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Journal of Sports Science & Medicine

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https://www.readbyqxmd.com/read/27928218/differential-effects-of-heavy-versus-moderate-loads-on-measures-of-strength-and-hypertrophy-in-resistance-trained-men
#1
Brad J Schoenfeld, Bret Contreras, Andrew D Vigotsky, Mark Peterson
The purpose of the present study was to evaluate muscular adaptations between heavy- and moderate-load resistance training (RT) with all other variables controlled between conditions. Nineteen resistance-trained men were randomly assigned to either a strength-type RT routine (HEAVY) that trained in a loading range of 2-4 repetitions per set (n = 10) or a hypertrophy-type RT routine (MODERATE) that trained in a loading range of 8-12 repetitions per set (n = 9). Training was carried out 3 days a week for 8 weeks...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928217/effects-of-a-high-protein-and-omega-3-enriched-diet-with-or-without-creatine-supplementation-on-markers-of-soreness-and-inflammation-during-5-consecutive-days-of-high-volume-resistance-exercise-in-females
#2
Sara Hayward, Colin D Wilborn, Lem W Taylor, Stacie L Urbina, Jordan J Outlaw, Cliffa A Foster, Michael D Roberts
We examined if two different dietary interventions affected markers of soreness and inflammation over a 5-day high-volume resistance training protocol in females that resistance-trained 8 weeks prior. Twenty-eight females (age: 20 ± 1 yr; body mass: 63.5 ± 1.6 kg, height: 1.67 ± 0.01 m) completed 4 weeks of pre-training (weeks 1-4) followed by a subsequent 4-week training period along with a dietary intervention (weeks 5-8). Dietary interventions from weeks 5-8 included: a) no intervention (CTL, n = 10) b) a higher-protein diet supplemented with hydrolyzed whey protein (50 g/d) and omega-3 fatty acids (900 mg/d) (DI, n = 8), and c) the DI condition as well as creatine monohydrate (5 g/d) (DI+C, n = 10)...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928216/low-frequency-fatigue-assessed-as-double-to-single-twitch-ratio-after-two-bouts-of-eccentric-exercise-of-the-elbow-flexors
#3
Damian Janecki, Anna Jaskólska, Jarosław Marusiak, Artur Jaskólski
The aim of this study was to assess low-frequency fatigue as a double to single twitch ratio after repeated eccentric exercise of the elbow flexors. Maximal isometric torque, single and double twitch responses and low-frequency fatigue were assessed on the elbow flexors in 16 untrained male volunteers before, immediately after, 24 and 48 hours following two bouts of eccentric exercise consisted of 30 repetitions of lowering a dumbbell adjusted to ~75% of each individual's maximal isometric torque. Maximal isometric torque and electrically evoked responses decreased significantly in all measurements after the first bout of eccentric exercise (p < 0...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928215/anatomic-anterolateral-ligament-reconstruction-improves-postoperative-clinical-outcomes-combined-with-anatomic-anterior-cruciate-ligament-reconstruction
#4
Hua Zhang, Man Qiu, Aiguo Zhou, Jian Zhang, Dianming Jiang
A significant cohort of patients is plagued by postoperative rotational instability after the anatomic anterior cruciate ligament (ACL) reconstruction surgery. Anatomic anterolateral ligament (ALL) reconstruction was performed in this study with the aim to assess the clinical role of ALL in knee's stability and joint functions. Sixty patients were recruited and divided into three groups to perform the operations of anatomic single-bundle ACL reconstruction, anatomic double-bundle ACL reconstruction, and anatomic single-bundle ACL reconstruction + anterolateral ligament reconstruction, respectively...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928214/enhancing-collegiate-women-s-soccer-psychosocial-and-performance-outcomes-by-promoting-intrinsic-sources-of-sport-enjoyment
#5
Scott P Barnicle, Damon Burton
This study examined the effectiveness of an applied mental skills training (MST) intervention utilizing mental skills to enhance intrinsic sources of enjoyment (ISOEs) as a means of promoting self-confidence, motivational style, and athletic performance, while also decreasing trait anxiety. The intervention project was designed to increase intrinsic SOE using a systematic and individualized mental training protocol, and then examine its relationships to mental skills and soccer performance. A Division 1 collegiate women's soccer team was randomly assigned to treatment (n = 8) and control (n = 11) groups, equally distributed by academic year, position, and pre-season coach-evaluated starters and non-starts...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928213/proposal-for-a-specific-aerobic-test-for-football-players-the-footeval
#6
Christophe Manouvrier, Johan Cassirame, Saïd Ahmaidi
The aim of this study was to evaluate the reproducibility and validity of the "Footeval" test, which evaluates football players' aerobic level in conditions close to those of football practice (intermittent, including technical skills). Twenty-four highly trained subjects from an elite football academy (17.8 ± 1.4 years, 5 training sessions per week) performed two Footeval sessions in a period of 7 days. Physiological variables measured during these sessions (VO2max 58.1 ± 5.6 and 58.7 ± 6.2 ml·min(-1)·kg(-1); RER 1...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928212/relationship-between-autonomic-markers-of-heart-rate-and-subjective-indicators-of-recovery-status-in-male-elite-badminton-players
#7
Christo A Bisschoff, Ben Coetzee, Michael R Esco
The primary aim of the study was to determine if heart rate variability (HRV), and heart rate recovery (HRR) are related to several subjective indicators of recovery status (muscle soreness, hydration status, sleep quality and quantity as well as pre-competition mood states) for different match periods in male, elite, African, singles badminton players. HRV and HRR were measured in twenty-two badminton players before (pre-match), during (in-match), after (post-match) and during rest periods (in-match rest) of 46 national and international matches...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928211/use-of-heart-rate-variability-to-estimate-lactate-threshold-in-coronary-artery-disease-patients-during-resistance-exercise
#8
Rodrigo P Simões, Renata G Mendes, Viviane Castello-Simões, Aparecida M Catai, Ross Arena, Audrey Borghi-Silva
The aim of this study was to investigate whether it is possible to identify the first turn point of blood lactate (BL) concentration (1(st) lactate threshold - LT1) during a discontinuous resistance exercise protocol in coronary artery disease (CAD) patients and verify if heart rate variability (HRV) responses are consistent with BL responses. A total of 22 elderly men, 12 with CAD and 10 apparently healthy (control group = CG), underwent one-repetition maximum (1RM) testing on an inclined leg press. Discontinuous resistance exercise testing (DRET) was initiated at 10% of the 1RM with subsequent increases of 10% until 30% and after this percentage, 5% increments of 1RM was carried out...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928210/effects-of-a-whole-body-electrostimulation-program-on-strength-sprinting-jumping-and-kicking-capacity-in-elite-soccer-players
#9
Andre Filipovic, Marijke Grau, Heinz Kleinöder, Philipp Zimmer, Wildor Hollmann, Wilhelm Bloch
The aim of the present study was to investigate the effect of a 14-week dynamic Whole-Body Electrostimulation (WB-EMS) training program on muscular strength, soccer relevant sprint, jump and kicking velocity performance in elite soccer players during competitive season. Twenty-two field-players were assigned to 2 groups: WB-EMS group (EG, n = 12), jump-training group (TG, n = 10). The training programs were conducted twice a week concurrent to 6-7 soccer training sessions during the 2nd half of the season. Participants were tested before (baseline), during (wk-7) and after (wk-14)...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928209/the-value-of-visa-score-and-colour-flow-imaging-in-the-follow-up-of-non-athletes-operated-for-jumpers-knee
#10
Eirik S Salvesen, Ketil J Holen
The objective of this study was to assess if the Victorian Institute of Sport Assessment (VISA) questionnaire was suitable in the evaluation of patients from a mixed population with normal levels of sports activity, and if neovascularization of the patellar tendon demonstrated by color flow imaging (CFI) was more frequent in patients with lasting symptoms after surgical treatment for jumpers knee (JK). This study was conducted at St. Olavs Hospital, University Hospital of Trondheim, Norway, and included 21 men and 18 women who were operated for JK...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928208/the-interaction-of-fatigue-and-potentiation-following-an-acute-bout-of-unilateral-squats
#11
Samantha K Andrews, Jesse M Horodyski, Daniel A MacLeod, Joseph Whitten, David G Behm
A prior conditioning resistance exercise can augment subsequent performance of the affected muscles due to the effects of post-activation potentiation (PAP). The non-local muscle fatigue literature has illustrated the global neural effects of unilateral fatigue. However, no studies have examined the possibility of acute non-local performance enhancements. The objective of the study was to provide a conditioning stimulus in an attempt to potentiate the subsequent jump performance of the affected limb and determine if there were performance changes in the contralateral limb...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928207/the-agt-gene-m235t-polymorphism-and-response-of-power-related-variables-to-aerobic-training
#12
Zarębska Aleksandra, Jastrzębski Zbigniew, Moska Waldemar, Leońska-Duniec Agata, Kaczmarczyk Mariusz, Sawczuk Marek, Maciejewska-Skrendo Agnieszka, Żmijewski Piotr, Ficek Krzysztof, Trybek Grzegorz, Lulińska-Kuklik Ewelina, Ekaterina A Semenova, Ildus I Ahmetov, Cięszczyk Paweł
The C allele of the M235T (rs699) polymorphism of the AGT gene correlates with higher levels of angiotensin II and has been associated with power and strength sport performance. The aim of the study was to investigate whether or not selected power-related variables and their response to a 12-week program of aerobic dance training are modulated by the AGT M235T genotype in healthy participants. Two hundred and one Polish Caucasian women aged 21 ± 1 years met the inclusion criteria and were included in the study...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928206/doping-attitudes-and-covariates-of-potential-doping-behaviour-in-high-level-team-sport-athletes-gender-specific-analysis
#13
Damir Sekulic, Enver Tahiraj, Milan Zvan, Natasa Zenic, Ognjen Uljevic, Blaz Lesnik
Team sports are rarely studied with regard to doping behaviour and doping-related factors regardless of their global popularity. This study aimed to investigate doping factors and covariates of potential doping behaviour in high-level team-sport athletes. The subjects were 457 high-performing, national- and international-level athletes (21.9 ± 3.4 years of age; 179 females) involved in volleyball (n = 77), soccer (n = 163), basketball (n = 114) and handball (n = 103). Previously validated self-administered questionnaires aimed at evidencing sport factors, doping-related factors, knowledge on sport nutrition and doping, and attitudes to performance enhancement were used...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928205/sleep-quality-mood-and-performance-a-study-of-elite-brazilian-volleyball-athletes
#14
Alexandro Andrade, Guilherme G Bevilacqua, Danilo R Coimbra, Fabiano S Pereira, Ricardo Brandt
This investigation analyzed the relationships between sleep quality, mood, and game results in the elite athletes participating in Brazilian volleyball competitions. Participants (n = 277 elite Brazilian volleyball athletes, 214 (77.3%) men and 63 (22.7%) women) completed the Brunel Mood Scale (BRUMS) and reported their subjective sleep perception. Athletes with poor sleep quality reported higher scores for confusion compared to athletes with good sleep quality (p < 0.01, d = 0.43). In addition, athletes who lost their game at the time of evaluation showed higher tension (p < 0...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928204/a-feasibility-study-related-to-inactive-cancer-survivors-compared-with-non-cancer-controls-during-aerobic-exercise-training
#15
Scott N Drum, Riggs J Klika, Susan D Carter, Lisa K Sprod, Lars Donath
Cancer survivors (CA) tend to demonstrate metabolic, cardiac, and ventilatory alterations due to previous chemotherapy and radiation that may impair adaptability following aerobic exercise training. Exercise training adaptations of CA finished with primary treatment compared to non-cancer participants (NC) have not yet been extensively elucidated. Thus, the present study compared physiologic responses of CA versus NC following a low-to-moderate intensity, 8-wk aerobic training program. Thirty-seven previously sedentary participants (CA: n = 14, 12 females; NC: n = 23, 19 females) with no heart or metabolic disease did not differ in age, height, weight, and body mass index (51 ± 2 y, 1...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928203/accelerometer-load-profiles-for-basketball-specific-drills-in-elite-players
#16
Xavi Schelling, Lorena Torres
The purpose of this study was to quantify the workload during basketball-specific drills measured through microtechnology. Twelve professional male basketball players from the Spanish 1(st) Division were monitored over a 4-week period. Data were collected from 16 sessions, for a total of 95 ± 33 drills per player. Workload data (Acceleration load; AL) were obtained from a tri-axial accelerometer at 100Hz sampling frequency, and were expressed over time (AL(.)min(-1)). Comparisons among training drills (i.e...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928202/effects-of-short-term-carbohydrate-restrictive-and-conventional-hypoenergetic-diets-and-resistance-training-on-strength-gains-and-muscle-thickness
#17
Claudia M Meirelles, Paulo S C Gomes
: Hypoenergetic diets and resistance training (RT) have been suggested to be important components of weight loss strategy programs; however, there is little evidence as to the chronic effects of different macronutrient compositions on strength performance and muscle mass with RT. The purpose of this study was to compare the effects of carbohydrate restrictive (CRD) and conventional (CONV) diets combined with RT on strength performance and muscle thicknesses in overweight and obese participants already involved in RT programs...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928201/sport-education-and-direct-instruction-units-comparison-of-student-knowledge-development-in-athletics
#18
José Pereira, Rui Araújo, Cláudio Farias, Cristiana Bessa, Isabel Mesquita
This study conducted a comparative analysis of students' knowledge development on athletics in Sport Education and in a Direct Instruction unit taking into account sex and initial skill level. The participants were an experienced Physical Education teacher and two sixth-grade classes totaling 47 students (25 boys and 22 girls). Each class was randomly placed in either Sport Education or Direct Instruction classes and participated in 20, 45-minutes lessons focused on shot put, hurdles and triple jump. Knowledge on athletics was assessed through a 25-items written and video-based test...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928200/effects-of-the-drop-set-and-reverse-drop-set-methods-on-the-muscle-activity-and-intramuscular-oxygenation-of-the-triceps-brachii-among-trained-and-untrained-individuals
#19
Masahiro Goto, Shinsuke Nirengi, Yuko Kurosawa, Akinori Nagano, Takafumi Hamaoka
Influence of different load exercise to muscle activity during subsequent exercise with 75% of one repetition maximum (RM) load among trained and untrained individuals was verified. Resistance-trained men who were involved in resistance training (n = 16) and healthy young men who did not exercise regularly (n = 16) were recruited for this study. Each subject performed bench pressing with a narrow grip exercise using two different training set methods, the drop-set (DS) (3 sets × 2-10 repetitions with 95-75% of 1RM) and the reverse drop-set (RDS) (3 sets × 3-10 repetitions with 55-75% of 1RM)...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27928199/association-of-anxiety-related-polymorphisms-with-sports-performance-in-chilean-long-distance-triathletes-a-pilot-study
#20
Jorge A Sanhueza, Tomás Zambrano, Carlos Bahamondes-Avila, Luis A Salazar
Different factors affecting athletic performance are well established: intensity and type of training, anthropometric characteristics as well as an important psychological component. However, the contribution of the genetic background has been less investigated. The aim of the present study was to investigate the influence of polymorphisms within genes associated with stress and anxiety (5HTT, CRH2R, ACE, NK1R, 5HT1AR and CRF-BP) on the physical capability and sports performance in triathletes. One hundred and ninety two (192) unrelated Chilean triathletes who participated in the 2014 70...
December 2016: Journal of Sports Science & Medicine
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