Changes in human muscle oxygen saturation and mean fiber conduction velocity during intense dynamic exercise - effect of muscular training status

TY - JOUR

T1 - Changes in human muscle oxygen saturation and mean fiber conduction velocity during intense dynamic exercise - effect of muscular training status

AU - Kilen, Anders

AU - Gizzi, Leonardo

AU - Jensen, Bente Rona

AU - Farina, Dario

AU - Nordsborg, Nikolai Baastrup

N1 - CURIS 2012 5200 136

PY - 2012/11

Y1 - 2012/11

N2 - Introduction: In this study we investigated whether an association exists between muscle fiber conduction velocity (MFCV) and local muscle oxygen saturation (StO2) in the superficial part of the latissimus dorsi muscle of runners and swimmers during exhaustive dynamic exercise. Methods: Participants performed arm cranking with increasing intensity until exhaustion. Results: Runners' MFCV was unchanged with increasing arm-cranking exercise intensity, but was higher (P < 0.05) than swimmers' MFCV at the same workload. Swimmers' MFCV increased (P < 0.05) with increasing exercise intensity and reached values at exhaustion similar to those of the runners. StO2 was similar in swimmers and runners at rest and decreased with increasing exercise intensity. StO2 was higher (P < 0.05) at the same workload in swimmers compared with runners. StO2 and MFCV were significantly but very weakly correlated in both swimmers and runners. Conclusion: No association exists between surface MFCV and StO2 in either trained or untrained human skeletal muscle during exhaustive intense dynamic exercise.

AB - Introduction: In this study we investigated whether an association exists between muscle fiber conduction velocity (MFCV) and local muscle oxygen saturation (StO2) in the superficial part of the latissimus dorsi muscle of runners and swimmers during exhaustive dynamic exercise. Methods: Participants performed arm cranking with increasing intensity until exhaustion. Results: Runners' MFCV was unchanged with increasing arm-cranking exercise intensity, but was higher (P < 0.05) than swimmers' MFCV at the same workload. Swimmers' MFCV increased (P < 0.05) with increasing exercise intensity and reached values at exhaustion similar to those of the runners. StO2 was similar in swimmers and runners at rest and decreased with increasing exercise intensity. StO2 was higher (P < 0.05) at the same workload in swimmers compared with runners. StO2 and MFCV were significantly but very weakly correlated in both swimmers and runners. Conclusion: No association exists between surface MFCV and StO2 in either trained or untrained human skeletal muscle during exhaustive intense dynamic exercise.

U2 - 10.1002/mus.23388

DO - 10.1002/mus.23388

M3 - Journal article

C2 - 22996286

SN - 0148-639X

VL - 46

SP - 746

EP - 754

JO - Muscle & Nerve

JF - Muscle & Nerve

IS - 5

ER -