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Research in Sports Medicine

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https://www.readbyqxmd.com/read/29388441/corrigendum
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February 1, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29384020/influence-of-warm-up-duration-on-physical-performance-and-psychological-perceptions-in-handball-players
#2
Estibaliz Romaratezabala, Fábio Yuzo Nakamura, Daniel Castillo, Ilargi Gorostegi-Anduaga, Javier Yanci
The purpose of the study was to analyse the effect of two warm-up protocols of different duration on physical performance, perceived load and perception of being ready for a match in handball players. Eighteen handball players were randomly divided into two groups (Wup34min, warm-up protocol of 34 min, Wup17min, warm-up protocol of 17 min). Before and after the warm-up protocols, they performed a battery of physical tests and recorded their perception of feeling ready for a match. At the end of the warm-up protocols, all the players evaluated their differentiated perceived effort (dRPE)...
January 31, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29382229/key-team-physical-and-technical-performance-indicators-indicative-of-team-quality-in-the-soccer-chinese-super-league
#3
Gai Yang, Anthony S Leicht, Carlos Lago, Miguel-Ángel Gómez
The aim of this study was to identify the key physical and technical performance variables related to team quality in the Chinese Super League (CSL). Teams' performance variables were collected from 240 matches and analysed via analysis of variance between end-of-season-ranked groups and multinomial logistic regression. Significant physical performance differences between groups were identified for sprinting (top-ranked group vs. upper-middle-ranked group) and total distance covered without possession (upper and upper-middle-ranked groups and lower-ranked group)...
January 31, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29378427/ultra-obligatory-running-among-ultramarathon-runners
#4
Martin D Hoffman, Rhonna Krouse
Participants in the Ultrarunners Longitudinal TRAcking (ULTRA) Study were asked to answer "yes" or "no" to the question "If you were to learn, with absolute certainty, that ultramarathon running is bad for your health, would you stop your ultramarathon training and participation?" Among the 1349 runners, 74.1% answered "no". Compared with those answering "yes", they were younger (p < 0.0001), less likely to be married (p = 0.019), had less children (p = 0.0095), had a lower health orientation (p < 0...
January 29, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29376416/influence-of-well-being-variables-and-recovery-state-in-physical-enjoyment-of-professional-soccer-players-during-small-sided-games
#5
Okba Selmi, Bruno Gonçalves, Ibrahim Ouergui, Jaime Sampaio, Anissa Bouassida
This study aimed to assess the effects of the total quality of recovery and well-being indices (self-ratings of sleep during the preceding night, stress, fatigue and delayed onset muscle soreness) on rating of perceived exertion (RPE) and physical enjoyment (PE) during small-sided games. A total of 20 professional soccer players (25 ± 0.8 years) completed four 5-a-side game sessions of 25-min duration each (4 × 4 min work with 3-min passive recovery in-between). All variables were collected before each game session with the exception of RPE and Physical Activity Enjoyment Scale that were collected after...
January 28, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29376410/mode-of-physical-activity-participation-by-body-mass-index-2015-behavioural-risk-factor-surveillance-system
#6
James R Churilla, Tammie M Johnson, M Ryan Richardson, Bethany D Williams, Brandi S Rariden, Adrian J Boltz
Body mass index (BMI) continues to be used as a marker of health due its strong correlation with adiposity and health. Physical activity (PA) has been shown to be favourably associated with a desirable BMI. Few studies have examined mode of PA participation across BMI indices with a mutually exclusive underweight BMI range. The purpose of this study was to examine the relationship between modes of PA and BMI. Data from the 2015 Behavioral Risk Factor Surveillance System was analysed. Underweight, overweight, and obese BMI categories possessed 35, 20, and 46% lower odds of meeting current PA guidelines...
January 28, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29366354/dietary-habits-and-energy-balance-in-an-under-21-male-international-soccer-team
#7
Dorianne Bonnicci, Ibrahim Akubat, Matthew Greig, Andy Sparks, Lars R Mc Naughton
Soccer presents a metabolic challenge which is not necessarily matched by players' habitual dietary intake. To examine the effects of a bespoke diet, 22 players completed the Ball Sport Endurance and Sprint Test (BEAST90mod) protocol, followed by 4 days of regulated nutritional intake. The diet consisted of 10 g∙kg-1 body mass (BM) and 1.7 g∙kg-1 BM of carbohydrate and protein, respectively. On day 5, players followed a prematch nutritional strategy of 7 g∙kg-1 BM of carbohydrate and 1 g∙kg-1 BM of protein divided into three meals and then repeated the BEAST90mod...
January 25, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29366355/direct-player-observation-is-needed-to-accurately-quantify-heading-frequency-in-youth-soccer
#8
Alexandra Harriss, David M Walton, James P Dickey
In soccer, heading may be related to subsequent neurological impairment. Accurate measures of heading exposure are therefore important. This study evaluated whether 12 female youth players accurately recalled their average number of headers over an entire soccer season (20 games total). Their self-reported average number of headers per game was multiplied by the number of games that they participated in, and were compared to actual number of headers extracted from game video. All players overestimated the number of headers compared to game video...
January 24, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29366340/effects-of-strength-exercise-on-the-knee-and-ankle-proprioception-of-individuals-with-knee-osteoarthritis
#9
Zhangqi Lai, Yu Zhang, Seullee Lee, Lin Wang
This study aims to investigate the effects of 8-week strength exercise on knee and ankle proprioception of individuals with knee osteoarthritis (KOA). Forty participants were randomly divided into control and strength exercise groups. Strength exercise group underwent squat training of three times a week for 8 weeks, while control group received an education programme. Threshold for detection of passive movement of knee and ankle joint was tested using an electrically driven movable frame. Between- and within-group differences were evaluated through repeated-measurement analysis of variance...
January 24, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29363348/reliability-of-internal-and-external-load-parameters-in-recreational-football-soccer-for-health
#10
Marco Beato, Mikael Jamil, Gavin Devereux
There is limited research focussed around the analysis of internal and external load parameters during football health programmes. The aim of this study was to assess the reliability of internal and external load parameters in this activity. Thrity subjects were enrolled (mean ± SDs; age = 43 ± 3 years, weight = 84 ± 14 kg, height = 176 ± 7 cm, BMI = 27.1 ± 3, VO2max = 40.7 ± 3.4 ml.kg.min-1). The football matches (five a-side) took place on an artificial grass outdoor field (pitch size of 36 × 18...
January 24, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29361835/activity-monitoring-in-men-s-college-soccer-a-single-season-longitudinal-study
#11
Lindsay V Slater, Ryan Baker, Arthur L Weltman, Jay Hertel, Susan A Saliba, Joseph M Hart
Performance in soccer has been characterized previously using time-motion analyses; however, it is unclear if men's college soccer shares performance characteristics with women's college or men's professional soccer. The purpose of this study was to compare proportions of matches spent walking, jogging, running, and sprinting in men's college soccer. Twenty-two male college soccer players wore global positioning system units during matches. Proportions of walking, jogging, running, high-speed running, and sprinting were calculated for each player based on time period (first half, second half, extra time) and outcome (win, loss, tie)...
January 23, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29359592/performance-and-physiological-analysis-of-500-km-non-stop-cycling-a-case-study
#12
Pedro L Valenzuela, Carl Foster, Alejandro Lucía, Pedro de la Villa
Ultra-endurance sports have gained popularity over the last years. In this case, a well-trained cyclist completed 503.5 km non-stop (33.3 km.h-1). Speed and power output were reduced during the trial, being the reduction of power attributable to changes in pedal velocity rather than pedal forces. Heart rate (HR) showed an initial cardiovascular drift and progressively decreased independently of power. A decreased HR variability, a marked inflammatory response, signs of muscle damage and alterations of the haematological profile were observed after the trial...
January 23, 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29067818/kinetics-of-the-lower-limb-during-two-typical-tai-chi-movements-in-the-elderly
#13
Jing Xian Li, Nok-Yeung Law
Tai Chi (TC) is a recommended exercise for elderly people; however, its loading on the joints of the lower limbs is unknown. This study examined the 3D kinetics of the lower limbs during two typical TC movements and walking in the elderly. Fifteen experienced TC practitioners participated. Ground reaction forces, joint moments and time-to-peak joint moment generation were analysed. Compared with walking, both TC movements generated significantly (1) smaller peak ground reaction forces in all directions, except the anterior; (2) larger hip extension, adduction and internal rotational moments, knee adduction/abduction and internal rotation moments and eversion/inversion and external/internal moments of ankle-foot; and (3) longer peak moment generation time for hip extension, adduction and internal rotation, knee extension and ankle dorsiflexion and inversion...
January 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/28869402/the-epidemiology-of-back-neck-spine-injuries-in-national-collegiate-athletic-association-men-s-and-women-s-ice-hockey-2009-2010-to-2014-2015
#14
Alyssa B Zupon, Zachary Y Kerr, Sara L Dalton, Thomas P Dompier, Elizabeth C Gardner
This study describes the epidemiology of back/neck/spine injuries in National Collegiate Athletic Association (NCAA) men's and women's ice hockey. Data from 66 NCAA men's and 29 women's ice hockey programmes (total of 147 and 67 team-seasons, respectively) were analysed from the NCAA Injury Surveillance Program during the 2009/2010-2014/2015 academic years. In the study period, 226 and 97 back/neck/spine injuries were reported in men and women, respectively, for injury rates of 0.56 and 0.65/1000 athlete exposures...
January 2018: Research in Sports Medicine
https://www.readbyqxmd.com/read/29082755/influence-of-different-types-of-compression-garments-on-exercise-induced-muscle-damage-markers-after-a-soccer-match
#15
Diego Marqués-Jiménez, Julio Calleja-González, Iñaki Arratibel-Imaz, Anne Delextrat, Fernando Uriarte, Nicolás Terrados
There is not enough evidence of positive effects of compression therapy on the recovery of soccer players after matches. Therefore, the objective was to evaluate the influence of different types of compression garments in reducing exercise-induced muscle damage (EIMD) during recovery after a friendly soccer match. Eighteen semi-professional soccer players (24 ± 4.07 years, 177 ± 5 cm; 71.8 ± 6.28 kg and 22.73 ± 1.81 BMI) participated in this study. A two-stage crossover design was chosen. Participants acted as controls in one match and were assigned to an experimental group (compression stockings group, full-leg compression group, shorts group) in the other match...
October 30, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/29067854/sex-and-age-related-differences-in-half-marathon-performance-and-competitiveness-in-the-world-s-largest-half-marathon-the-g%C3%A3-teborgsvarvet
#16
B Knechtle, P T Nikolaidis
In road runners, the age-related performance decline has been well investigated for marathoners, but little is known for half-marathoners. We analysed data from 138,616 runners (48,148 women and 90,469 men) competing between 2014 and 2016 in GöteborgsVarvet, the world's largest half-marathon. The men-to-women ratio in participants increased with age, the fastest race times were observed in age groups ˂35 and 35-39 years in women and in age group 35-39 years in men, the main effect of sex and the sex × age group interaction on race time were trivial, and the competitiveness was denser in men and in the younger age groups...
October 25, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/29067816/sex-and-age-differences-in-head-acceleration-during-purposeful-soccer-heading
#17
Jaclyn B Caccese, Thomas A Buckley, Ryan T Tierney, William C Rose, Joseph J Glutting, Thomas W Kaminski
Differences in head-neck segment mass, purposeful heading technique, and cervical strength and stiffness may contribute to differences in head accelerations across sex and age. The purpose of this study was to compare head acceleration across sex and age (youth [12-14 years old], high school and collegiate) during purposeful soccer heading. One-hundred soccer players (42 male, 58 female, 17.1 ± 3.5 years, 168.5 ± 20.3 cm, 61.5 ± 13.7 kg) completed 12 controlled soccer headers at an initial ball velocity of 11...
October 25, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/29064298/investigating-achilles-and-patellar-tendinopathy-prevalence-in-elite-athletics
#18
Ina Janssen, Henk van der Worp, Sjoerd Hensing, Johannes Zwerver
Although injury surveillance in athletics is routinely conducted, discipline-specific Achilles and patellar tendinopathy prevalence remains unknown. The purpose of this study was to explore discipline-specific tendinopathy prevalence and identify whether injury-specific risk factors differed in athletes. Elite athletes were recruited and provided information on their sport training including Achilles and patellar tendon pain history. In order to ascertain whether between-discipline differences existed, data were categorized into discipline groups...
October 24, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/29064284/pacing-in-age-group-marathoners-in-the-new-york-city-marathon
#19
Pantelis T Nikolaidis, Beat Knechtle
The aim of the study was to investigate how women and men age group runners pace during a large city marathon. We analysed changes in running speed by splits of 5 km in 20,283 women and 28,282 men age group runners competing in the 2015 edition of the "New York City Marathon". A moderate split×sex interaction on running speed (p < 0.001, η(2) = 0.108) was observed with men showing a larger decrease in speed from the fastest split (5-10 km) to the slowest one (35-40 km) than women (21.1 vs. 16.7%), and a different pattern was observed in the 25-30 km split (increase in women, decrease in men)...
October 24, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/29058470/combined-visual-and-dribbling-performance-in-young-soccer-players-of-different-expertise
#20
Evangelos Bekris, Ioannis Gissis, Ioannis Ispyrlidis, Eleftherios Mylonis, Georgia Axeti
We aimed to evaluate dribbling performance in terms of technique and visual skills assessment of both young experienced (EX, n = 24) and novice (NO, n = 24) soccer players. Both groups performed two dribbling tests with four levels of difficulty in visual signals (A1-A4 and B1-B4; B - half distance of A; 1 - no visual signal; 4 - signal with the shorter flashing time). All players performed slower when visual signals were added to the testing process (~2.5 s; p < 0.01). EX completed all tests faster than NO (~3 s, p < 0...
October 23, 2017: Research in Sports Medicine
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