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- PublicationLower Limb Interjoint Postural Coordination One Year after First-Time Lateral Ankle Sprain(Wolters Kluwer, 2015-11-01)Introduction: Longitudinal analyses of participants with a history of lateral ankle sprain are lacking. This investigation combined measures of lower limb interjoint coordination and stabilometry to evaluate static unipedal stance with the eyes open (condition 1) and closed (condition 2) in a group of participants with chronic ankle instability (CAI) compared to lateral ankle sprain ‘‘copers’’ (both recruited 12 months after sustaining an acute first-time lateral ankle sprain) and a group of noninjured controls. Methods: Twenty-eight participants with CAI, 42 lateral ankle sprain ‘‘copers,’’ and 20 noninjured controls completed three 20-s singlelimb stance trials in conditions 1 and 2. An adjusted coefficient of multiple determination statistic was used to compare stance limb threedimensional kinematic data for similarity to establish patterns of interjoint coordination. The fractal dimension of the stance limb center of pressure path was also calculated. Results: Between-group analyses revealed that participants with CAI displayed notable increases in ankle–hip linked coordination compared with both lateral ankle sprain ‘‘copers’’ (j0.52 (1.05) vs 0.28 (0.9), P = 0.007) and controls (j0.52 (1.05) vs 0.63 (0.64), P = 0.006) in condition 1 and compared with controls only (0.62 (1.92) vs 0.1 (1.0) P = 0.002) in condition 2. Participants with CAI also exhibited a decrease in the fractal dimension of the center-of-pressure path during condition 2 compared with both controls and lateral ankle sprain ‘‘copers.’’ Conclusions: Participants with CAI present with a hip-dominant strategy of eyes-open and eyes-closed static unipedal stance. This coincided with reduced complexity of the stance limb center of pressure path in the eyes-closed condition.
370Scopus© Citations 15
- PublicationEffect of oral glucose supplementation on surface EMG during fatiguing dynamic exercise(IEEE, 2016-08-20)The aim of this study was to examine the effect of oral glucose supplementation on the surface electromyographic (sEMG) signal recorded during a dynamic, fatiguing exercise protocol. Five healthy subjects participated in the study. Blood glucose concentration and sEMG signals from five upper leg muscles were recorded during a cycling exercise performed at 70% VO2peak until task failure, on two separate occasions. Glucose was consumed at 15 minute intervals throughout one trial. The median frequency of the sEMG was observed to increase progressively throughout the exercise, with a greater increase in the with glucose condition. This is in direct contrast to the typical decrease in median frequency known to occur during a fatiguing isometric contraction. The result may indicate an increase in Na+ - K+- AT Pase activity during fatiguing dynamic exercise resulting in an increase in muscle fiber membrane excitability due to membrane hyperpolarization.
282Scopus© Citations 2
- PublicationPerformance Management: A Systematic Review of Processes in Elite Sport and Other Performance Domains(Taylor & Francis, 2018-03-22)Performance management is integral for high-performing organizations and teams. The purpose of this review was to synthesize evidence on performance management across elite sport and other performance-focused domains (business, performing arts, high-risk professions). A systematic search and screening strategy was undertaken. Twenty studies satisfied the inclusion criteria. Thematic synthesis enabled the identification of key components of performance management. Similarities and differences between elite sport and other domains are identified across the following themes: strategic performance management, operational performance management, individual performance management, and leadership of the performance team. Implications for practitioners in elite sport are also considered across these themes.
1259Scopus© Citations 13
- PublicationThe Prevalence of Depressive and Anxiety Symptoms in Student-Athletes and the Relationship with Resilience and Help-Seeking Behavior(Human Kinetics, 2018-05-03)The purpose of this study was to investigate the prevalence of depressive and anxiety symptoms within student-athletes and to examine protective factors which may act as a buffer against mental ill-health. A cross-sectional design was employed. A sample of 185 student-athletes (M=20.77; SD= .50; 35% female) agreed to take part. Participants completed measures of depression, anxiety, psychological resilience and formal and informal help-seeking behavior. Thirty one percent of student-athletes reported moderate to severe symptoms of depression and/or anxiety. Student-athletes who reported requiring professional help for problems were more likely to record moderate to severe symptoms of depression and anxiety. Student-athletes who did not seek informal support were more likely to report symptom levels for depression outside the normal range. Higher resilience scores were associated with lower symptom reporting for both depression and anxiety. Practical implications for supporting student-athletes’ mental health across institutional, interpersonal and intrapersonal levels are discussed.
2145Scopus© Citations 25
- PublicationThe ability of athletes with long-standing groin pain to maintain a stable lumbopelvic position: A laboratory study(Elsevier, 2017-01)Objectives: The ability to maintain a lumbopelvic position (LPP) was assessed in athletes with a history of long-standing groin pain (LSGP) and athletes without LSGP. Design: Case-control study. Setting: University motion analysis laboratory. Participants: Thirty male athletes–15 with a history of LSGP (>12 weeks) and 15 without. Main outcome measures: Maintenance of LPP was assessed using a pressure biofeedback unit (PBU) during supine single leg lift (SLL), single leg extension (SLE) and bent knee fallout (BKFO). Repeatability was assessed using intra-class correlation coefficients (ICC) and group differences analysed using MANOVA. Results: Differences were detected between involved and uninvolved sides in the LSGP group during SLL (mean difference [md] = 9.82 mmHg, p < 0.01) and BKFO (md = 8.56 mmHg, p < 0.01) but not during SLE (md = 0.38 mmHg, p = 0.96). Between group differences were found during the SLL of the involved leg (md = 5.22 mmHg p = 0.034) and the BKFO of the uninvolved leg (md = 6.22 mmHg p = 0.017). Inter-session reliability varied for the different movement tasks in both groups (ICC = 0.35–0.94). Conclusions: Ability to maintain LPP differed between the involved and uninvolved legs within the LSGP group and between the athletes with and without LSGP. Despite resolution of groin pain, altered control of lumbopelvic position existed with possible implications for later injury recurrence.
321Scopus© Citations 5