Acute Oxygen Uptake and Resistance Exercise Performance Using Different Rest Interval Lengths

Abstract

The purpose of this study was to examine the relationship between VO2max and acute resistance exercise performance and the acute metabolic effects of exercise sequencing. Seventeen resistance-trained men were tested for VO2max and 1 repetition maximum (1RM) strength. Subjects were randomly assigned to either a group that performed the squat first in sequence followed by the bench press (S; n = 8) or a group that performed the bench press first followed by the squat (BP; n = 9). Each group performed 3 protocols (using 1-, 2-, or 3-minute rest intervals [RIs] between sets in random order) consisting of 5 sets of each exercise with 75% of their 1RM for up to 10 repetitions while oxygen consumption was measured. Total repetitions completed were highest with 3-minute RI and lowest with 1-minute RI. Mean VO2 was significantly highest with 1-minute RI and lowest using 3-minute RI. Analysis of each exercise revealed a tendency (p = 0.07) for mean bench press VO2 to be higher when it was performed after the squat using 1- and 2-minute RIs. VO2max was significantly negatively correlated to 1RM bench press and squat (r = -0.79 and -0.60, respectively) and was significantly correlated to squat repetitions (r = 0.43-0.57) but did not correlate to bench press performance. It seems that VO2max is related to lower-body resistance exercise performance when short RIs are used, and the metabolic response to the bench press is augmented when it follows the squat in sequence using short RIs.

Acute Resistance Exercise Performance Is Negatively Impacted by Prior Aerobic Endurance Exercise

“…These data confirm previous results from our laboratory showing strong negative relationships between V _ O 2 max and lower-body maximal strength (40). In addition, maximal strength was significantly negatively correlated with total repetitions performed in all protocols.…”

“…The responses observed (i.e., highest value seen during the set while decreasing with each minute of rest) were similar to previous reports (data not shown) (40). The HR data for P1-P4 seen in the present study were slightly higher than previous values we reported when 2-3 minutes rest intervals were used (40,41) but not when 1-2 minutes intervals were used (40). Regardless of the mechanism(s) involved, prior AE exercise appears to potentiate the cardiovascular response to subsequent RE.…”

“…In addition, it is likely the greater difficulty observed during RE (as evidenced by reduced repetitions, power, and velocity, and higher RPE values) potentiated the acute HR response. The HR response to RE is dependent on the exercise performed and the volume, intensity, and rest interval length (40). The responses observed (i.e., highest value seen during the set while decreasing with each minute of rest) were similar to previous reports (data not shown) (40).…”

“…The HR response to RE is dependent on the exercise performed and the volume, intensity, and rest interval length (40). The responses observed (i.e., highest value seen during the set while decreasing with each minute of rest) were similar to previous reports (data not shown) (40). The HR data for P1-P4 seen in the present study were slightly higher than previous values we reported when 2-3 minutes rest intervals were used (40,41) but not when 1-2 minutes intervals were used (40).…”

Efeito de diferentes intervalos recuperativos sobre as respostas musculares, sanguíneas e hemodinâmicas

“…É importante que o volume total de exercícios na prática de treinamento resistido com objetivos voltados para hipertrofia e força muscular em indivíduos treinado seja alto, alternando com a intensidade, haja vista que o mesmo pode acarretar maiores ganhos em hipertrofia e força muscular 5,6 , sendo mediado em parte pela relação entre área de secção transversa e força máxima 7,8 . A escolha correta do IR faz toda a diferença, pois é bem estabelecido que ocorre uma redução no número de repetições com consequente diminuição no volume total da sessão de treinamento resistido após IR curto 9,10 , influenciando assim, mais uma vez nos ganhos de força muscular e hipertrofia 11,12 .…”