What question did this study set out to answer?

To measure forearm muscle oxygen saturation (SmO2) dynamics and assess whether SmO2 predicts time to task failure (TTF) across different loading intensities in elite climbers.

February 20, 2020Scientific ReportsOpen Access

Muscle oxygen dynamics in elite climbers during finger-hang tests at varying intensities

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Authors

AFAndri FeldmannUniversity of Bern DEDaniel ErlacherUniversity of Bern SPSandro PfisterUniversity of Bern

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Implication

Physiological assessment uncovers consistent muscle deoxygenation thresholds during high-intensity finger hangs in elite climbers, highlighting oxygen saturation as a marker of task failure.

Key Points

To measure forearm muscle oxygen saturation (SmO2) dynamics and assess whether SmO2 predicts time to task failure (TTF) across different loading intensities in elite climbers.
Eleven elite climbers performed isometric finger-hang tests on a 23 mm wooden rung using a half crimp grip until voluntary exhaustion.
Participants were tested across four weighted conditions: body weight (BW), body weight +20% (BW +20), body weight −20% (BW −20), and body weight −40% (BW −40).
SmO2, TTF, minimum attainable SmO2 (SmO2 min), and time to reach SmO2 min (TTmin) were recorded and evaluated using Bland-Altman plots with an a priori ±5% equivalency margin.
Minimum SmO2 reached statistically equivalent levels across high-intensity trials: BW (21.6% ± 6.4), BW +20 (24.0% ± 7.0; mean difference vs BW = −2.4%, 95% CI [1.4, −6.2]), and BW −20 (23.0% ± 7.3; mean difference vs BW = −1.3%, 95% CI [2.5, −5.1]).
The lowest intensity condition (BW −40) elicited significantly higher SmO2 min (32.4% ± 8.8; mean difference vs BW = −8.8%, 95% CI [−5.0, −12.6]), failing the equivalency threshold.
Agreement was observed between time to task failure and time to reach minimum SmO2 during higher load conditions, demonstrating that muscle desaturation relates directly to exhaustion at high intensities.

Cite This Study

Feldmann et al. (2020) studied this question.

synapsesocial.com/papers/6a709df9f44fa9f079de4b3c https://doi.org/10.1038/s41598-020-60029-y

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Implication

Physiological assessment uncovers consistent muscle deoxygenation thresholds during high-intensity finger hangs in elite climbers, highlighting oxygen saturation as a marker of task failure.

Muscle oxygen dynamics in elite climbers during finger-hang tests at varying intensities

Discussion

Member takes

Implication

Key Points

Cite This Study

Muscle oxygen dynamics in elite climbers during finger-hang tests at varying intensities

Discussion

Member takes

Implication

Key Points

Cite This Study

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