PWC_75%/kg, a Fitness Index Not Linked to Resting Heart Rate: Testing Procedure and Reference Values

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• 作者：Charles Sebiyo Batcho ; PT^a ; Jean-Louis Thonnard ; PhD^a ; ^b ; Henri Nielens ; MD ; PhD^a ; ^b ; ^{henri.nielens@uclouvain.be" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Assessment process ; Physical fitness ; Reference values ; Rehabilitation
• 刊名：Archives of Physical Medicine and Rehabilitation
• 出版年：2012
• 出版时间：July 2012
• 年：2012
• 卷：93
• 期：7
• 页码：1196-1200
• 全文大小：421 K

文摘

Batcho CS, Thonnard J-L, Nielens H. PWC_75%/kg, a fitness index not linked to resting heart rate: testing procedure and reference values.

Objectives

To develop a fitness index unlinked to resting heart rate and suitable for clinical use, and to obtain reference values of this new index for healthy subjects.

Design

Cross-sectional study.

Setting

Research laboratory.

Participants

A volunteer sample of healthy subjects (N=100; 50 men; age range, 20–70y) randomly recruited from the general community.

Interventions

Not applicable.

Main Outcome Measures

Participants performed a submaximal, multistage cycle ergometer test. A new fitness index, the physical working capacity at 75% of the predicted maximal heart rate per kilogram of body weight (PWC_75%/kg), was calculated. Its concordance with a previously described fitness index and its relationship with age were examined, as well as differences attributable to sex and lifestyle. Reference values of the PWC_75%/kg (mean ± SD and 95% confidence interval) were calculated and categorized by age classes of 10 years and by sex.

Results

The intraclass correlation coefficient (ICC) between PWC_75%/kg and the working capacity index at 65% of the heart rate reserve per kilogram of body weight (WCI_65%HRreserve/kg) was very high (ICC=.96, P<.001), indicating that the fitness index can be estimated without measuring the resting heart rate. PWC_75%/kg decreased as age increased. The average PWC_75%/kg was significantly higher in men than in women (P<.001), and in active than in inactive subjects (P<.01).

Conclusions

This study presents a new fitness index, the PWC_75%/kg, which is suitable for measuring fitness in active and sedentary people aged 20 to 70 years. It may also be a suitable fitness index for selected chronically ill individuals. This study also provides reference values of the PWC_75%/kg obtained from healthy men and women.