Bossung Hannes, Roth Christian, Netzer Florian, Behringer Michael
Department of Sports Medicine and Exercise Physiology, Institute of Sport Sciences, Goethe University, Frankfurt am Main, Germany.
Private Department for Venous Surgery, Munich, Germany.
Eur J Appl Physiol. 2025 Aug 27. doi: 10.1007/s00421-025-05941-9.
This study investigated the change in mitochondrial capacity and VOmax in elite triathlon, cycling, and Greco-Roman wrestling athletes over a 28-day training period.
Sixteen elite athletes (23 ± 2.5 years; 176 ± 6 cm; 76 ± 8 kg; 65 ± 6.9 ml/min/kg) participated. Mitochondrial capacity was assessed before (pre) and after (post) a 28-day training period by measuring the increase in deoxygenated hemoglobin (HHb) in the m. vastus lateralis during three consecutive one-minute rapid cuff occlusion periods using near-infrared spectroscopy. VOmax was measured via a treadmill ramp test at the same time points.
The analyses revealed significant differences between pre- and post-measurements, with significant improvements in the second (Δτ2 = - 3.4 ± 2.7 s, p = 0.001) and third (Δτ3 = - 5.0 ± 5.1 s, p = 0.006) occlusion period. Correlation analyses demonstrated a moderate negative relationship between the first occlusion tau (τ) rate and VOmax at pre-test (r = - 0.58, p = 0.02) and an even stronger negative correlation at post-test (r = - 0.62, p = 0.01). Within-subject analysis identified 14 athletes as responders.
The changes in τ rates indicate significant improvements in mitochondrial capacity over a period of 28 days in elite athletes, underscoring the utility of NIRS-derived τ rates for monitoring changes in elite athletes.
本研究调查了优秀铁人三项运动员、自行车运动员和古典式摔跤运动员在28天训练期间线粒体能力和最大摄氧量（VO₂max）的变化。
16名优秀运动员（23±2.5岁；身高176±6厘米；体重76±8千克；VO₂max为65±6.9毫升/分钟/千克）参与了研究。在28天训练期开始前（训练前）和结束后（训练后），通过近红外光谱法测量股外侧肌在连续三个一分钟快速袖带阻断期内脱氧血红蛋白（HHb）的增加量，以此评估线粒体能力。在相同时间点通过跑步机斜坡试验测量VO₂max。
分析显示训练前后测量结果存在显著差异，在第二个阻断期（Δτ₂ = -3.4±2.7秒，p = 0.001）和第三个阻断期（Δτ₃ = -5.0±5.1秒，p = 0.006）有显著改善。相关性分析表明，在测试前，第一个阻断期τ率与VO₂max之间存在中度负相关（r = -0.58，p = 0.02），在测试后相关性更强（r = -0.62，p = 0.01）。受试者内分析确定14名运动员为反应者。
τ率的变化表明优秀运动员在28天内线粒体能力有显著改善，强调了近红外光谱法得出的τ率在监测优秀运动员变化方面的实用性。
