Accurate and reliable detection of the onset of gait initiation is essential for the correct assessment of gait. Thus, this study was aimed at evaluation of the reliability and accuracy of 3 different center of pressure–based gait onset detection algorithms: A displacement baseline–based algorithm (method 1), a velocity baseline–based algorithm (method 2), and a velocity extrema–based algorithm (method 3). The center of pressure signal was obtained during 10 gait initiation trials from 16 healthy participants and 3 participants with Parkinson’s disease. Intrasession and absolute reliability of each algorithm was assessed using the intraclass correlation coefficient and the coefficient of variation of center of pressure displacement during the postural phase of gait initiation. The accuracy was evaluated using the time error of the detected onset by each algorithm relative to that of visual inspection. The authors’ results revealed that although all 3 algorithms had high to very high intrasession reliabilities in both healthy subjects and subjects with Parkinson’s disease, methods 2 and 3 showed significantly better absolute reliability than method 1 in healthy controls (P = .001). Furthermore, method 2 outperformed the other 2 algorithms in both healthy subjects and subjects with Parkinson’s disease with an overall accuracy of 0.80. Based on these results, the authors recommend using method 2 for accurate and reliable gait onset detection.
Aisha Chen, Sandhya Selvaraj, Vennila Krishnan and Shadnaz Asgari
Kristin D. Morgan
Between-limb deficits in vertical ground reaction force (vGRF) production continue to remain years after anterior cruciate ligament rehabilitation, resulting in altered dynamic stability. However, the challenge is in identifying ways to assess this between-limb stability. This study implemented second-order autoregressive [AR(2)] modeling and its stationarity triangle to both quantitatively and visually delineate differences in dynamic stability from peak vGRF data in controls and post-anterior cruciate ligament reconstruction (ACLR) individuals during running. It was hypothesized that post-ACLR individuals would exhibit less dynamic stability than the controls, and that they would reside in a different location on the stationarity triangle, thus denoting differences in stability. The results presented supported the hypothesis that post-ACLR individuals exhibited significantly less dynamic stability than their control counterparts based on their model coefficients (AR1 P < .01; AR2 P = .02). These findings suggested that the post-ACLR individuals adopted a similar running pattern, possibly due to muscle weakness asymmetry, which was less dynamically stable and potentially places them at greater risk for injury. The ability of this approach to both quantitatively and visually delineate differences between these 2 groups indicates its potential as a return-to-sport decision tool.
Kylie McNeill, Natalie Durand-Bush and Pierre-Nicolas Lemyre
While coaches are considered at risk of experiencing burnout, there is an absence of intervention studies addressing this syndrome. The purpose of this qualitative study was to conduct a self-regulation intervention with five Canadian developmental (n = 2) and elite (n = 3) sport coaches (three men, two women) experiencing moderate to high levels of burnout and examine the perceived impact of this intervention on their self-regulation capacity and experiences of burnout and well-being. The content analysis of the coaches’ outtake interviews and five bi-weekly journals revealed that all five of them learned to self-regulate more effectively by developing various competencies (e.g., strategic planning for their well-being, self-monitoring) and strategies (e.g., task delegation, facilitative self-talk). Four of the coaches also perceived improvements in their symptoms of burnout and well-being. Sport psychology interventions individualized for coaches are a promising means for helping them manage burnout and enhance their overall functioning.
Yumeng Li, He Wang and Kathy J. Simpson
The purpose of the study was to compare the tibiofemoral contact forces of participants with chronic ankle instability versus controls during landings using a computer-simulated musculoskeletal model. A total of 21 female participants with chronic ankle instability and 21 pair-matched controls performed a drop landing task on a tilted force plate. A 7-camera motion capture system and 2 force plates were used to test participants’ lower-extremity biomechanics. A musculoskeletal model was used to calculate the tibiofemoral contact forces (femur on tibia). No significant between-group differences were observed for the peak tibiofemoral contact forces (P = .25–.48) during the landing phase based on paired t tests. The group differences ranged from 0.05 to 0.58 body weight (BW). Most participants demonstrated a posterior force (peak, ∼1.1 BW) for most duration of the landing phase and a medial force (peak, ∼0.9 BW) and large compressive force (peak, ∼10 BW) in the landing phase. The authors conclude that chronic ankle instability may not be related to the increased tibiofemoral contact forces or knee injury mechanisms during landings on the tilted surface.
Ashley A. Hansen, Joanne E. Perry, John W. Lace, Zachary C. Merz, Taylor L. Montgomery and Michael J. Ross
Evidence for the mechanisms of change by which sport psychology interventions enhance performance is limited and treatment monitoring and outcomes measures would assist in establishing evidence-based practices. The present paper fills a gap in sport psychology literature by demonstrating the development and validation of a new measure (Sport Psychology Outcomes and Research Tool; SPORT). Study 1 described test construction and pilot item selection with 73 collegiate student-athletes. Twenty-three pilot items contributed unique variance while maintaining the original constructs and were selected from 80 initial items. In Study 2, exploratory and confirmatory factor analyses were conducted with collegiate student-athletes (n = 220), revealing a 17-item, four-factor model measuring Athlete Wellbeing, Self-Regulation, Performance Satisfaction, and Sport-Related Distress. Concurrent validity was supported through correlational analyses. Overall, results supported the SPORT as a new transtheoretical tool for monitoring effectiveness and outcomes of sport psychology interventions.
Brian J. Foster and Graig M. Chow
Well-being research conducted in competitive athletics has been marred by the lack of a context-specific measurement instrument. The purpose of this study was to adapt the Mental Health Continuum – Short Form (MHC-SF) to create a sport-specific well-being instrument, the Sport Mental Health Continuum—Short Form (Sport MHC-SF), and test its initial psychometric properties. Participants were 287 collegiate athletes from a variety of sports. Confirmatory factor analysis (CFA) determined a three-factor structure of sport well-being, consisting of subjective, psychological, and social factors, as the model of best fit. Internal consistency reliabilities of the subscales exceeded .88. Moderate positive correlations were found between Sport MHC-SF subscales and quality of life indices, notably physical and emotional quality of life, demonstrating convergent validity. The Sport MHC-SF will facilitate empirical research by providing a more accurate and comprehensive measurement of well-being for an athletic population.
Jessica Ross and Peter D. MacIntyre
Flow is a desirable state of consciousness and absorption in an optimally challenging activity. Prior research has investigated individual differences in flow. The present study investigates flow by contrasting physical versus mental activities, using a mixed-methods, sequential explanatory design. The sample from the quantitative phase included 205 undergraduate university students assessed on measures of personality, difficulties in emotion regulation, and flow. The big-five traits intellect and conscientiousness, as well as the emotion regulation subscale “lack of emotional clarity” predicted flow during mental activities, but unexpectedly no variables significantly predicted physical flow activities. The second phase used semi-structured interviews with 10 participants. Analyses of the interviews helped further explain the statistical findings, revealing four main themes: role of stress, source of guilt, presence of others, and satisfaction and fulfillment. We conclude that flow is especially relevant in physical activities which have advantages over mental activities in opportunities to experience flow.
Luke Wilkins, Jen Sweeney, Zoella Zaborski, Carl Nelson, Simon Tweddle, Eldre Beukes and Peter Allen
The purpose of the present study was to address perceptions towards Cognitive Behavioral Therapy (CBT) in soccer. Twenty-four male, elite academy soccer players (M age = 20.04) completed a custom-made questionnaire which included education on CBT. The results found that: i) initially, only 8% of players had heard of CBT whilst only 4% of players knew what CBT was, ii) players strongly agreed that CBT should be offered to all players, iii) not knowing how/where to seek help was identified as the main barrier to CBT, iv) players indicated a preference for one-to-one and face-to-face CBT, as opposed to small-group or online-CBT, and v) players perceived they would receive most support from family/friends, and least support from teammates, if they were to undertake CBT. These findings demonstrate that whilst initial awareness and knowledge of CBT is low, general perceptions towards CBT are positive once athletes are educated on the area.
Bradley Donohue, Marina Galante, Julia Maietta, Bern Lee, Nina Paul, Joanne E. Perry, Arianna Corey and Daniel N. Allen
The conspicuous absence of validated screening measures specific to mental health symptomology in collegiate athletes has negatively affected clinical practice in this population. Therefore, this study was performed to develop a sport specific measure to optimally identify collegiate athletes who are particularly likely to benefit from mental health programming. Participants were 289 collegiate-athletes who were assessed for mental health symptomology using the Global Severity Index of Symptom Checklist-90-Revised (GSI), factors that interfere with sport performance using the Problems in Sport Competition Scale (PSCS) and Problems in Sport Training Scale (PSTS), and motivation to pursue professional counseling using the Desire to Pursue Sport Psychology Scale (DSPS). As hypothesized, a hierarchical multiple regression analysis indicated that PSCS, PSTS and DSPS scores significantly predicted GSI scores, controlling gender and sport status (NCAA, club, intramural). Receiver operating characteristic (ROC) analysis indicated that high-risk athletes (GSI T-scores ≥ 60) could be correctly classified by PSTS and PSCS scores. Results suggest the PSCS and PSTS may assist identification of collegiate athletes who are especially appropriate for mental health programs. These scales additionally identify factors directly relevant to athletes’ sport performance.
Nicole T. Gabana, Aaron D’Addario, Matteo Luzzeri, Stinne Soendergaard and Y. Joel Wong
Salient aspects of an athlete’s identity hold implications for how sport psychology practitioners conceptualize and intervene on both the mental health and performance realms of the athlete person. Given that spirituality, religiosity, and gratitude have been associated in previous literature, the current study examined whether athletes differed in dispositional gratitude based on their spiritual and religious identification. Results indicated that among 331 NCAA Division I-III athletes, those who identified as both spiritual and religious scored significantly higher in dispositional gratitude than self-identified spiritual/non-religious and non-spiritual/non-religious athletes. Non-spiritual/non-religious and spiritual/non-religious athletes did not significantly differ in levels of gratitude. Findings and limitations of the current study warrant further investigation on this topic, and recommendations for future research and practice are provided.