Moreno Enrique N, Sampson Danielle T, Figueroa Elias C, Jessee Matthew B, Buckner Samuel L
Department of Educational and Psychological Studies, USF Muscle Lab, Exercise Science Program, University of South Florida, Tampa, FL, USA.
Department of Health, Exercise Science and Recreation Management, Applied Human Health and Physical Function Laboratory, University of Mississippi, Oxford, MS, USA.
Eur J Appl Physiol. 2025 Apr;125(4):1049-1059. doi: 10.1007/s00421-024-05655-4. Epub 2024 Nov 18.
This study compared the effects of prescribing an increased number of sets relative to baseline (ITV) to a maintenance of baseline training volume (BTV), in previously trained individuals.
Forty-two adults with more than 6 months of elbow flexion resistance training experience had each arm randomized to either the ITV or BTV condition. Participants performed 2-weekly sessions of unilateral standing dumbbell elbow flexion exercise for 12 weeks, 8 of which were supervised. Muscle thickness of the elbow flexors at 50, 60, and 70% the distance of the upper arm and one repetition-maximum (1RM) strength for the unilateral standing dumbbell elbow flexion exercise were assessed pre- and post-intervention.
For the 50% site, there was no evidence that the changes were different between BTV and ITV [∆BTV vs ∆ITV (cm) = 0.022 (95% CI - 0.096, 0.140)]. However, there was evidence that both conditions observed a greater change compared to the control. For the 60% site, there was no evidence that the changes were different between BTV and ITV [∆BTV vs ∆ITV (cm) = - 0.010 (95% CI - 0.155, 0.96)]. However, there was evidence that both conditions observed a greater change compared to the control. For the 70% site, there was no evidence that the changes were different between BTV and ITV [∆BTV vs ∆ITV (cm) = 0.004 (95% CI - 0.092, 0.101)]. However, there was evidence that both conditions observed a greater change compared to the control. For changes in 1RM, there was evidence that the change was greater in the BTV [∆BTV vs ∆Control (kg) = 1.915 (95% CI 1.219, 2.611)] and ITV [∆ITV vs ∆Control (kg) = 1.780 (95% CI 1.084, 2.475)] conditions compared to control.
Prescribing an increased dose of sets relative to baseline did not augment muscular adaptations when compared to a maintenance of BTV, in recreationally trained individuals. Both training conditions were similarly effective in promoting significant increases in muscle thickness and 1RM strength of the elbow flexors.
本研究比较了在先前受过训练的个体中，相对于基线增加训练组数（递增训练量，ITV）与维持基线训练量（基线训练量，BTV）的效果。
42名有超过6个月肘部屈曲抗阻训练经验的成年人，将其每只手臂随机分配到ITV或BTV组。参与者每周进行2次单侧站立哑铃肘部屈曲运动，共12周，其中8次有监督。在干预前后评估上臂距离的50%、60%和70%处的肘部屈肌肌肉厚度，以及单侧站立哑铃肘部屈曲运动的一次重复最大值（1RM）力量。
在50%处，没有证据表明BTV和ITV之间的变化存在差异[BTV变化量与ITV变化量（厘米）=0.022（95%置信区间-0.096，0.140）]。然而，有证据表明与对照组相比，两种情况都观察到了更大的变化。在60%处，没有证据表明BTV和ITV之间的变化存在差异[BTV变化量与ITV变化量（厘米）=-0.010（95%置信区间-0.155，0.96）]。然而，有证据表明与对照组相比，两种情况都观察到了更大的变化。在70%处，没有证据表明BTV和ITV之间的变化存在差异[BTV变化量与ITV变化量（厘米）=0.004（95%置信区间-0.092，0.101）]。然而，有证据表明与对照组相比，两种情况都观察到了更大的变化。对于1RM的变化，有证据表明与对照组相比，BTV组[BTV变化量与对照组变化量（千克）=1.915（95%置信区间1.219，2.611）]和ITV组[ITV变化量与对照组变化量（千克）=1.780（95%置信区间1.084，2.475）]的变化更大。
在休闲训练的个体中，相对于基线增加训练组数与维持BTV相比，并没有增强肌肉适应性。两种训练条件在促进肘部屈肌肌肉厚度和1RM力量显著增加方面同样有效。
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