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Anass Arrogi, Astrid Schotte, An Bogaerts, Filip Boen and Jan Seghers

Background: This study evaluated the effects of a 3-month workplace physical activity (PA) intervention on employees’ health-related fitness and well-being. Moreover, mediational pathways were examined. Methods: A longitudinal, quasi-experimental trial was evaluated in Belgian employees. The intervention group (IG: n = 246) received 3-months individualized, tailored PA counseling, consisting of face-to-face counseling and follow-up e-mail and telephone contacts. The reference group (n = 54) received no PA counseling. Outcome measures (assessed at baseline, 3 mo [short term], and 9 mo [long term]) included body composition, cardiorespiratory fitness, well-being, and step-based PA. Results: With no changes in the reference group, the IG showed short-term improvements in body mass index (−0.24 kg/m2, P < .001), body fat (−0.88%, P < .001), waist circumference (−1.47 cm, P < .001), and muscle percentage (+0.47%, P < .001). Moreover, with respect to cardiorespiratory fitness, IG participants improved on perceived exertion, both in the short term (−0.91, P < .001) and long term (−0.83, P < .001). Furthermore, perceived physical well-being increased in the IG, both in the short term (+0.57, P < .001) and long term (+0.57, P < .001). The observed intervention effects on body composition, perceived exertion, and well-being were mediated by (increases in) step-based PA. Conclusions: Workplace PA counseling programs have the potential to enhance employees’ health-related fitness and well-being. Importantly, step-based PA behavior change was found to contribute to the postintervention improvements.

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Jan Seghers, Ann-Sophie Van Hoecke, Astrid Schotte, Joke Opdenacker and Filip Boen

Background:

Self-efficacy has been found to be an important precondition for behavioral change in sedentary people. The current study examined the effectiveness and added value of including a 15-minute selfefficacy coaching at the start of a 12-week lifestyle physical activity (PA) program.

Methods:

Participants were randomly assigned to a standard-intervention group (without additional self-efficacy coaching, N = 116) or extra-intervention group (with additional self-efficacy coaching, N = 111). Body mass index (BMI), cardiovascular fitness, self-reported PA, and self-efficacy beliefs were assessed at baseline and immediately after the intervention period. Perceived adherence to the PA program was assessed postintervention.

Results:

At posttest, a significant increase in cardiovascular fitness and decrease in BMI were found in both groups. Significant intervention effects emerged on PA behavior, self-efficacy, and program adherence, in favor of the extra-intervention group. Self-efficacy mediated the intervention effect on program adherence whereas no evidence was found for its role as mediator of PA change.

Conclusions:

Adding a 15-minute self-efficacy coaching at the start of a lifestyle PA program is a promising strategy to enhance the intervention effects on PA behavior, self-efficacy beliefs, and program adherence. However, the role of self-efficacy as mediator of the intervention effect on in PA was not fully supported.