• The Effect of Trainer Muscularity and Expertise on Self-Presentational Concerns, Body Image, and Performance in College Men during One-Repetition Maximum Testing

      Crozier, Scott; Applied Health Sciences Program (Brock University, 2012-09-18)
      This study attempted to manipulate self-presentational efficacy to examine the effect on social anxiety, social physique anxiety, drive for muscularity, and maximal strength performance during a one-repetition maximum (1-RM) chest press and leg press test. Ninety-nine college men with a minimum of six months of previous weight training experience were randomly assigned to complete a 1-RM protocol with either a muscular male trainer described as an expert or a lean male trainer described as a novice. Participants completed measures of self-presentation and body image prior to meeting their respective trainer, and following the completion of the 1-RM tests. Although the self-presentational efficacy manipulation was not successful, the trainers were perceived significantly differently on musculature and expertise. The group with the muscular, expert trainer reported higher social anxiety and attained higher 1-RM scores for the chest and leg press. Thus, trainer characteristics can affect strength performance and self-presentational concerns in this population.
    • The Effects of Self-Selected vs Researcher-Selected Music on Psychological, Physiological and Performance Outcomes During a Running Task

      Pierre, Jermel; Gammage, Kimberley; Applied Health Sciences Program
      The present study examined the effects of self-selected versus researcher-selected music on psychological, physiological and performance variables during a treadmill running task. Male and female participants (n = 30) performed a 30-minute treadmill run to their own self-selected music, researcher-selected motivational music and a no-music condition. Participants were assessed on intrinsic motivation, enjoyment, RPE, distance and heart rate. A series of repeated measures ANOVAs were used to analyse the data. Results indicated that following listening to their self-selected music, participants reported being more intrinsically motivated, more enjoyment, greater rating of perceived exertion and greater distance run. This study suggest that self-selected music may be an avenue to helping individuals overcome barriers to physical activity such as intrinsic motivation and enjoyment to help promote greater physical activity participation and adherence.
    • Investigating the Effects of a Task-Specific Fatigue Protocol on Hand Tracking Performance Using a Wrist Robotic Device

      Fortaleza, Alvin; Applied Health Sciences Program
      The purpose of this work was to evaluate the effects of a dynamic submaximal fatigue protocol and forearm/hand anthropometrics on hand tracking performance. Participants traced a 2:3 Lissajous curve using a haptic wrist robotic device (WristBot). This same curve was traced before the fatigue (baseline), during the fatigue protocol, and after the fatigue protocol. Post fatigue trials were completed at 0, 1, 2, 4, 6, 8, and 10 minutes after the cessation of the fatigue protocol. Overall tracking performance and movement smoothness decreased immediately. Directional biases in the normal and longitudinal component of tracking error were present after the fatigue protocol. Proximal forearm circumference and forearm length had a negative correlation with movement smoothness. Hand tracking performance decreased due to the submaximal fatigue protocol. Those with a larger proximal forearm circumference and longer forearm length had better movement smoothness performance which can be applied to the workplace where hand and wrist are predominately used.