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Journal of Sports Medicine and Physical Fitness

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https://www.readbyqxmd.com/read/29327828/the-acute-effects-of-stretching-with-vibration-on-dynamic-flexibility-in-young-female-gymnasts
#1
Aaron W Johnson, Caisa N Warcup, Matthew K Seeley, Dennis Eggett, Jeffery B Feland
BACKGROUND: While stretching with vibration has been shown to improve static flexibility; the effect of stretching with vibration on dynamic flexibility is not well known. The purpose of this study was to examine the effectiveness of stretching with vibration on acute dynamic flexibility and jump height in novice and advanced competitive female gymnasts during a split jump. METHODS: Female gymnast (n=27, age: 11.5 ± 1.7 years, Junior Olympic levels 5-10) participated in this cross-over study...
January 10, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29327827/differences-in-100-m-sprint-performance-and-skeletal-muscle-mass-between-elite-male-and-female-sprinters
#2
Takashi Abe, Scott J Dankel, Samuel L Buckner, Matthew B Jessee, Kevin T Mattocks, J Grant Mouser, Zachary W Bell, Jeremy P Loenneke
BACKGROUND: The sex difference in 100-m sprint performance between the world's best athletes is approximately 10%. We hypothesized that skeletal muscle mass (SM) relative to body mass may be a major factor contributing to this difference. The aim of this study was to examine the sex difference in absolute and relative SM and sprint performance in male and female sprinters. METHODS: We analyzed the SM of male (n=37) and female (n=26) 100-m sprinters; the sample was divided into two subgroups within each sex according to personal best 100-m time: 10...
January 10, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29327826/correlation-between-hypermobility-score-and-injury-rate-in-artistic-gymnastics
#3
Bojan Bukva, Goran Vrgoč, Dejan Madić, Goran Sporiš, Nebojša Trajković
BACKGROUND: Generalized Joint Hypermobility (GJH) is suggested as a contributing factor for injuries in young athletes and adults. It is presumed that GJH causes decreased joint stability, thereby increasing the risk of joint and soft tissue injuries during sports activities. The aim of this study was to determine the correlation between the hypermobility rate (using the Beighton`s modification of the Carter-Wilkinson criteria of hypermobility) in gymnasts and injury rate, during the period of one year...
January 10, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29327825/the-sagittal-spinal-alignment-in-young-swimmers-and-glide-performance-the-importance-of-lumbar-lordosis
#4
Teresa Paolucci, Federico Zangrando, Dario Palladino, Antonio Monaco, Barbara Cordiani, Alice Mannocci, Vincenzo M Saraceni, Ciro Villani
No abstract text is available yet for this article.
January 10, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29327824/are-there-bilateral-isokinetic-shoulder-rotator-differences-in-basketball-male-players
#5
Thierry Weissland, Maryne Cozette, Clare Doyle, Antoine Gabrion
BACKGROUND: The internal (IR) and external (ER) rotator shoulder strength are often assess in the upper limb sports to prevent a risk of injuries. The purpose of this comparative study was to measure the agonist/antagonist balance of shoulder strength and to determine whether significant differences exist between the dominant and nondominant sides in basketball players compared to a control groups. METHODS: During the championship, 23 elite male-basketball players (BB) and 23 healthy males (CG) were tested bilaterally on a Cybex Norm isokinetic dynamometer in a seated position with 45° shoulder abduction in the scapular plane at 60°...
January 10, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29327823/a-previous-hamstring-injury-affects-kicking-mechanics-in-soccer-players
#6
Archit Navandar, Santiago Veiga, Gonzalo Torres, David Chorro, Enrique Navarro
BACKGROUND: Although the kicking skill is influenced by limb dominance and sex, how a previous hamstring injury affects kicking has not been studied in detail. Thus, the objective of this study was to evaluate the effect of sex and limb dominance on kicking in limbs with and without a previous hamstring injury. METHODS: 45 professional players (males: n=19, previously injured players=4, age=21.16 ± 2.00 years; females: n=19, previously injured players=10, age=22...
January 10, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308850/relationship-between-attention-shifting-and-tennis-performance-during-singles-matches
#7
Toru Ishihara, Taizou Kobayashi, Yuta Kuroda, Masao Mizuno
BACKGROUND: Cognitive ability, such as attention shifting, during tennis matches may be associated with players' performance through physical ability, technique, and exercise intensity. However, examinations of the relationship between attention shifting and performance in sport are limited to laboratory settings. The present study examined the relationships between exercise intensity, attention shifting, and tennis performance in singles tennis matches involving university tennis players using a field-based approach...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308849/postactivation-potentiation-effect-of-overloaded-cycling-on-subsequent-cycling-wingate-performance
#8
Kenji Doma, Anthony S Leicht, Moritz Schumann, Akinori Nagata, Kazuma Senzaki, Carl E Woods
BACKGROUND: This study examined the postactivation potentiation effects of overloaded cycling on subsequent Wingate performance. METHODS: Twenty anaerobic-trained men took part in this study. The participants were randomly allocated to complete three testing sessions separated by 7 days. Each week, participants either undertook a control session (CON) consisting of a sub-maximal cycling warm-up protocol followed by a Wingate test, or separate sessions involving an overloaded 10-second cycling PAP protocol followed by a Wingate test at 5 (T5) or 10 (T10) minutes, post-PAP protocol...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308848/test-retest-reliability-and-criterion-validity-of-a-new-taekwondo-anaerobic-intermittent-kick-test
#9
Amel Tayech, Mohamed A Mejri, Helmi Chaabene, Mehdi Chaouachi, David G Behm, Anis Chaouachi
BACKGROUND: The aim of this study was to determine the relative and absolute test-retest reliability and criterion validity of a new Taekwondo anaerobic intermittent kick test (TAIKT). METHODS: Twenty Tunisian elite Taekwondo athletes participated in this study (15 males and 5 females). Participants performed the TAIKT and the Running-based Anaerobic Sprint Test (RAST), twice (test and retest), on separate occasions three-week apart. Peak heart rate (HRpeak), blood lactate concentration [La־], and rating of perceived exertion (RPE) were measured during each session...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308847/comprehensive-overview-of-haemoglobin-mass-and-blood-volume-in-elite-athletes-across-a-wide-range-of-different-sporting-disciplines
#10
Irina Zelenkova, Sergey Zotkin, Pavel Korneev, Sergey Koprov, Alexandr Grushin
BACKGROUND: Comparison of total haemoglobin mass (tHb-mass) and blood volume (BV) across elite athletes different sporting specialisations. METHODS: 222 members of Russian national teams from 12 different disciplines and non Olympic competitive season for tHb-mass, BV, plasma volume (PV), haemoglobin concentration (Hb), and hematocrit level (Hct) determination. tHb-mass measurements were performed using CO-rebreathing technique, alongside Hb and Hct (capillary blood)...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308846/validity-of-oxygen-uptake-cut-off-criteria-in-plateau-identification-during-horizontal-treadmill-running
#11
Clare E Marsh
BACKGROUND: When determining achievement of maximal oxygen uptake (VO2max) during treadmill running using speed increments, theVO2 cut-off criteria applied during plateau identification is often not justified, not protocol specific, or not related to actual change in VO2 (ΔVO2) with speed increment, which can influence plateau achievement rates between studies. The purpose of this study was to compare plateau incidence using an individualised plateau criteria approach based on a 'percentage' ΔVO2 compared to using previously established criteria of ΔVO2≤2...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308845/physiological-and-technical-commitment-during-a-300-m-in-line-skating-trial-in-athletes-of-different-age-categories
#12
Pietro L Invernizzi, Raffaele Scurati, Matteo Crotti, Andrea Bosio, Stefano Longo, Fabio Esposito
BACKGROUND: This study investigated the differences in strength, technique and time performance in in-line skaters of three age categories during a 300 m trial. Possible correlations among these variables were also assessed. METHODS: Thirty-six elite in-line skaters (Cadets, Juniors and Seniors, n=12 each; 14±1, 16±1, and 24±6 years of age, respectively) performed a 300-m trial on an outdoor oval track. Total time (Ttot), 100-m fractions and duration of each skating technique (initial acceleration phase, straight push and cross-over) were recorded...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308844/comparison-between-traditional-strength-training-and-complex-contrast-training-on-soccer-players
#13
Juliano Spineti, Tiago Figueiredo, Jeffrey M Willardson, Viviane Bastos de Oliveira, Marcio Assis, Liliam Fernandes DE Oliveira, Humberto Miranda, Victor Machado de Ribeiro Reis, Roberto Simao
BACKGROUND: The purpose of this study was to compare traditional strength training (TST) versus and contrast training (CCT) on sprint, change of direction speed (COD) and squat jump (SJ) in young male soccer players. METHODS: Twenty-two soccer players (age: 18.4 ± 0.4 years, body mass: 70.2 ± 9.1 kg, height: 179.9 ± 7.5 cm), were randomly assigned to one of two groups: TST (n=12) and CCT (n = 10). The study was conducted using a randomized experimental design over an eight- week period...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308843/associations-between-recreational-runners-anti-inflammatory-drug-use-coping-strategies-and-time-loss-due-to-injury-and-illness-during-preparations-for-a-marathon-event
#14
Bo Tillander, Håkan Gauffin, Örjan Dahlström, Toomas Timpka
BACKGROUND: Due to the dominance of overuse injuries among runners, knowledge of how use of non-steroidal anti-inflammatory drugs (NSAIDs) and behavioural factors contribute to injury events is important. The aim of this study was to explore recreational marathon runners' strategies for coping with injury and illness, including use of drugs for control of pain and inflammation, and to investigate whether these strategies were associated with the 1-year prevalence of time-loss injury and illness...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29308842/effectiveness-evaluation-of-whole-body-electromyostimulation-as-a-post-exercise-recovery-method
#15
Miguel A DE LA Camara, Ana I Pardos, Óscar L Veiga
BACKGROUND: Whole-body electromyostimulation (WB-EMS) devices are now being used in health and sports training, although there are few studies investigating their benefits. The objective of this research was to evaluate the effectiveness of WB-EMS as a post-exercise recovery method, and compare it with other methods like active and passive recovery. METHODS: The study included nine trained men (age = 21 ± 1years, height = 1.77 ± 0.4 m, mass = 62 ± 7 kg). Three trials were performed in three different sessions, 1 week apart...
January 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29249141/effect-of-textured-insoles-on-postural-control-during-static-upright-posture-following-lower-limb-muscle-fatigue
#16
Francesco Palazzo, Alessandra Nardi, Virginia Tancredi, Alfio Caronti, Gianpaolo Scalia Tomba, Pietro Lebone, Elvira Padua, Giuseppe Annino
BACKGROUND: The purpose of this study was to assess the effects of textured insoles on static upright posture before and after lower limb muscle fatigue. Textured insoles used contained small and non-deformable pebbles of various sizes that are able to stimulate a major number of mechanoreceptors. It was inserted inside footwear. METHODS: Ten healthy young adults participated in the study (mean age 26.1 ± 3.07 years). They were asked to stand on a force platform in four sensory states: vision, no vision, with and without natural plantar stimulation...
December 15, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29249140/impact-of-two-hydrogymnastics-class-methodologies-on-the-functional-capacity-and-flexibility-of-elderly-women
#17
Osvaldo Costa Moreira, Grazielle S Lopes, Dihogo G de Matos, Mauro L Mazini-Filho, Felipe J Aidar, Sandro Fernandes da Silva, Claudia E Patrocinio de Oliveira
BACKGROUND: Activities in the aquatic environment can be an interesting alternative of physical exercise for the elderly, due to several properties of water, which can favor the physiological, metabolic, perceptive, and musculoskeletal effects. OBJECTIVE: To compare the effects of performing two hydrogymnastic class methodologies on the functional capacity and flexibility in elderly women. METHODS: 90 women, aged 55-70 years, were divided into three groups, the Control Group (CG; n= 30) who did not exercise during the 12 weeks, Experimental Group 1 (EG1; n= 30), who performed water gymnastics classes with emphasis on lower limb exercises for 12 weeks, and Experimental Group 2 (EG2; n= 30), who performed conventional hydrogymnastics classes for 12 weeks...
December 15, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29199790/injury-epidemiology-in-italian-soccer-football-a-call-for-action
#18
Cristiano Eirale, Piero Volpi, Gian N Bisciotti
No abstract text is available yet for this article.
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29199789/caffeine-acute-static-stretching-and-maximum-knee-flexion-strength
#19
Tyler M Farney, Arnold G Nelson, Joke Kokkonen
BACKGROUND: Reductions in one repetition maximum lifts (1RM) following static stretching can be attributed to enhanced neural inhibition, which can be reduced by using stimulants like caffeine. This study compared knee-flexion 1RM following either static stretching (SS) or no-stretching (NS), as well as after ingesting either caffeine (C) or placebo (P). METHODS: Twenty-four participants (12 female, 12 male) performed four random counterbalanced knee flexion 1RM tests...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29199788/adaptive-thermogenesis-and-changes-in-body-composition-and-physical-fitness-in-army-cadets
#20
Juliano H Borges, Gary R Hunter, Analiza M Silva, Vagner X Cirolini, Raquel D Langer, Mauro A Páscoa, Gil Guerra, Ezequiel M Gonçalves
BACKGROUND: To analyze the association between a 34-week military training on body composition, physical fitness and compensatory changes in resting energy expenditure (REE) recognized as adaptive thermogenesis (AT). We also explored if regional body composition changes were related to AT. METHODS: Twenty-nine male army cadets, aged 17 to 22 years were tested at baseline (T0) and after 34-weeks military training (T1). Physical training was performed 5 days/week during 90 minutes/day...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
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