| Autor: |
Hyngstrom, Allison S., Nguyen, Jennifer N., Uhrich, Toni D., Wright, Michael T., Gutterman, David D., Schmit, Brian D., Durand, Matthew J. |
| Zdroj: |
Cardiopulmonary Physical Therapy Journal (Lippincott Williams & Wilkins); Jan2023, Vol. 34 Issue 1, p39-50, 12p |
| Abstrakt: |
Purpose: This study examined tissue oxygen saturation (StO2) of the vastus lateralis (VL) muscles of chronic stroke survivors during a graded exercise test (GXT). We hypothesized that the reduction in StO2 will be blunted in the paretic versus nonparetic VL during a maximum effort GXT. Methods: Chronic stroke survivors performed a GXT, and StO2 of the VL in each leg was measured using near-infrared spectroscopy. Twenty-six stroke survivors performed a GXT. Results: At rest, there was no difference in StO2 between the paretic and nonparetic VL (65 ± 9% vs 68 ± 7%, respectively, P =.32). The maximum change in StO2 from rest during the GXT was greater in the nonparetic versus the paretic VL (−16 ± 14% vs −9 ± 10%, respectively, P <.001). The magnitude of the oxygen resaturation response was also greater in the nonparetic versus the paretic VL (29 ± 23% vs 18 ± 15%, respectively, P <.001). VO2 peak was associated with the magnitude of the VL StO2 change during (r2 = 0.54, P <.0001) and after (r2 = 0.56, P <.001) the GXT. Conclusion: During a GXT, there is a blunted oxygen desaturation response in the paretic versus the nonparetic VL of chronic stroke survivors. In the paretic VL, there was a positive correlation between the oxygen desaturation response during the GXT and VO2 peak. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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