Use of the Peak Heart Rate Reached During Six-Minute Walk Test to Predict Individualized Training Intensity in Patients With Cystic Fibrosis: Validity and Reliability

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• 作者：Mathieu Gruet ; PhD^a ; Jeanick Brisswalter ; PhD^b ; Laurent Mely ; MD^c ; Jean-Marc Vallier ; MD ; PhD^a ; ^{vallier@univ-tln.fr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Cystic fibrosis ; Physical fitness ; Rehabilitation ; Walking
• 刊名：Archives of Physical Medicine and Rehabilitation
• 出版年：2010
• 出版时间：April 2010
• 年：2010
• 卷：91
• 期：4
• 页码：602-607
• 全文大小：232 K

文摘

Gruet M, Brisswalter J, Mely L, Vallier J-M. Use of the peak heart rate reached during six-minute walk test to predict individualized training intensity in patients with cystic fibrosis: validity and reliability.

Objective

To determine whether the peak heart rate reached during a six-minute walk test (HR_6peak) can be used to predict the heart rate determined at the gas exchange threshold (HR_GET) during a maximal cardiopulmonary exercise test (CPET) in patients with cystic fibrosis (CF). To assess the test-retest reliability of HR_6peak.

Design

Case-control and reliability study.

Setting

CF unit.

Participants

Adults with CF (n=23) and age-matched sedentary subjects (control group, n=17).

Interventions

Not applicable.

Main Outcome Measures

Six-minute walk test, HR_6peak, CPET, and HR_GET.

Results

HR_GET and HR_6peak were not significantly different and were highly correlated in both groups (CF, r=.91, P<.01; controls, r=.81, P<.01). The mean differences (HR_6peak–HR_GET) for patients with CF and control subjects were, respectively, −0.9 beats·min⁻¹ (bpm) and –0.1bpm, with neither significantly different from 0. The limits of agreements were ±11bpm and ±18bpm, respectively. HR_6peak demonstrated excellent relative reliability (intraclass correlation coefficient=.93) and was associated with low variability (standard error of measurement=4.9bpm) in patients with CF.

Conclusions

HR_6peak is valid and demonstrates satisfactory test-retest reliability in patients with CF. These results might suggest the use of HR_6peak as a simple alternative method to individualize exercise prescriptions in this population. Further studies are needed in a larger cohort of patients to confirm these preliminary findings.