3 ( approximately 21%). For 5-min RI: only a reduction in set 5 was observed. Mean VO(2) and ventilation (V (E)) were progressively higher as RI length was shortened. VO(2) area under the curve indicated 10REP > 5REP for all RI except 1-min. Respiratory exchange ratio (RER) was elevated similarly for each protocol. Post exercise, VO(2), V (E), and RER were elevated through 30 min. No differences between RI were observed following 10REP; however, VO(2) after 30-s was higher than 2-, 3-, and 5-min and 1-min was higher than 5-min during 5REP. Fatigue rate was correlated (r = 0.30-0.49) to all metabolic variables. A continuum of performance reductions and metabolic responses were observed. The largest reductions in performance occurred with very short RI (<1 min), and performance was maintained during the first 3-4 sets when 3- and 5-min RI were used.

Resistance exercise at variable volume does not reduce postprandial lipemia in postmenopausal women

“…The resting VO 2 rate was approximately 0.3 L min −1 for both groups and was multiplied by the rate recovery time to produce the equivalent of rest (0.3 L min −1 × 45 min=13.5 L) using an adopted caloric equivalent (CE) of 4.92 kcal L −1 of oxygen consumed for the calculation of EE in EPOC. For the calculation of EE in the RES, an adopted CE of 5.05 kcal L −1 of VO 2 was used, a value for which there is consensus in the literature due to the large increase in CO 2 production that occurs during the RES due to hyperventilation and thus generating RER values above 1 (Ratamess et al 2007). The values were obtained from the sum of the product of the mean VO 2 per minute by the CE in this recovery period, subtracting the total value of the BMR of the participants or the number of kilocalories that the subjects would have consumed during the period of the RES and EPOC had they not performed the RES (Ratamess et al 2007;Thornton and Potteiger 2002).…”

“…For the calculation of EE in the RES, an adopted CE of 5.05 kcal L −1 of VO 2 was used, a value for which there is consensus in the literature due to the large increase in CO 2 production that occurs during the RES due to hyperventilation and thus generating RER values above 1 (Ratamess et al 2007). The values were obtained from the sum of the product of the mean VO 2 per minute by the CE in this recovery period, subtracting the total value of the BMR of the participants or the number of kilocalories that the subjects would have consumed during the period of the RES and EPOC had they not performed the RES (Ratamess et al 2007;Thornton and Potteiger 2002). The HVRE and LVRE showed an average VO 2 of 0.74 and 0.67 L min −1 , respectively; RER for EE of 0.88 and 0.89, respectively; RES of 0.42 and 0.34 L min −1 , respectively; and RER of 0.87 and 0.81, respectively, for EPOC.…”

Effects of very short rest periods on testosterone to cortisol ratio during heavy resistance exercise in men

“…5,8,9 Previous studies have indicated that Ts and Co responses to resistance exercise are affected by several variables such as intensity, volume, duration, rest periods, and muscle mass involvement. 10,11 It is demonstrated that rest interval period between sets would be an important factor that can be manipulated and effects on work performed in subsequent sets, 12,13 the metabolic 14 and hormonal 15---17 responses to exercise training, and training adaptations. 18---20 However, acute response of Co and Ts to different rest interval is not well known.…”

Efeito Da Manipulação Do Sistema De Treinamento Tri-Set Sobre O Desempenho Humano

“…A manipulação da ordem dos exercícios pode afetar o VT ao influenciar o número de repetições realizadas 6,23,28,31,33 e diferentes VT vêm sendo associados a respostas agudas distintas [37][38][39] que podem ocasionar adaptações crônicas ao treinamento, dentre elas a hipertrofia 40 , proposição do sistema TS. No entanto, os resultados do presente estudo demostram que não houve diferença no VT pela manipulação da ordem dos exercícios nas SEQ dos TS.…”