Kojima Chihiro, Morishima Takuma, Ito Reita, Yasunaga Sosuke, Shimogaki Takumi, Hashimoto Takeshi, Isaka Tadao, Iemitsu Motoyuki
Research Organization of Science and Technology, Ritsumeikan University, Shiga, Japan.
Faculty of Liberal Arts and Sciences, Chukyo University, Nagoya, Japan.
Front Physiol. 2025 May 15;16:1534668. doi: 10.3389/fphys.2025.1534668. eCollection 2025.
The present study investigated blood and salivary lactate concentrations with or without active recovery following intensive exercise. Seven men and four women were randomly assigned to two trials consisting of a control (CON) trial and an active recovery (AR) trial separated by at least 1 week. In both trials, participants performed total 30 min of circuit exercise for lower extremities. Afterwards, in the AR trial, participants completed 15 min of light cycling exercise; in the CON trial, participants remained seated during postexercise. Blood and salivary concentrations were measured before and immediately after the circuit exercise, immediately after each trial, and the next morning, using a portable device. Blood lactate concentrations increased significantly immediately after circuit exercise in both trials (AR: 11.9 ± 2.9 mmol/L, CON: 13.4 ± 3.0 mmol/L, < 0.05), and a significant difference was observed between trials, immediately after each trial (AR: 4.2 ± 1.4 mmol/L, CON: 6.9 ± 2.8 mmol/L, < 0.05). In addition, both trials showed salivary lactate concentrations increased significantly following circuit exercise (AR trial: 4.4 ± 3.0 mmol/L, CON trial: 5.4 ± 3.9 mmol/L, < 0.05), and there was a significant difference between trials after the intervention (AR trial: 0.8 ± 0.4 mmol/L, CON trial: 3.1 ± 2.0 mmol/L, = 0.007). In addition, there was a significant correlation between blood and salivary lactate concentrations during the postexercise period (r = 0.856, < 0.001). Thus, salivary lactate concentrations may reflect relative changes in blood lactate concentrations during the postexercise period with active recovery following intensive exercise.
本研究调查了高强度运动后进行或不进行主动恢复时的血液和唾液乳酸浓度。七名男性和四名女性被随机分配到两项试验中，这两项试验包括一个对照（CON）试验和一个主动恢复（AR）试验，两项试验间隔至少1周。在两项试验中，参与者均进行了总计30分钟的下肢循环训练。之后，在AR试验中，参与者完成了15分钟的轻度骑行运动；在CON试验中，参与者在运动后保持坐姿。使用便携式设备在循环训练前、训练结束后即刻、每项试验结束后即刻以及第二天早晨测量血液和唾液浓度。在两项试验中，循环训练结束后即刻血液乳酸浓度均显著升高（AR组：11.9±2.9毫摩尔/升，CON组：13.4±3.0毫摩尔/升，<0.05），并且在每项试验结束后即刻，两组之间观察到显著差异（AR组：4.2±1.4毫摩尔/升，CON组：6.9±2.8毫摩尔/升，<0.05）。此外，两项试验均显示循环训练后唾液乳酸浓度显著升高（AR试验：4.4±3.0毫摩尔/升，CON试验：5.4±3.9毫摩尔/升，<0.05），并且干预后两组之间存在显著差异（AR试验：0.8±0.4毫摩尔/升，CON试验：3.1±2.0毫摩尔/升，=0.007）。此外，运动后期间血液和唾液乳酸浓度之间存在显著相关性（r=0.856，<0.001）。因此，唾液乳酸浓度可能反映了高强度运动后进行主动恢复期间血液乳酸浓度的相对变化。
