| Autor: |
D, Kume, S, Akahoshi, J, Song, T, Yamagata, T, Wakimoto, M, Nagao, S, Matsueda, N, Nagao |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
The Journal of sports medicine and physical fitness. 53(3) |
| ISSN: |
0022-4707 |
| Popis: |
This study examined the effect of intermittent breath holding (IBH) on physiological response, including oxygenation in working muscle, to moderate-intensity exercise.Thirteen men performed bicycle exercise for 5 min at 65% of peak oxygen uptake with normal breathing (NB) and with IBH. Muscle oxygenation, concentration changes of oxyhemoglobin (ΔOxy-Hb), deoxyhemoglobin (ΔDeoxy-Hb) and total hemoglobin (ΔTotal-Hb), in the right vastus lateralis were continuously monitored using near-infrared spectroscopy (NIRS). Finger capillary blood samples were taken after exercise for analyzing blood lactate concentration (BLa).NIRS parameters showed acute changes to each BH episode in the IBH condition (Total-Hb and ΔOxy-Hb decreased, ΔDeoxy-Hb increased). Accordingly, in the IBH condition, ΔOxy-Hb was lower (P0.05) and ΔDeoxy-Hb was higher (P0.05) compared to that in the NB condition, whereas there was no difference in ΔTotal-Hb in the both conditions. BLa levels were greater (P0.05) in the IBH condition compare to the NB condition.These results suggest that IBH during moderate-intensity exercise provokes consistent changes in muscle oxygenation, leading to lower tissue oxygenation. Our data also indicate that exercise with IBH induces higher BLa. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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