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Although the health hazards of truck drivers are well known, only few studies address the health status of this occupational group. The purpose of this empirical research paper is to evaluate the effects of motivational and volitional coaching on workplace physical activity (WPA) with the provision of a vehicle-integrated fitness device.

Intervention group 1 and intervention group 2 received motivational coaching to improve behavioral internalization. Intervention group 2 received additional volitional coaching to increase physical activity (PA)-related self-efficacy. The control group received only the vehicle-integrated fitness device to perform WPA, as did both intervention groups. Internalization and PA-related self-efficacy were collected four times. WPA was assessed weekly.

All 140 participating truck drivers were consistently physically active for an average of 85 min (SD = 85.2 min) during motivational coaching, 76 min (SD = 65.0 min) during volitional coaching and 71.0 min (SD = 63.5 min) during follow-up, with no differences found between groups. Variance analyses for repeated measures revealed no intervention effects on WPA, internalization and self-efficacy, and internalization and self-efficacy did not prove to be mediators of increased WPA.

The primary goal of increasing WPA of all participants was achieved, but the present form of coaching cannot be confirmed as a successful strategy. Nevertheless, the results are valuable and could be an impetus for further research on WPA promotion in truck drivers as the creation of an opportunity with the vehicle-integrated fitness device alone led to an increased WPA.