| Autor: |
Xueer Lu, Goulding, Richie P., Mundel, Toby, Schlader, Zachary J., Cotter, James D., Shunsaku Koga, Naoto Fujii, I-Lin Wang, Ziyang Liu, Hao-Yu Li, Hui Wang, Huixin Zheng, Narihiko Kondo, Chin-Yi Gu, Tze-Huan Lei, Faming Wang |
| Předmět: |
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| Zdroj: |
American Journal of Physiology: Regulatory, Integrative & Comparative Physiology; Jun2024, Vol. 326 Issue 6, p567-577, 11p |
| Abstrakt: |
Postexercise reduction in blood pressure, termed postexercise hypotension (PEH), is relevant for both acute and chronic health reasons and potentially for peripheral cardiovascular adaptations. We investigated the interactive effects of exercise intensity and recovery postures (seated, supine, and standing) on PEH. Thirteen normotensive men underwent a V_ O2max test on a cycle ergometer and five exhaustive constant load trials to determine critical power (CP) and the gas exchange threshold (GET). Subsequently, work-matched exercise trials were performed at two discrete exercise intensities (10% > CP and 10% < GET), with 1 h of recovery in each of the three postures. For both exercise intensities, standing posture resulted in a more substantial PEH (all P < 0.01). For both standing and seated recovery postures, the higher exercise intensity led to larger reductions in systolic [standing: -33 (11) vs. -21 (8) mmHg; seated: -34 (32) vs. -17 (37) mmHg, P < 0.01], diastolic [standing: -18 (7) vs. -8 (5) mmHg; seated: -10 (10) vs. -1 (4) mmHg, P < 0.01], and mean arterial pressures [-13 (8) vs. -2 (4) mmHg, P < 0.01], whereas in the supine recovery posture, the reduction in diastolic [-9 (9) vs. -4 (3) mmHg, P = 0.08) and mean arterial pressures [-7 (5) vs. -3 (4) mmHg, P = 0.06] was not consistently affected by prior exercise intensity. PEH is more pronounced during recovery from exercise performed above CP versus below GET. However, the effect of exercise intensity on PEH is largely abolished when recovery is performed in the supine posture. NEW & NOTEWORTHY The magnitude of postexercise hypotension is greater following the intensity above the critical power in a standing position. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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