The below list represents only planned manuscripts. Some of these
manuscripts have not been received by the Editorial Office yet. Papers
submitted to MDPI journals are subject to peer-review.
Type of Paper: Article
Title: Performance-Based Correlates to Vertical Jump Height and Power Values
Authors: J. F. Caruso, A. G. Barbosa, E. V. Gutierrez, M. W. Keller, S. D. Vickers, J. L. Martin, J. D. McArtor, R. A. Baptista, A. N. Clark, J. O. West, R. H. Walker and J. S. Daily
Abstract: We examined what types of performance-based variables (kinetic, temporal, force-time integrative, expressed relative to body mass) are the best correlates to vertical jump height and power values. Men (n = 117) performed vertical jumps on an instrumented platform placed aside a Vertec; both devices obtained data as jumps were performed. Vertec values were used to identify jump height and power, each of which served as criterion measures. The platform provided six performance-based variables from the takeoff phase of jumps; they were used to predict the variance per criterion measure via multivariate regression. With either jump height or power as a criterion each multivariate analysis, with corrections for multiple testing, revealed a significant (p < 0.05) amount of variance correlated to our performance-based independent variables. Univariate correlations showed peak force and area under the curve were the best predictors of jump height, as well as power, variance. Our results concur with outcomes from trials that employed similar subjects. We conclude kinetic and force-time integrative variables are the best correlates to vertical jump prowess when performance-based measures are derived from an instrumented platform.
Title: Epidemiological Review of Injuries in Rugby Union
Authors: JF Kaux 1,2,3, M Julia 4, M Chupin 3, F Delvaux 3, JL Croisier 2,3, B Forthomme 2,3, JM Crielaard 2,3, C Le Goff 2, P Durez 5, P Ernst 1, S Guns 1 and A Laly 1
Affiliations: 1 Centre de Formation de la Ligue Belge Francophone de Rugby (LBFR), ADEPS du Blanc Gravier, Allée des Sports, P63, Liège, Belgium
2 Multidisciplinary Medical and Sports Traumatology Service (SPORTS2), Liège CHU, Avenue de l’Hôpital, B35, Liège, Belgium
3 Department of Motricity Sciences, University of Liège, Allée des Sports, P63, Liège, Belgium
4 Commission Médicale de la Fédération Française de Rugby (FFR), Fédération MPR Montpellier-Nîmes, Hôpital Lapeyronie CHRU Montpellier, France
5 Medical Committee of the Fédération Belge de Rugby (FBR)
Abstract: Rugby is a sport which is growing in popularity. A contact sport par excellence, it causes a significant number of injuries. In rugby union, there are 30 to 91 injuries per 1,000 match hours. This epidemiological review of injuries incurred by rugby players mentions the position and type of injuries, the causes, time during the match and season in which they occur, the players' positions and the type of surface as well as the length of players' absences following the injury.
Keywords: injuries; rugby union; epidemiology; surface
Type of Paper: Article
Title: The Effect of High Intensity Intermittent Exercise on Power Output for the Upper Body
Authors: Leonie Harvey 1,*, Matthew Bousson 1, Chris McLellan 2 and Dale I Lovell 1
Affiliations:1 School of Health and Sport Sciences, Faculty of Science, Health & Education, University of the Sunshine Coast, Sippy Downs, Queensland, 4556, Australia; E-Mail: firstname.lastname@example.org (L.H.)
2 Faculty of Health Sciences and Medicine, Bond University, Robina, Queensland, 4226, Australia
Abstract: The aim of the present study was to examine and measure high intensity, intermittent upper body performance during the 5 × 6s repeat sprint test. Fifteen physically active males completed an upper body 5 × 6s test on a modified electro-magnetically braked cycle ergometer, which consisted of 5 maximal effort sprints, each 6 seconds in duration, separated by 24 seconds of passive recovery. A fly wheel braking force corresponding to 5% of the participants’ body weight was used as the implemented resistance level. Body composition was measured using dual-energy X-ray absorptiometry (DEXA). Percent (%) decrement was also calculated using previous research methods. Significant (P < 0.05) differences were found between sprints for both absolute and relative (W, W•kg-1, W•kg-1 LBM and W•kg-1 UBLBM) peak (PP) and mean (MP) power. The percentage (%) decrement in total work done over the 5 sprints was 11.4%. Stepwise multiple linear regression analysis revealed that upper body lean body mass (UBLBM) accounts for 87% of the variance in total work done during the upper body 5 × 6s sprint test. These results provide a descriptive analysis of upper body, high intensity intermittent exercise, demonstrating that PP and MP output decreased significantly during the upper body 5 × 6s sprint test.
Type of Paper: Article
Title: A New View of Responses to First-Time Barefoot Running
Authors: Michael Wilkinson 1, Nick Caplan 1, Richard Akenhead 2.and Phillip R Hayes 1
Affiliation: 1 Faculty of Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, England; E-Mail: email@example.com (M.W.)
2 Sports Medicine Institute, ASPETAR, Doha, Qatar
Abstract: We examined acute alterations in gait and oxygen cost from shod-to-barefoot running in habitually-shod well-trained runners with no prior experience of running barefoot to test predictions of the plantar-sensory-feedback-loop hypothesis. Thirteen runners completed six-minute treadmill runs shod and barefoot on separate days at a mean speed of 12.5 km·h-1. Steady-state oxygen cost in the final minute was recorded. Kinematic data were captured from 30-consecutive strides. Mean differences between conditions were estimated with confidence intervals. When barefoot, stride length and ground-contact time decreased while stride rate increased. Leg and vertical stiffness and ankle-mid-stance dorsi-flexion angle increased when barefoot while horizontal distance between point of contact and the hip decreased. Mean oxygen cost decreased in barefoot compared to shod running (-11% to -3%; 90% likely beneficial) and was related to the change in ankle angle and point-of-contact distance, though individual variability was high. The results suggest that removal of shoes produces a rapid alteration in running gait and a potentially-practically-beneficial reduction in oxygen cost of running in some trained-habitually-shod runners new to running barefoot. Individual variation suggests an element of skill in adapting to the novel task. Gait alteration when barefoot is likely the result of increased sense of impact.