Acute Changes in Carotid Arterial Blood Velocity Immediately after the Cessation of Exercise

Midori Tanaka, Motoaki Sugawara, Yasuo Ogasawara, Kiyomi Niki, Tadafumi Izumi

Abstract

Background and purpose: Changes in hemodynamic parameters following exercise have been widely reported. However, the changes in carotid arterial blood flow have not been well documented. The purpose of this study was to examine acute changes in carotid arterial blood velocity immediately after the cessation of exercise. Methods : Twenty-four young healthy men were registered ( age: 21.3 ± 1.6 years ). The cardiopulmonary exercise test was conducted starting at an initial workload of 20 W and lasting for 2 minutes with a strength ergometer ; thereafter, the workload was increased stepwise by 20 W at 1-minute intervals. Electrocardiogram was continuously monitored. The criteria for the endpoint included increase of heart rate to [(220-age) ×0.8 (bpm)], and achievement of maximum fatigue or the impossibility of continuing exercise. Then cooling down was conducted at 20 W following exercise for 150s. We measured the blood velocity in the carotid artery at 60s and 120s after the cessation of exercise with a Doppler system. The data were analyzed by the repeated measures ANOVA and Bonferroni post test. Results : Reductions in systolic / diastolic blood pressure were significant at 60s and 120s after the cessation of exercise (93 ± 3 / 84 ± 3% , 88 ± 4 / 84 ± 3%, respectively ) compared with the values at the cessation of exercise (100%). The reduction in heart rate was also significant at 60s and 120s after the cessation of exercise (84 ± 7% and 78 ± 7%, respectively ). On the contrary, the blood velocity increased to 121 ± 24% and 116 ± 27% at 60s and 120s after the cessation of exercise , respectively. Conclusions : Immediately after the cessation of exercise, blood pressure and heart rate decreased as previously reported. However, carotid arterial blood velocity increased significantly.

References

  1. Niki, K., Sugawara, M., Chang, D., et al., 2002. A new noninvasive measurement system for wave intensity: evaluation of carotid arterial wave intensity and reproducibility. Heart Vessels; 17: 12-21
  2. DiVasta, A. D., Alexander M.E., 2004. Fainting freshmen and sinking sophomores: cardiovascular issues of the adolescent. Curr Opin Pediatr.;16(4):350-6.
  3. Natarajan, B., Nikore, V. 2006. Syncope and near syncope in competitive athletes. Curr Sports Med Rep; 5(6):300-6.
  4. Vettor, G., Zorzi, A., Basso, C , 2015. Syncope as a Warning Symptom of Sudden Cardiac Death in Athletes. Cardiol Clin; 33(3):423-32. doi: 10.1016/j.ccl.2015.04.010.
  5. Muendel, T., Perry, B.G., Ainslie, P.N., et al., 2015. Postexercise orthostatic intolerance: Influence of exercise intensity. Exp Physiol; 100(8):915-25. doi: 10. 1113/EP085143. [Epub ahead of print].
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Paper Citation


in Harvard Style

Tanaka M., Sugawara M., Ogasawara Y., Niki K. and Izumi T. (2015). Acute Changes in Carotid Arterial Blood Velocity Immediately after the Cessation of Exercise . In - icSPORTS, ISBN , pages 0-0


in Bibtex Style

@conference{icsports15,
author={Midori Tanaka and Motoaki Sugawara and Yasuo Ogasawara and Kiyomi Niki and Tadafumi Izumi},
title={Acute Changes in Carotid Arterial Blood Velocity Immediately after the Cessation of Exercise},
booktitle={ - icSPORTS,},
year={2015},
pages={},
publisher={SciTePress},
organization={INSTICC},
doi={},
isbn={},
}


in EndNote Style

TY - CONF
JO - - icSPORTS,
TI - Acute Changes in Carotid Arterial Blood Velocity Immediately after the Cessation of Exercise
SN -
AU - Tanaka M.
AU - Sugawara M.
AU - Ogasawara Y.
AU - Niki K.
AU - Izumi T.
PY - 2015
SP - 0
EP - 0
DO -