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https://www.readbyqxmd.com/read/28394832/strength-and-conditioning-training-by-the-danish-national-handball-team-prior-to-an-olympic-tournament
#1
Thue Kvorning, Mikkel R B Hansen, Kurt Jensen
The physical demands imposed on national team handball teams during the Olympics imply significant physical preparation in order to improve performance and reduce incidence of injuries. The purpose of the present case report is to describe and analyze the strength and conditioning (S&C) training carried out by the Danish national handball team before the Beijing Olympic Games. Eight weeks of S&C was divided into blocks of 5 weeks emphasizing muscle hypertrophy and long interval running followed by 3 weeks emphasizing strength, power and short interval running...
April 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28301442/effect-of-ankle-mobility-and-segment-ratios-on-trunk-lean-in-the-barbell-back-squat
#2
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
#3
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/28282743/can-changes-in-resistance-exercise-workload-influence-internal-load-countermovement-jump-performance-and-the-endocrine-response
#4
Daniel J Hiscock, Brian Dawson, Michael Clarke, Peter Peeling
This study examined the influence of differing volume load and intensity (%1 repetition maximum[%1RM]) resistance exercise workouts on session rating of perceived exertion (sRPE) countermovement jump (CMJ) performance and endocrine responses. Twelve participants performed a workout comprising four exercises (bench press, back squat, deadlift and prone bench pull) in randomised order as either power (POW); 3 sets × 6 repetitions at 45%1RM × 3 min inter-set rest, strength (ST); 3 sets × 3 repetitions at 90%1RM × 3 min inter-set rest, or hypertrophy (HYP); 3 sets × 10 repetitions at 70%1RM × 1 min inter-set rest in a randomised-crossover design...
February 23, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28240654/lumbar-spine-alignment-in-6-common-postures-a-rom-analysis-with-implications-for-deformity-correction
#5
Hwee Weng Dennis Hey, Eugene Tze-Chun Lau, Kimberly-Anne Tan, Joel Louis Lim, Denise Choong, Leok-Lim Lau, Ka-Po Gabriel Liu, Hee-Kit Wong
STUDY DESIGN: . A prospective cross-sectional study. OBJECTIVE: To compare lumbar spine alignment in 6 common postures, and estimate loss in range of motion (ROM) relative to standing. SUMMARY OF BACKGROUND DATA: Ideal position for fusion of lumbar spine remains unknown. While surgical fusion is necessary for deformity correction and symptom relief, the final position in which the vertebrae are immobilized should provide maximum residual function...
February 24, 2017: Spine
https://www.readbyqxmd.com/read/28195975/the-high-bar-and-low-bar-back-squats-a-biomechanical-analysis
#6
Daniel J Glassbrook, Scott R Brown, Eric R Helms, J Scott Duncan, Adam G Storey
No prior study has compared the joint angle and ground reaction force (Fv) differences between the high-bar back-squat (HBBS) and low-bar back-squat (LBBS) above 90% 1RM. Six male powerlifters (height: 179.2 ± 7.8 cm; bodyweight: 87.1 ± 8.0 kg; age: 27.3 ± 4.2 years) of international level, six male Olympic weightlifters (height: 176.7 ± 7.7 cm; bodyweight: 83.1 ± 13 kg; age: 25.3 ± 3.1 years) of national level, and six recreationally trained male athletes (height: 181.9 ± 8.7 cm; bodyweight: 87.9 ± 15...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28195934/muscle-activation-differs-between-partial-and-full-back-squat-exercise-with-external-load-equated
#7
Josinaldo Jarbas da Silva, Brad Jon Schoenfeld, Priscyla Nardi Marchetti, Silvio Luis Pecoraro, Julia Maria D'Andréa Greve, Paulo Henrique Marchetti
Changes in range of motion affect the magnitude of the load during the squat exercise and, consequently may influence muscle activation. The purpose of this study was to evaluate muscle activation between the partial and full back squat exercise with external load equated on a relative basis between conditions. Fifteen young, healthy, resistance trained men (age: 26±5 years, height: 173±6 cm) performed a back squat at their 10 repetition maximum using two different ranges of motion (partial and full) in a randomized, counterbalanced fashion...
February 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28182500/validity-of-various-methods-for-determining-velocity-force-and-power-in-the-back-squat
#8
Harry G Banyard, Ken Nosaka, Kimitake Sato, G Gregory Haff
PURPOSE: This investigation examined the validity of two kinematic systems for assessing mean velocity (MV), peak velocity (PV), mean force (MF), peak force (PF), mean power (MP), and peak power (PP) during the full depth free-weight back squat performed with maximal concentric effort. METHODS: Ten strength-trained men (26.1±3.0 y; 1.81±0.07 m; 82.0±10.6 kg) performed three 1-repetition maximum (1RM) trials on three separate days, encompassing lifts performed at six relative intensities including 20, 40, 60, 80, 90, and 100% of 1RM...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28174462/activation-of-back-and-lower-limb-muscles-during-squat-exercises-with-different-trunk-flexion
#9
Tae-Sik Lee, Min-Young Song, Yu-Jeong Kwon
[Purpose] The purpose of this study was to investigate the activation of back and lower limb muscles in subjects who were performing a squat exercise at different angles of trunk flexion. [Subjects and Methods] Twenty healthy subjects (age 21.1± 1.8 years, height 168.7 ± 8.2 cm, weight 66.1 ± 12.3 kg) volunteered. The activation of the erector spinae muscle, rectus femoris muscle, gluteus maximus muscle and biceps femoris muscle was observed while the subjects performed squat exercises with a trunk flexion of 0°, 15°, and 30°...
December 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28150180/pelvic-posture-and-kinematics-in-femoroacetabular-impingement-a-systematic-review
#10
REVIEW
Luca Pierannunzii
BACKGROUND: Pelvic posture and kinematics influence acetabular orientation and are therefore expected to be involved in the pathomechanics of femoroacetabular impingement (FAI). This systematic review aims to determine whether FAI patients show pelvic postures or patterns of motion contributing to impingement or, conversely, develop compensatory postures and patterns of motion preventing it. MATERIALS AND METHODS: PubMed/MEDLINE, Embase, Google Scholar and the Cochrane Library were systematically searched to find all the studies that measured pelvic positional and/or kinematic data in humans (patients or cadaveric specimens) affected by FAI...
February 1, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28090144/maximal-power-training-induced-different-improvement-in-throwing-velocity-and-muscle-strength-according-to-playing-positions-in-elite-male-handball-players
#11
M Cherif, H Chtourou, N Souissi, A Aouidet, K Chamari
This study was designed to assess the effect of strength and power training on throwing velocity and muscle strength in handball players according to their playing positions. Twenty-two male handball players were assigned to either an experimental group (n=11) or a control group (n=11) (age: 22.1 ± 3.0 years). They were asked to complete (i) the ball throwing velocity test and (ii) the one-repetition maximum (1-RM) tests for the half-back squat, the pull-over, the bench press, the developed neck, and the print exercises before and after 12 weeks of maximal power training...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28043028/modulation-of-inflammatory-response-arising-from-high-intensity-intermittent-and-concurrent-strength-training-in-physically-active-males
#12
Paula Alves Monteiro, Eduardo Zapaterra Campos, Flaviane Poleto de Oliveira, Fernando Pierin Peres, José Cesar Rosa-Neto, Gustavo Duarte Pimentel, Fabio Santos Lira
The purposes of this study were to determine: (i) the extent of an acute session of high-intensity intermittent exercise (HIIE) followed by a concurrent strength session (Conc) on the increase of systemic inflammatory cytokines and chemokines, and (ii) whether eight weeks of high intensity interval training plus concurrent strength training alters the acute inflammatory response and immune status. Ten recreationally active males (aged 26.9±4.3years) performed two experimental exercise sessions interspersed by eight weeks of HIIT plus concurrent strength training...
December 30, 2016: Cytokine
https://www.readbyqxmd.com/read/28031512/z-plasty-for-severe-gluteal-muscle-contracture-in-children
#13
Kun Zha, GuoHui Liu, Shuhua Yang, Faqi Cao
PURPOSE: To review the records of 363 patients with severe gluteal muscle contracture to determine its mechanism, underlying pathology, and treatment outcome. METHODS: Records of 136 males and 227 females aged 5 to 18 (mean, 12.2) years who underwent Z-plasty for bilateral (n=347) or unilateral (n=16) severe gluteal muscle contracture were reviewed. Severe gluteal muscle contracture was classified as typical (n=52) or special (n=311). The typical type is associated with symptoms of positive out-toe gait, Ober sign, back-extending test, cross-leg test, squatting with knee side-by-side test, and hip dysfunction...
2016: Journal of Orthopaedic Surgery
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
#14
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/27893479/complex-training-the-effect-of-exercise-selection-and-training-status-on-post-activation-potentiation-in-rugby-league-players
#15
David J Scott, Massimiliano Ditroilo, Phil Marshall
This study compared the post-activation potentiation (PAP) response of the hex bar deadlift (HBD) and back squat (BS) exercises. The PAP response between different levels of athletes was also compared. Ten professional and ten amateur rugby league players performed two experimental sessions. Participants performed a countermovement jump (CMJ) before and 2, 4, 6, 8, 10, 12, 14 and 16 minutes after a conditioning activity (CA) that contained 1 set of 3 repetitions at 93% 1RM of either HBD or BS. A force platform determined peak power output (PPO), force at PPO, velocity at PPO and jump height of each CMJ...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27870698/risk-factors-for-injury-among-japanese-collegiate-players-of-american-football-based-on-performance-test-results
#16
Junta Iguchi, Yuya Watanabe, Misaka Kimura, Yoshihiko Fujisawa, Tatsuya Hojo, Yasuhiro Yuasa, Shinsuke Higashi, Kenji Kuzuhara
Iguchi, J, Watanabe, Y, Kimura, M, Fujisawa, Y, Hojo, T, Yuasa, Y, Higashi, S, and Kuzuhara, K. Risk factors for injury among Japanese collegiate players of American football based on performance test results. J Strength Cond Res 30(12): 3405-3411, 2016-The purpose of this study was to identify how risk factors for injury during American football are related to players' physical strength as determined using typical performance tests. One hundred 53 Japanese collegiate players of American football were recruited for this study...
December 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27870696/strength-and-conditioning-and-concurrent-training-practices-in-elite-rugby-union
#17
Thomas W Jones, Andrew Smith, Lindsay S Macnaughton, Duncan N French
Jones, TW, Smith, A, Macnaughton, LS, and French, DN. Strength and Conditioning and Concurrent Training Practices in Elite Rugby Union. J Strength Cond Res 30(12): 3354-3366, 2016-There is limited published research on strength and conditioning (S&C) practices in elite rugby union (RU). Information regarding testing batteries and programme design would provide valuable information to both applied practitioners and researchers investigating the influence of training interventions or preperformance strategies...
December 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27813392/physical-and-physiological-differences-of-backs-and-forwards-from-the-brazilian-national-rugby-union-team
#18
Fábio Y Nakamura, Lucas A Pereira, José E Moraes, Ronaldo Kobal, Katia Kitamura, Cesar C Cal Abad, Luís M Teixeira Vaz, Irineu Loturco
BACKGROUND: The aim of this study was to compare backs and forwards rugby union players recruited to a National team in the following physical and physiological indicators: anthropometrics, squat jump (SJ), countermovement jump (CMJ), 10- and 30-m sprint, resting heart rate variability (HRV), Yo-Yo test and heart rate (HR) at 2-min of test. METHODS: The measurements were performed on the first day of a training camp planned to finely select the players who would participate in the 2016 America's Rugby Championship...
November 4, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27803618/effect-of-3-different-applications-of-kinesio-taping-denko%C3%A2-on-electromyographic-activity-inhibition-or-facilitation-of-the-quadriceps-of-males-during-squat-exercise
#19
Júlio C Serrão, Bruno Mezêncio, João G Claudino, Rafael Soncin, Pedro L Sampaio Miyashiro, Eric P Sousa, Eduardo Borges, Vinícius Zanetti, Igor Phillip, Luiz Mochizuki, Alberto C Amadio
Kinesio taping consists of a technique which uses the application of an elastic adhesive tape. It has become a widely used rehabilitation modality for the prevention and treatment of musculoskeletal disorders. The objective of this study was to verify the effect of the application of Kinesio Taping Denko(®) in three conditions (facilitation, inhibition, and placebo) on the electromyographic activity of the quadriceps and hamstrings muscles on facilitating or inhibiting the muscle function and on the perceived exertion during the barbell back squat exercise in healthy male subjects...
September 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27770687/the-effects-of-squatting-footwear-on-three-dimensional-lower-limb-and-spine-kinetics
#20
Daniel J Southwell, Shane A Petersen, Tyson A C Beach, Ryan B Graham
Altering footwear worn during performance of the barbell back squat has been shown to change motion patterns, but it is not completely understood how this affects biomechanical loading demands. The primary objective was to compare lower back and extremity net joint moments in 24 experienced weightlifters (12M, 12F) who performed 80% one-repetition maximum back squats under three different footwear conditions (barefoot, running shoes, weightlifting shoes). Results showed that there was a significant main effect of footwear condition on the knee extension moment (p=0...
December 2016: Journal of Electromyography and Kinesiology
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