Key result
Moderate-load resistance exercise induced lower subjective hunger ratings immediately after exercise compared to high-load exercise (19.7 vs 47.3 mm; p<0.05).
Why the study?
The study was conducted to compare the effects of moderate-load versus high-load resistance exercise on hunger response, blood lactate, glucose, and autonomic modulation in trained men, and to examine correlations between these parameters.
Does moderate-load resistance exercise reduce subjective hunger compared to high-load resistance exercise in recreationally trained men?
RCT (n=11)
randomized
Does moderate-load resistance exercise reduce subjective hunger compared to high-load resistance exercise in recreationally trained men?
Moderate-load resistance exercise suppresses hunger more effectively than high-load resistance exercise in trained men, though this suppression is not correlated with metabolic variables.
Answers are grounded in this paper and cite their sources.
Moderate-load RE suppresses post-exercise hunger more than high-load; leaves open whether load selection aids appetite control in practice.
The purpose of present study was to compare the effects of moderate-load versus high-load resistance exercise (RE) on hunger response, blood lactate, glucose, and autonomic modulation in trained men, and to examine the correlations between these parameters. For this, 11 recreationally resistance-trained males performed 2 randomized trials: moderate-load (6 sets at 70% 1-repetition maximum (1RM) and a 90-s rest interval between sets) and high-load (6 sets at 90% 1RM and a 180-s rest interval between sets) leg-press exercise until movement failure. The subjective rating of hunger was obtained through a visual analog scale. Glucose and lactate concentration were evaluated at rest, immediately after exercise, and 30 min after exercise. Heart rate variability was recorded at baseline and during recovery (until 30 min after exercise) to assess autonomic modulation. The moderate-load condition induced lower subjective hunger ratings than the strength condition immediately after exercise (19.7 ± 16.6 vs 47.3 ± 27.7 mm), 30 min after exercise (33.6 ± 22.9 vs 58.5 ± 29.9 mm), and 60 min after exercise (43.8 ± 26.6 vs 67.8 ± 27.9 mm) (p < 0.05) and lower area under the curve hunger in relation to the high-load condition (p < 0.006). Moderate-load RE presented greater lactate concentration and induced slower heart rate variability recovery in relation to high-load RE (p < 0.05), but no difference was found in glucose, as well as no correlations between any of the variables investigated. In conclusion, moderate-load RE induced lower subjective hunger ratings, slower recovery of the parasympathetic nervous system, and higher lactate concentration in relation to high-load RE, but the metabolic variables were not correlated with hunger suppression.
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Freitas et al. (2019) conducted an RCT in Healthy volunteers (n=11). Moderate-load resistance exercise vs. High-load resistance exercise (6 sets at 90% 1RM, 180-s rest interval) was evaluated on Subjective rating of hunger immediately after exercise (mm) (p=< 0.05). Moderate-load resistance exercise induced lower subjective hunger ratings immediately after exercise compared to high-load exercise (19.7 vs 47.3 mm; p<0.05).
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