Were offered on a voluntary basis every 3 months ie

This preview shows page 2 - 3 out of 9 pages.

were offered on a voluntary basis every 3 months (ie four times per year). The test battery included measurements of body weight, percentage fat, 1-min bent-knee sit-ups, 1-min push-ups, sit and reach test of lower back = hamstring flex- ibility, self-report physical activity measured by the NASA Activity Scale (NAS), and VO 2max estimated from perfor- mance on a 1.5-mile run or a 1-mile walk. Procedures for administering these field tests have been published else- where. 20 The standard for data inclusion was that the sub- jects had to return for testing for a period of 2 y or longer and during that period complete a minimum of 50% of the quarterly fitness tests. The years of employee participation ranged from 2 to 15 y (mean 5.5 ± 3.4 y); the time period between the first and final weight measurements was also in this range. The NAS ratings were obtained each time the subject completed a fitness test battery in the period between the first and final weight measurements. The number of NAS ratings recorded per individual ranged from 5 to 60 (mean 14.2 ± 10.4). The T2 data were obtained at each employee’s final retest session. Measures All employees were medically screened for entrance into the health-related fitness program. The screening included a maximal treadmill stress test for men age 40 or over and women over age 50 y. Stress testing was done on younger employees if: (1) they exhibited symptoms or were diag- nosed with cardiovascular disease; and (2) the medical examination documented two or more cardiovascular dis- ease risk factors. A total of 287 employees (60%) had a stress test. For those who had a stress test, VO 2max was measured by indirect calorimetry. These methods are fully outlined in other sources. 21 – 23 A non-exercise method 21 was used to estimate VO 2max at baseline for those who did not have an exercise stress test. Percentage body fat was measured by the skin fold method. 24,25 The VO 2max and body composition data were used for descriptive purposes. Level of physical activity was obtained by self-report with the NAS shown in the Appendix. The scale enables subjects to rate their general activity behavior over the previous 30 days. The scale range is from 0 to 10, which is based on the total weekly minutes spent in exercise or the total weekly miles run or walked. A NAS of 0 – 1 represents very low activity. A rating of 2 – 3 represents regular recreation or work of modest effort in such activities as golf or yard work for a weekly total of between 30 min to 2 h. Ratings of 4 – 10 represent regular participation in aerobic exercise ranging from light to heavy exercise. At each quarterly retest the employees used the NAS to rate their level of physical activity. The mean of all ratings between T1 and T2 was used to define the employee’s level of physical activity. These data were used in two ways. First, the mean ratings were used to place the employee into a physical activity group. The groups defined by the mean NAS rating were: Inactive, ² 3.5; Moderately Active, > 3.5 – 4.99; Active 5.0 – 6.5; and Very Active
Image of page 2

Subscribe to view the full document.

Image of page 3
You've reached the end of this preview.
  • Spring '12
  • fwsf
  • The Land, physical activity, International Journal of Obesity, LT Wier

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern