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Journal of Obesity
Volume 2012, Article ID 810594, 9 pages
http://dx.doi.org/10.1155/2012/810594
Clinical Study

Physical Activity Is Associated with Weight Loss and Increased Cardiorespiratory Fitness in Severely Obese Men and Women Undergoing Lifestyle Treatment

1Faculty of Health Studies, Sogn og Fjordane University College, P.O. Box 523, 6803 Førde, Norway
2Red Cross Haugland Rehabilitation Center, 6968 Flekke, Norway

Received 28 September 2011; Revised 4 January 2012; Accepted 13 March 2012

Academic Editor: António Palmeira

Copyright © 2012 Eivind Aadland and Lesley Robertson. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We aimed to examine the relationship between physical activity (PA) and change in body weight and cardiorespiratory fitness (CRF) in severely obese men and women. Thirty-five subjects (10 men, body mass index 4 3 . 2 ± 5 . 1  kg/m2) who participated in a 10-month lifestyle treatment programme were included. The PA duration correlated only with weight change for men ( 𝑟 = 0 . 6 9 , 𝑃 = . 0 2 7 versus 𝑟 = 0 . 1 9 , 𝑃 = . 3 7 2 for women). Conversely, the PA intensity correlated only with CRF for women ( 𝑟 = 0 . 6 1 , 𝑃 = . 0 0 3 versus 𝑟 = 0 . 3 9 , 𝑃 = . 3 4 0 for men). PA explained 55.8 and 5.6% of weight change for men and women, respectively, whereas the corresponding explained variances for CRF were 15.6 and 36.7%. We conclude that PA was associated with change in body weight and CRF; however, there was a trend towards a gender specific effect between severely obese men and women.