Selection of Aerobic Exercise Intensity Using Heart Rate Reserve in Stroke Patients.

, Kim, Eun Ju; , Kim, Hong Chae; , Kim, Wan Ho; , Song, Won Woo; , Yang, Ho Cheol; , Kim, Jong Hoon; , Yi, Sook Hee; , Lee, Yong Seok

Original Article

Journal of the Korean Academy of Rehabilitation Medicine 2009;33(3):290-296.

Kim, Eun Ju , Kim, Hong Chae , Kim, Wan Ho , Song, Won Woo , Yang, Ho Cheol , Kim, Jong Hoon , Yi, Sook Hee , Lee, Yong Seok

Department of Rehabilitation Medicine, National Rehabilitation Center, Korea. iriskhc@hotmail.com

뇌졸중 환자의 예비심박수를 이용한 유산소 운동의 강도 선택

김은주, 김홍채, 김완호, 송원우, 양호철, 김종훈, 이숙희, 이용석

국립재활병원 재활의학과

Abstract

Objective
To determine the intensity of aerobic exercise in stroke patients using heart rate reserve (HRR) by comparing maximal oxygen consumption (VO_2max) and VO₂ at % HRR in maximal exercise test of treadmill, arm ergometer and bicycle ergometer.
Method
Twenty nine stroke patients who could walk independently were included. Maximal exercise test using treadmill, arm ergometer and bicycle ergometer was performed. Heart rate, rating of perceived exertion, minute ventilation, oxygen consumption and respiratory exchange ratio were measured through respiratory gas analysis. When the standard criteria for maximal oxygen consumption (VO_2max) was achieved, each test was terminated. We compared the measured VO_2max with the VO₂ at % heart rate reserve (HRR) and figured out the statistically significant % HRR point.
Results
Twenty-four (82.7%), twenty-four (82.7%) and twenty-five (86.2%) patients completed maximal exercise test using treadmill, arm ergometer and bicycle ergometer. Most patients who completed maximal exercise test satisfied the VO_2max criteria with VO₂ plateau at the end of the exercise test (41.3∼48.2%) or RER＞1.0 (79.3∼82.7%) or peak HR＞age-predicted maximal heart rate (APMHR)-10 or peak HR＞70% {208−(0.7×age)} when they took Ղ- blockers (6.8∼13.7%). The differences between measured VO_2max and VO₂ above 60% HRR at treadmill test, 65% HRR at arm ergometer test, 65% HRR at bicycle ergometer test were not statistically significant (p＞0.05).
Conclusion
Exercise above 60% HRR at treadmill test, 65% HRR at arm and bicycle ergometer test can be useful as aerobic exercise intensity in stroke patients. (J Korean Acad Rehab Med 2009; 33: 290-296)

Key Words: Stroke, Exercise test, Heart rate reserve