本研究旨在探討相同訓練量下，不同強度急性阻力健身運動對高齡者反應抑制之影響。本研究採用組內受試者設計，並以對抗平衡方式隨機安排實驗順序。31位高齡者 (平均年齡：68.39 ± 5.58) 參與四種不同情境，分別是低強度阻力健身運動情境 (LIRE) (45% 1-RM, 10 reps, 4 sets)、中強度阻力健身運動情境 (MIRE) (60% 1-RM, 10 reps, 3 sets)、高強度阻力健身運動情境 (HIRE) (75% 1-RM, 12 reps, 2 sets) 與閱讀控制情境 (CON)。參與者於各情境介入後量測停止訊號作業 (stop-signal task) 作為評估反應抑制能力。結果顯示，在停止訊號反應時間方面，三種運動情境皆優於CON，其中MIRE時間明顯短於LIRE與HIRE，然LIRE與HREI無顯著差異。另外，四種情境在GO反應時間、GO反應正確率及抑制機率皆無顯著差異。總結而言，在相同訓練量下，三種不同強度急性阻力健身運動對高齡者反應抑制能力均有正面影響，尤其是中等強度效益最佳。根據上述結果，本研究建議針對高齡者設計急性阻力健身運動處方時，中等強度可能更有助於促進反應抑制。

This study aimed to investigate the effects of volume-matched acute resistance exercise at different intensities on response inhibition in older adults. The present study adopted a within-subjects design with counterbalanced and randomized order. Thirty-one older adults (mean age: 68.39 ± 5.58 years) participated in four sessions: low-intensity resistance exercise (LIRE; 45% 1-RM, 10 repetitions, 4 sets), moderate-intensity resistance exercise (MIRE; 60% 1-RM, 10 repetitions, 3 sets), high-intensity resistance exercise (HIRE; 75% 1-RM, 12 repetitions, 2 sets), and a control session (CON). Participants' response inhibition ability was assessed using the stop-signal task following each session. The results showed that for stop-signal reaction time, all three exercise sessions were superior to CON, with MIRE demonstrating significantly shorter times than both LIRE and HIRE, while no significant difference was observed between LIRE and HIRE. Additionally, no significant differences were found among the four sessions in Go reaction time, Go accuracy, or inhibition probability. In conclusion, under equivalent exercise volume sessions, three different intensities acute RE interventions had positive effects on response inhibition in older adults, with moderate-intensity showing optimal benefits. Based on these findings, the present study suggests that moderate-intensity acute RE may be particularly effective for enhancing response inhibition in older adults.