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The Journal of Sports Medicine and Physical Fitness 2020 May;60(5):786-93

DOI: 10.23736/S0022-4707.20.10387-6


language: English

A moderate 200-m walk test estimates peak oxygen uptake in elderly outpatients with cardiovascular disease

Gianni MAZZONI 1, 2, 3, Jonathan MYERS 4, 5, Biagio SASSONE 6, Giovanni PASANISI 6, Simona MANDINI 1, 2 , Andrea RAISI 1, Matteo PIZZOLATO 1, Michele FRANCHI 1, Lorenzo CARUSO 2, Loretta MISSIROLI 7, Giorgio CHIARANDA 3, 8, Giovanni GRAZZI 1, 2, 3

1 Center for Exercise Science and Sport, University of Ferrara, Ferrara, Italy; 2 Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy; 3 Department of Public Health, AUSL Ferrara, Ferrara, Italy; 4 Division of Cardiology, VA Palo Alto Health Case System, Palo Alto, CA, USA; 5 Stanford University School of Medicine, Stanford, CA, USA; 6 Division of Cardiology, Department of Medicine, AUSL Ferrara, Ferrara, Italy; 7 Unit of Bibliometric and Dataset, Research Office, University of Ferrara, Ferrara, Italy; 8 Department of Public Health and Integration Policy, Emilia-Romagna Region, Bologna, Italy

BACKGROUND: A moderate 1-km treadmill walk test (1k-TWT) has been demonstrated to be a valid tool for estimating peak oxygen uptake (VO2peak) in outpatients with cardiovascular disease (CVD). The results obtained by the 1k-TWT predict survival and hospitalization in men and women with CVD. We aimed to examine whether shorter versions of the full 1k-TWT equally assess VO2peak in outpatients with CVD.
METHODS: One hundred eighteen outpatients with CVD, aged 70±9 years, referred to an exercise-based secondary prevention program, performed a moderate and perceptually-regulated (11-13/20 on the Borg Scale) 1k-TWT. Age, height, weight, heart rate, time to walk 100-m, 200-m, 300-m, and 400-m, and the full 1000-m, were entered into equations to estimate VO2peak.
RESULTS: The minimal distance providing similar VO2peak results of the full 1k-TWT was 200-m: 23.0±5.3 mL/kg/min and 23.0±5.5 mL/kg/min, respectively. The concordance correlation coefficient between the two was 0.97 (95%CI 0.96 to 0.98, P<0.0001). The slope and the intercept of the relationship between the values obtained by the 200-m and the full 1k-TWT were not different from the line of identity. Bland-Altman analysis did not show systematic or proportional error.
CONCLUSIONS: A moderate 200-m treadmill-walk is a reliable method for estimating VO2peak in elderly outpatients with CVD. A 200-m walk enables quick and easy cardiorespiratory fitness assessment, with low costs and low burden for health professionals and patients. These findings have practical implications for the transition of patients from clinically-based programs to fitness facilities or self-guided exercise programs.

KEY WORDS: Exercise test; Walking; Cardiorespiratory fitness; Cardiovascular diseases

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