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https://www.readbyqxmd.com/read/28344452/the-effects-of-a-sports-nutrition-education-intervention-on-nutritional-status-sport-nutrition-knowledge-body-composition-and-performance-during-off-season-training-in-ncaa-division-i-baseball-players
#1
Fabrício Eduardo Rossi, Andrew Landreth, Stacey Beam, Taylor Jones, Layne Norton, Jason Michael Cholewa
This study investigated the effects of a sport nutrition education intervention (SNEI) on dietary intake, knowledge, body composition, and performance in NCAA Division I baseball players. Resistance trained NCAA Division I baseball players (82.4 ± 8.2 kg; 1.83 ± 0.06 m; 13.7 ± 5 % body fat) participated in the study during 12 weeks of off-season training. Fifteen players volunteered for SNEI while 15 players matched for position served as controls (C) for body composition and performance. The nutrition intervention group (NI) received a 90 min SNEI encompassing energy intake (Kcal), carbohydrate (CHO), protein (PRO), fat, food sources, and hydration...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28342723/effects-of-eccentric-overload-training-on-patellar-tendon-and-vastus-lateralis-in-three-days-of-consecutive-running
#2
Fernando Sanz-López, César Berzosa, Fidel Hita-Contreras, Antonio Martínez-Amat
BACKGROUND: The analysis of structural changes in patellar tendon and muscle of healthy subjects in response to mechanical loads provides useful insight into the mechanism underlying overuse injuries. METHODS: Changes produced in tendon and muscles structures after eccentric overload training and three consecutive running days were examined. Twenty healthy subjects were recruited and divided into two groups. One group (ECC) performed eccentric overload squat training (six weeks)...
March 22, 2017: Knee
https://www.readbyqxmd.com/read/28340491/comparison-of-skillful-vs-less-skilled-young-soccer-players-on-anthropometric-maturation-physical-fitness-and-time-of-practice
#3
Márcio André de Gouvêa, Edilson Serpeloni Cyrino, João Valente-Dos-Santos, Alex Silva Ribeiro, Danilo Rodrigues Pereira da Silva, David Ohara, Manuel J Coelho-E-Silva, Enio Ricardo Vaz Ronque
This study compared maturation, body composition and physical fitness between youth soccer athletes with different technical skills levels. Sixty-two young athletes (11-17 years) were categorized dichotomously in more skilled (n=31) and less skilled (n=31) groups based on 3 specific technical tests (Dribbling Speed Test [DST], Shuttle Dribble Test [SDT] and Slalom Dribble Test [SLDT]). Chronological and skeletal age, time of practice, body composition and 4 physical fitness tests were performed for comparisons...
March 24, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28339350/the-effect-of-initial-knee-angle-on-concentric-only-squat-jump-performance
#4
Lachlan J Mitchell, Christos K Argus, Kristie-Lee Taylor, Jeremy M Sheppard, Dale W Chapman
PURPOSE: There is uncertainty as to which knee angle during a squat jump (SJ) produces maximal jump performance. Importantly, understanding this information will aid in determining appropriate ratios for assessment and monitoring of the explosive characteristics of athletes. METHOD: This study compared SJ performance across different knee angles-90º, 100º, 110º, 120º, 130º, and a self-selected depth-for jump height and other kinetic characteristics. For comparison between SJ and an unconstrained dynamic movement, participants also performed a countermovement jump from a self-selected depth...
March 24, 2017: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/28338528/perceptual-mechanical-and-electromyographic-responses-to-different-relative-loads-in-the-parallel-squat
#5
Mark Chapman, Eneko Larumbe-Zabala, Mark Gosss-Sampson, Mark Colpus, N Travis Triplett, Fernando Naclerio
The effectiveness of the OMNI-RES (0-10) and the electromyographic signal for monitoring changes in the movement velocity was examined during a set to muscular failure using different percentages of one repetition maximum (1RM) in the parallel squat exercise (PSQ). Twelve males (26.3 ± 5.8 years) were evaluated on eight separate days with 48 hours of rest between sessions. After determining the 1RM value, participants underwent seven tests until achieving muscular failure with the following percentage ranges: 30 to <40%; 40 to <50%, 50 to <60%, 60% to <70%, 70 to <80%, 80 to <90% and >90%...
March 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28338423/assessment-of-leg-muscles-mechanical-capacities-which-jump-loading-and-variable-type-provide-the-most-reliable-outcomes
#6
Amador García-Ramos, Belén Feriche, Alejandro Pérez-Castilla, Paulino Padial, Slobodan Jaric
This study aimed to explore the strength of the force-velocity (F-V) relationship of lower limb muscles and the reliability of its parameters (maximum force [F0], slope [a], maximum velocity [V0], and maximum power [P0]). Twenty-three men were tested in two different jump types (squat and countermovement jump: SJ and CMJ), performed under two different loading conditions (free weight and Smith machine: Free and Smith) with 0, 17, 30, 45, 60, and 75 kg loads. The maximum and averaged values of F and V were obtained for the F-V relationship modelling...
March 24, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28338357/neuromuscular-fatigue-after-repeated-jumping-with-concomitant-electrical-stimulation
#7
Daria Neyroud, Jimmy Samararatne, Bengt Kayser, Nicolas Place
PURPOSE: We evaluated the etiology and extent of neuromuscular fatigue induced by fifty squat jumps performed with and without neuromuscular electrical stimulation (NMES) of the knee extensors. METHODS: Nine healthy recreationally active males (24 ± 2 years old) took part in two experiments. These consisted of fifty squat jumps performed with stimulation (NMES) or without (CON). Maximal voluntary contraction (MVC) force, maximal voluntary activation level (VAL) and forces evoked by single and double (10 and 100 Hz) stimulations were recorded before and after the fifty jumps...
March 24, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28328713/the-effect-of-standard-strength-vs-contrast-strength-training-on-the-development-of-sprint-agility-repeated-change-of-direction-and-jump-in-junior-male-soccer-players
#8
Mehréz Hammami, Yassine Negra, Roy J Shephard, Mohamed Souhaiel Chelly
Hammami, M, Negra, Y, Shephard, RJ, and Chelly, MS. The effect of standard strength vs. contrast strength training on the development of sprint, agility, repeated change of direction, and jump in junior male soccer players. J Strength Cond Res 31(4): 901-912, 2017-The aim was to compare the impact of 2 differing strength training (ST) programs on the athletic performance of junior male soccer players at a critical phase during their competitive season. Participants aged 16.0 ± 0.5 years were randomly assigned between control (C, n = 12), standard ST (n = 16), and contrast strength training (CST, n = 16), each performed twice a week...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28326414/minimum-5-year-follow-up-results-and-functional-outcome-of-rotating-platform-high-flexion-total-knee-arthroplasty-a-prospective-study-of-701-knees
#9
Sanjeev Jain, Aditya C Pathak, K Kalaivanan
BACKGROUND: To evaluate the midterm clinical outcome, functional outcome, associated complications, and survivorship of high-flexion posterior-stabilized rotating-platform total knee arthroplasty. METHODS: We prospectively analyzed 701 knees in 501 patients, who underwent total knee arthroplasty using high-flexion posterior-stabilized rotating-platform prosthesis. Patients were assessed preoperatively and postoperatively for their ability to kneel, do full squats, do half squats, and sit cross-legged by using a patient-administered questionnaire...
September 2016: Arthroplast Today
https://www.readbyqxmd.com/read/28326351/effects-of-low-dose-ibuprofen-supplementation-and-resistance-training-on-bone-and-muscle-in-postmenopausal-women-a-randomized-controlled-trial
#10
Whitney R D Duff, Saija A Kontulainen, Darren G Candow, Julianne J Gordon, Riley S Mason, Regina Taylor-Gjevre, Bindu Nair, Michael Szafron, Adam D G Baxter-Jones, Gordon A Zello, Philip D Chilibeck
PURPOSE: To compare the effects of nine months of exercise training and ibuprofen supplementation (given immeditately after exercise sessions) on bone and muscle in postmenopausal women. METHODS: In a double-blind randomized trial, participants (females: n = 90, mean age 64.8, SD 4.3 years) were assigned (computer generated, double blind) to receive supervised resistance training or stretching 3 days/week, and ibuprofen (400 mg, post-exercise) or placebo (i...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28326310/cardiopulmonary-response-during-whole-body-vibration-training-in-patients-with-severe-copd
#11
Rainer Gloeckl, Petra Richter, Sandra Winterkamp, Michael Pfeifer, Christoph Nell, Jeffrey W Christle, Klaus Kenn
Several studies in patients with chronic obstructive pulmonary disease (COPD) have shown that whole-body vibration training (WBVT) has beneficial effects on exercise capacity. However, the acute cardiopulmonary demand during WBVT remains unknown and was therefore investigated in this study. Ten patients with severe COPD (forced expiratory volume in 1 s: 38±8% predicted) were examined on two consecutive days. On day one, symptom-limited cardiopulmonary exercise testing was performed on a cycle ergometer. The next day, six bouts of repeated squat exercises were performed in random order for one, two or three minutes either with or without WBVT while metabolic demands were simultaneously measured...
January 2017: ERJ Open Research
https://www.readbyqxmd.com/read/28316261/effects-of-different-strength-training-frequencies-during-reduced-training-period-on-strength-and-muscle-cross-sectional-area
#12
Lucas Duarte Tavares, Eduardo Oliveira de Souza, Carlos Ugrinowitsch, Gilberto Candido Laurentino, Hamilton Roschel, André Yui Aihara, Fabiano Nassar Cardoso, Valmor Tricoli
This study investigated the effects of different reduced strength training (RST) frequencies on half-squat 1 RM and quadriceps cross-sectional area (QCSA). Thirty-three untrained males (24.7 ± 3.9 years; 1.73 ± 0.08 m; 74.6 ± 8.4 kg) underwent a 16-week experimental period (i.e. eight weeks of strength training [ST] followed by additional eight weeks of RST). During the ST period, the participants performed 3-4 sets of 6-12 RM, three sessions/week in half-squat and knee extension exercises...
March 19, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28314055/localization-of-muscle-damage-within-the-quadriceps-femoris-induced-by-different-types-of-eccentric-exercises
#13
Sumiaki Maeo, Akira Saito, Shun Otsuka, Xiyao Shan, Hiroaki Kanehisa, Yasuo Kawakami
This study examined localization of muscle damage within the quadriceps femoris induced by different types of eccentric exercises by using transverse relaxation time (T2 )-weighted magnetic resonance imaging (MRI). Thirty-three young males performed either of the following three exercises: single-joint eccentric contraction of the knee extensors (KE), eccentric squat (S), or downhill walking (DW) (n=11/exercise). KE and S consisted of 5-set × 10-lowering of 90% one-repetition maximum load. DW was performed for 60 min with -10% slope, 6 km/h velocity, and 20% body mass load carried...
March 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28303397/association-of-the-baltic-sea-and-mediterranean-diets-with-indices-of-sarcopenia-in-elderly-women-osptre-fps-study
#14
Masoud Isanejad, Joonas Sirola, Jaakko Mursu, Toni Rikkonen, Heikki Kröger, Marjo Tuppurainen, Arja T Erkkilä
PURPOSE: To examine whether higher adherence to Baltic Sea diet (BSD) and Mediterranean diet (MED) have beneficial association with sarcopenia indices in elderly women. METHODS: In total 554 women, aged 65-72 years belonging to OSTPRE-FPS study answered a questionnaire on lifestyle factors and 3-day food record at baseline in 2002. Food consumptions and nutrient intakes were calculated. Nine components were selected to calculate BSD score. MED score was calculated using eight components...
March 16, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28301442/effect-of-ankle-mobility-and-segment-ratios-on-trunk-lean-in-the-barbell-back-squat
#15
Emil Isager Fuglsang, Anders Stampe Telling, Henrik Sørensen
The barbell back squat is a popular exercise used for both performance enhancing and rehabilitation purposes. However, injuries are common and people with a history of lower back pain are especially vulnerable. Past studies have shown that higher trunk angles (less forward lean) generate less stress on the lower back; thus, it seems appropriate to investigate the factors presumed to influence the trunk angle. Therefore, the aim in this study was to investigate how ankle mobility and the segment ratios between the thoracic spine, thighs and shanks influence the trunk angle in the back squat...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28301435/different-cluster-sets-result-in-similar-metabolic-endocrine-and-perceptual-responses-in-trained-men
#16
James J Tufano, Jenny A Conlon, Sophia Nimphius, Jonathan M Oliver, Andreas Kreutzer, G Gregory Haff
The purpose of this study was to compare the kinematic, metabolic, endocrine, and perceptual responses of three back squat protocols with equal loads, number of repetitions, and total rest duration. Eight strength-trained men performed 36 back squats using 75% 1RM and 420 s of total rest during basic cluster sets of 4 (CS4), rest-redistribution sets of 4 (RR4), and rest-redistribution sets of 1 (RR1). Ratings of perceived exertion (RPE), blood lactate (La), mean velocity maintenance (MVM), and mean velocity loss (MVL) were measured during exercise...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28292885/heavy-strength-training-improves-running-and-cycling-performance-following-prolonged-submaximal-work-in-well-trained-female-athletes
#17
Olav Vikmoen, Bent R Rønnestad, Stian Ellefsen, Truls Raastad
The purpose of this study was to investigate the effects of adding heavy strength training to female duathletes' normal endurance training on both cycling and running performance. Nineteen well-trained female duathletes (VO2max cycling: 54 ± 3 ml∙kg(-1)∙min(-1), VO2max running: 53 ± 3 ml∙kg(-1)∙min(-1)) were randomly assigned to either normal endurance training (E, n = 8) or normal endurance training combined with strength training (E+S, n = 11). The strength training consisted of four lower body exercises [3 × 4-10 repetition maximum (RM)] twice a week for 11 weeks...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28292355/evaluation-of-the-sensitivity-and-specificity-of-the-new-clinical-diagnostic-and-classification-criteria-for-kashin-beck-disease-an-endemic-osteoarthritis-in-china
#18
Fang Fang Yu, Zhi Guang Ping, Chong Yao, Zhi Wen Wang, Fu Qi Wang, Xiong Guo
This study aimed to evaluate the sensitivity and specificity of the new clinical diagnostic and classification criteria for Kashin-Beck disease (KBD) using six clinical markers: flexion of the distal part of fingers, deformed fingers, enlarged finger joints, shortened fingers, squat down, and dwarfism. One-third of the total population in Linyou County was sampled by stratified random sampling. The survey included baseline characteristics and clinical diagnoses, and the sensitivity and specificity of the new criteria was evaluated...
February 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28291764/delayed-effects-of-a-low-volume-power-type-resistance-exercise-session-on-explosive-performance
#19
Athanasios Tsoukos, Panagiotis Veligekas, Lee E Brown, Gerasimos Terzis, Gregory C Bogdanis
This study examined the delayed effects of a power type training session on explosive performance. Seventeen well-trained male power and team sport athletes (age: 22.7±5.5 y, height: 181±8 cm, body mass: 80.7±8.6 kg, body fat: 9.2±1.7 %, 1-RM half-squat: 163±29 kg) performed four sessions (2 experimental and 2 control) one week apart in a randomized and counterbalanced order. Explosive performance was assessed before, 24 and 48 h following a low-volume, power-type training session (5 x 4 jump squats at 40% 1RM with 3 min rest), as well as before and after 24 and 48 h of rest (control)...
January 24, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28290757/hip-musculoskeletal-conditions-and-associated-factors-that-influence-squat-performance-a-systematic-review
#20
Scott W Cheatham, Kyle R Stull, Mike Fantigrassi, Ian Montel
CONTEXT: The squat is a fundamental movement for weight lifting and sports performance. Both unilateral and bilateral squats are also used to assess transitional and dynamic lower extremity control. Common lower extremity conditions can have an influence on squat performance. Of interest, are the effects of hip musculoskeletal conditions and associated factors such as hip muscle pain, fatigue, and tightness on squat performance. Currently, there has been no appraisal of the evidence regarding the association of these conditions and associated factors on squat performance...
March 14, 2017: Journal of Sport Rehabilitation
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