Table 2.
Summary of Study Measures
| Variable | Measures | Description | Properties | Testing Schedule |
|---|---|---|---|---|
| Exercise self-efficacy | Self-efficacy and exercise habits survey (Sallis, Pinski, Grossman, Patterson, & Nader, 1988) | 12 items Likert type-responses, range 12–60 | α=.85 (Sallis et al., 1988), test-retest reliability r=.78 (Sallis et al., 1999) | Pre-test,16 wks |
| Exercise benefits and barriers | Exercise benefits barriers scale (Sechrist et al., 1987) | 43 items Likert type-responses, range 43–172; barrier items are reverse scored | α=.95, test-retest reliability r=.88. (Sechrist et al., 1987) | Pre-test, 16 wks |
| Aerobic fitness | Queen’s College step test (McArdle, Katch, Peschar, Jacobson, Ruck, 1972) | 3 min step test used to predict VO2max based on recovery heart rate | Validity correlation r=−.75; test-retest reliability r=.92 (McArdle et al., 1972) | Pre-test, 16 wks |
| Muscle strength | Robertson curl-up (Robertson & Magnusdottir, 1987) | No. of modified curlups performed in 1 min | Test-retest reliability r=.94 (Robertson & Magnusdottir, 1987) | Pre-test, 16 wks |
| Flexibility | Modified sit and reach (Hoeger & Hopkins, 1992) | Measurement of low back & LE flexibility | Test-retest reliability r=.89 (Hoeger & Hopkins, 1992) | Pre-test, 16 wks |
| Percentage of body fat | Skin fold thickness (Pollock, Schmidt, & Jackson, 1980) | Seven site formula used to calculate % body fat | Validity correlation = .85 (Jackson, Pollock, & Ward, 1980) | Pre-test, 16 wks |
| Activity level | Digiwalker™ pedometer | Step counts (3 day) | Pedometer recorded 100%steps, SD between subject 0.36 km (Bassett et al., 1996) | Pre-test, 16 wks & 24 wks |