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Purpose <p>This study investigated the change in mitochondrial capacity and <i>V</i>O<sub>2</sub>max in elite triathlon, cycling, and Greco-Roman wrestling athletes over a 28-day training period.</p> Methods <p>Sixteen elite athletes (23 ± 2.5 years; 176 ± 6&#xa0;cm; 76 ± 8&#xa0;kg; 65 ± 6.9&#xa0;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. <i>V</i>O<sub>2</sub>max was measured via a treadmill ramp test at the same time points.</p> Results <p>The analyses revealed significant differences between pre- and post-measurements, with significant improvements in the second (Δ<i>τ</i>2 = − 3.4 ± 2.7&#xa0;s, <i>p</i> = 0.001) and third (Δ<i>τ</i>3 = − 5.0 ± 5.1&#xa0;s, <i>p</i> = 0.006) occlusion period. Correlation analyses demonstrated a moderate negative relationship between the first occlusion tau (<i>τ</i>) rate and <i>V</i>O<sub>2</sub>max at pre-test (<i>r</i> = − 0.58, <i>p</i> = 0.02) and an even stronger negative correlation at post-test (<i>r</i> = − 0.62, <i>p</i> = 0.01). Within-subject analysis identified 14 athletes as responders.</p> Conclusion <p>The changes in <i>τ</i> rates indicate significant improvements in mitochondrial capacity over a period of 28&#xa0;days in elite athletes, underscoring the utility of NIRS-derived <i>τ</i> rates for monitoring changes in elite athletes.</p> Graphical abstract <p></p>

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Change in mitochondrial capacity in elite triathletes, cyclists, and wrestlers over a training period of 28 days

  • 期刊论文

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  • 发表日期：

    2025年8月27日

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  • Hannes Bossung,
  • Christian Roth,
  • Florian Netzer,
  • Michael Behringer

摘要

Purpose

This study investigated the change in mitochondrial capacity and VO2max in elite triathlon, cycling, and Greco-Roman wrestling athletes over a 28-day training period.

Methods

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. VO2max was measured via a treadmill ramp test at the same time points.

Results

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 VO2max 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.

Conclusion

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.

Graphical abstract