Robert H. Hughes
Robert H. Hughes
Robert Kerr and Kathy Hughes
Results of recent research have implicated information processing deficits in explaining the poor academic performance of learning disabled children. However, the motor difficulties of these children have not been extensively studied from a processing framework, yet cognitive skills are inherent to the successful performance of motor skills. Sixteen learning disabled and sixteen control subjects ranging in age from 6 to 8 years were tested on a Fitts’ reciprocal tapping task using 16 different target combinations with the ID ranging from 1.50 to 6.64 bits. Analysis of the slope and intercept coefficients showed a significant difference for intercept but not for slope. These data suggest that the problem may not be a major processing deficit, as the learning disabled children were able to handle the increased task difficulty in the same manner as the controls. Instead the problem may exist at the very early input stage of the processing mechanism: getting the information into the system.
Robert Hughes and Jay Coakley
The purpose of this paper is to develop a working definition of positive deviance and use the definition in an analysis of behavior among athletes. It is argued that much deviance among athletes involves excessive overconformity to the norms and values embodied in sport itself. When athletes use the “sport ethic”—which emphasizes sacrifice for The Game, seeking distinction, taking risks, and challenging limits—as an exclusive guide for their behavior, sport and sport participation become especially vulnerable to corruption. Although the sport ethic emphasizes positive norms, the ethic itself becomes the vehicle for transforming behaviors that conform to these positive norms into deviant behaviors that are prohibited and negatively sanctioned within society and within sport organizations themselves. Living in conformity to the sport ethic is likely to set one apart as a “real athlete,” but it creates a clear-cut vulnerability to several kinds of deviant behavior. This presents unique problems of social control within sport. The use of performance enhancing drugs in sport is identified as a case in point, and an approach to controlling this form of positive deviance is discussed.
Robert Hughes and Jay Coakley
Robert W. Meyers, Jon L. Oliver, Michael G. Hughes, Rhodri S. Lloyd, and John Cronin
The purpose of this study was to examine the reliability of the spatiotemporal determinants of maximal sprinting speed in boys over single and multiple steps. Fifty-four adolescent boys (age = 14.1 ± 0.7 years [range = 12.9–15.7 years]; height = 1.63 ± 0.09 m; body mass = 55.3 ± 13.3 kg; -0.31 ± 0.90 age from Peak Height Velocity (PHV) in years; mean ± s) volunteered to complete a 30 m sprint test on 3 occasions over a 2-week period. Speed, step length, step frequency, contact time, and flight time were assessed via an optical measurement system. Speed and step characteristics were obtained from the single-fastest step and average of the 2 and 4 fastest consecutive steps. Pairwise comparison of consecutive trials revealed the coefficient of variation (CV) for speed was greater in 4-step (CV = 7.3 & 7.5%) compared with 2-step (CV = 4.2 & 4.1%) and 1-step (CV = 4.8 & 4.6%) analysis. The CV of step length, step frequency and contact time ranged from 4.8 to 7.5% for 1-step, 3.8–5.0% for 2-step and 4.2–7.5% for 4-step analyses across all trials. An acceptable degree of reliability was achieved for the spatiotemporal and performance variables assessed in this study. Two-step analysis demonstrated the highest degree of reliability for the key spatiotemporal variables, and therefore may be the most suitable approach to monitor the spatiotemporal characteristics of maximal sprint speed in boys.
Robert W. Meyers, Jonathan L. Oliver, Michael G. Hughes, John B. Cronin, and Rhodri S. Lloyd
The purpose of this study was to examine the natural development of the mechanical features of sprint performance in relation to maturation within a large cohort of boys. Three hundred and thirty-six boys (11-15 years) were analyzed for sprint performance and maturation. Maximal speed, stride length (SL), stride frequency (SF), flight time (FT) and contact time (CT) were assessed during a 30m sprint. Five maturation groups (G1-5) were established based on age from peak height velocity (PHV) where G1=>2.5years pre-PHV, G2 = 2.49-1.5years pre-PHV, G3 = 1.49-0.5years pre-PHV, G4 = 0.49years pre- to 0.5years post-PHV and G5 = 0.51-1.5years post-PHV. There was no difference in maximal speed between G1, G2 and G3 but those in G4 and G5 were significantly faster (p < .05) than G1-3. Significant increases (p < .05) in SL were observed between groups with advancing maturation, except G4 and G5 (p > .05). SF decreased while CT increased (both p < .05) between G1, G2 and G3, but no further significant changes (p > .05) were observed for either variable between G3, G4 and G5. While G1-3 increased their SL, concomitant decreases in SF and increases in CT prevented them from improving maximal speed. Maximal sprint speed appears to develop around and post-PHV as SF and CT begin to stabilize, with increases in maximal sprint speed in maturing boys being underpinned by increasing SL.
Robert W. Meyers, Jon L. Oliver, Michael G. Hughes, Rhodri S. Lloyd, and John B. Cronin
The aim of this study was to examine the influence of age and maturation upon magnitude of asymmetry in the force, stiffness and the spatiotemporal determinants of maximal sprint speed in a large cohort of boys.
344 boys between the ages of 11 and 16 years completed an anthropometric assessment and a 35 m sprint test, during which sprint performance was recorded via a ground-level optical measurement system. Maximal sprint velocity, as well as asymmetry in spatiotemporal variables, modeled force and stiffness data were established for each participant. For analysis, participants were grouped into chronological age, maturation and percentile groups.
The range of mean asymmetry across age groups and variables was 2.3–12.6%. The magnitude of asymmetry in all the sprint variables was not significantly different across age and maturation groups (p > .05), except relative leg stiffness (p < .05). No strong relationships between asymmetry in sprint variables and maximal sprint velocity were evident (rs < .39).
These results provide a novel benchmark for the expected magnitude of asymmetry in a large cohort of uninjured boys during maximal sprint performance. Asymmetry in sprint performance is largely unaffected by age or maturation and no strong relationships exist between the magnitude of asymmetry and maximal sprint velocity.
Andrea Bailey, Nicola Goodstone, Sharon Roberts, Jane Hughes, Simon Roberts, Louw van Niekerk, James Richardson, and Dai Rees
To develop a postoperative rehabilitation protocol for patients receiving autologous-chondrocyte implantation (ACI) to repair articular-cartilage defects of the knee.
careful review of both basic science and clinical literature, personal communication with colleagues dealing with similar cases, and the authors’ experience and expertise in rehabilitating numerous patients with knee pathologies, injuries, and trauma.
Postoperative rehabilitation of the ACI patient plays a critical role in the outcome of the procedure. The goals are to improve function and reduce discomfort by focusing on 3 key elements: weight bearing, range of motion, and strengthening.
The authors present 2 flexible postoperative protocols to rehabilitate patients after an ACI procedure to the knee.
David X. Marquez, Robert Wilson, Susan Aguiñaga, Priscilla Vásquez, Louis Fogg, Zhi Yang, JoEllen Wilbur, Susan Hughes, and Charles Spanbauer
Disparities exist between Latinos and non-Latino Whites in cognitive function. Dance is culturally appropriate and challenges individuals physically and cognitively, yet the impact of regular dancing on cognitive function in older Latinos has not been examined. A two-group pilot trial was employed among inactive, older Latinos. Participants (N = 57) participated in the BAILAMOS© dance program or a health education program. Cognitive test scores were converted to z-scores and measures of global cognition and specific domains (executive function, episodic memory, working memory) were derived. Results revealed a group × time interaction for episodic memory (p < .05), such that the dance group showed greater improvement in episodic memory than the health education group. A main effect for time for global cognition (p < .05) was also demonstrated, with participants in both groups improving. Structured Latin dance programs can positively influence episodic memory, and participation in structured programs may improve overall cognition among older Latinos.