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https://www.readbyqxmd.com/read/29927885/sex-differences-in-physical-capacities-of-german-bundesliga-soccer-players
#1
Maithe Cardoso de Araújo, Christian Baumgart, Christian T Jansen, Jürgen Freiwald, Matthias W Hoppe
Cardoso de Araújo, M, Baumgart, C, Jansen, CT, Freiwald, J, and Hoppe, MW. Sex differences in physical capacities of German Bundesliga soccer players. J Strength Cond Res XX(X): 000-000, 2018-Sex differences in physical capacities of elite soccer players have received limited attention. Therefore, this study investigated sex differences in linear and nonlinear sprint, squat and countermovement jump, core endurance, as well as incremental and intermittent endurance capacities in German Bundesliga soccer players...
June 20, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29912081/combined-effects-of-self-myofascial-release-and-dynamic-stretching-on-range-of-motion-jump-sprint-and-agility-performance
#2
Erick D Richman, Brian M Tyo, Clayton R Nicks
Richman, ED, Tyo, BM, and Nicks, CR. Combined effects of self-myofascial release and dynamic stretching on range of motion, jump, sprint, and agility performance. J Strength Cond Res XX(X): 000-000, 2018-Massage has been used as both a pre- and post-exercise modality with purported benefits to flexibility and athletic performance. This study was designed to determine the effect of a 6-minute protocol of self massage known as self-myofascial release (SMR) using a foam rolling device in conjunction with a general warm-up and sport-specific dynamic stretching (DS) session on flexibility and explosive athletic performance in a sample of 14 female collegiate athletes...
June 14, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29910428/relationships-between-isometric-force-time-characteristics-and-dynamic-performance
#3
Thomas Dos'Santos, Christopher Thomas, Paul Comfort, John J McMahon, Paul A Jones
The purpose of this study was to explore the relationships between isometric mid-thigh pull (IMTP) force-time characteristics (peak force and time-specific force vales (100⁻250 ms)) and dynamic performance and compare dynamic performance between stronger and weaker athletes. Forty-three athletes from different sports (rowing, soccer, bicycle motocross, and hockey) performed three trials of the squat jump (SJ), countermovement jump (CMJ), and IMTP, and performed a one repetition maximum power clean (PC). Reactive strength index modified (RSImod) was also calculated from the CMJ...
September 13, 2017: Sports
https://www.readbyqxmd.com/read/29910426/the-relationships-between-hip-and-knee-extensor-cross-sectional-area-strength-power-and-potentiation-characteristics
#4
Timothy J Suchomel, Michael H Stone
The purpose of this study was to examine the relationships between muscle cross-sectional area (CSA), maximal strength, power output, and maximum potentiation characteristics. The vastus lateralis and biceps femoris CSA, one repetition maximum (1RM) back squat, 1RM concentric-only half-squat (COHS) strength, static jump power output, and maximum potentiation characteristics of 17 resistance-trained men was assessed during several testing sessions. Pearson's correlation coefficients were used to examine the relationships between CSA, strength, power output, and maximum potentiation measures...
September 5, 2017: Sports
https://www.readbyqxmd.com/read/29910350/identifying-a-test-to-monitor-weightlifting-performance-in-competitive-male-and-female-weightlifters
#5
S Kyle Travis, Jacob R Goodin, George K Beckham, Caleb D Bazyler
Monitoring tests are commonly used to assess weightlifter’s preparedness for competition. Although various monitoring tests have been used, it is not clear which test is the strongest indicator of weightlifting performance. Therefore, the purpose of this study was to (1) determine the relationships between vertical jump, isometric mid-thigh pull (IMTP) and weightlifting performance; and (2) compare vertical jumps to IMTP as monitoring tests of weightlifting performance in a large cohort of male and female weightlifters...
May 23, 2018: Sports
https://www.readbyqxmd.com/read/29908345/functional-and-physiological-adaptations-following-concurrent-training-using-sets-with-and-without-concentric-failure-in-elderly-men-a-randomized-clinical-trial
#6
Eduardo Lusa Cadore, Erik Menger, Juliana Lopes Teodoro, Larissa Xavier Neves da Silva, Francesco Pinto Boeno, Daniel Umpierre, Cíntia Ehlers Botton, Rodrigo Ferrari, Giovani Dos Santos Cunha, Mikel Izquierdo, Ronei Silveira Pinto
This study compared the functional and physiological adaptations induced by concurrent training (CT) performed with repetitions to concentric failure and not to failure in elderly men. Fifty-two individuals (66.2 ± 5.2 years) completed the pre- and post-measurements and were divided into three groups: repetitions to failure (RFG, n = 17); repetitions not to failure (NFG, n = 20); and repetitions not to failure with total volume equalized to that in the RFG (ENFG, n = 15). The participants' sit-to-stand ability, timed-up-and-go (TUG), muscle power output in squat jump (SJ) and countermovement jump (CMJ), peak oxygen uptake (VO2peak ), blood lipids and glucose, as well as blood pressure levels were assessed...
June 13, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29906737/achilles-tendon-loading-during-weight-bearing-exercises
#7
Naghmeh Gheidi, Thomas W Kernozek, John D Willson, Andrew Revak, Keith Diers
OBJECTIVE: Compare the estimated Achilles tendon (AT) loading using a musculoskeletal model during commonly performed weight bearing therapeutic exercises. DESIGN: Controlled laboratory study. SETTING: University biomechanics laboratory. PARTICIPANTS: Eighteen healthy males (Age:22.1 ± 1.8 years, height:177.7 ± 8.4 cm, weight = 74.29 ± 11.3 kg). MAIN OUTCOME MEASURE(S): AT loading was estimated during eleven exercises: tandem, Romberg, and unilateral standing, unilateral and bilateral heel raising, unilateral and bilateral jump landing, squat, lunge, walking, and running...
May 10, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29896116/plyometrics-can-preserve-peak-power-during-2-months-of-physical-inactivity-an-rct-including-a-one-year-follow-up
#8
Andreas Kramer, Jakob Kümmel, Albert Gollhofer, Gabriele Armbrecht, Ramona Ritzmann, Daniel Belavy, Dieter Felsenberg, Markus Gruber
Objective: Inactivity results in a marked loss of muscle function, especially in movements requiring high power, force, and rate of force development. The aim of the present study was to evaluate if jump training can prevent these deteriorating effects of physical inactivity. Methods: Performance and muscle activity during several types of jumps was assessed directly before and after 60 days of bed rest as well as during follow-up visits in 23 male participants. Participants in the jump training group (JUMP, 12 participants) trained 5-6x per week during the bed rest period in a sledge jump system that allows jumps in a horizontal position, whereas the control group (CTRL, 11 participants) did not train...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29896023/comparison-of-outcome-after-acl-reconstruction-in-terms-of-subjective-assessment-of-symptoms-and-function-and-clinical-assessment-of-ligament-stability
#9
Abhinav Bhardwaj, Narender Singh Solanki, Hemant Jain, Kishore Raichandani, Surbhi Raichandani, Vistasp Daruwalla
Background: The knee joint is frequently involved in sports and other injuries with Anterior cruciate ligament being a very common ligament to be injured. The Lachman test, pivot-shift test, and instrumented knee laxity examination are frequently used and reported for evaluation of ACL reconstruction. The aim of this study is to examine and evaluate the relationships between the clinical assessment of ligament stability and subjective assessment of symptoms and function after ACL reconstruction...
April 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29878983/association-of-compartmental-leg-lean-mass-measured-by-dual-x-ray-absorptiometry-with-force-production
#10
Christiana J Raymond-Pope, Donald R Dengel, John S Fitzgerald, Tyler A Bosch
Raymond-Pope, CJ, Dengel, DR, Fitzgerald, JS, and Bosch, TA. Association of compartmental leg lean mass measured by dual X-ray absorptiometry with force production. J Strength Cond Res XX(X): 000-000, 2018-We recently reported a novel method for measuring upper leg anterior/posterior compartmental composition. The purpose of this study was to determine the association of this method with measures of muscle-specific and explosive strength and to compare this method with traditional dual energy X-ray absorptiometry (DXA) measurements of total and upper leg masses...
June 6, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29867552/importance-of-reactive-agility-and-change-of-direction-speed-in-differentiating-performance-levels-in-junior-soccer-players-reliability-and-validity-of-newly-developed-soccer-specific-tests
#11
Haris Pojskic, Erik Åslin, Ante Krolo, Ivan Jukic, Ognjen Uljevic, Miodrag Spasic, Damir Sekulic
Agility is a significant determinant of success in soccer; however, studies have rarely presented and evaluated soccer-specific tests of reactive agility (S_RAG) and non-reactive agility (change of direction speed - S_CODS) or their applicability in this sport. The aim of this study was to define the reliability and validity of newly developed tests of the S_RAG and S_CODS to discriminate between the performance levels of junior soccer players. The study consisted of 20 players who were involved at the highest national competitive rank (all males; age: 17...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29863591/individual-and-combined-effect-of-inter-repetition-rest-and-elastic-bands-on-jumping-potentiation-in-resistance-trained-men
#12
Brett S Nickerson, Tyler D Williams, Ronald L Snarr, Kyung-Shin Park
Nickerson, BS, Williams, TD, Snarr, RL, and Park, K-S. Individual and combined effect of inter-repetition rest and elastic bands on jumping potentiation in resistance-trained men. J Strength Cond Res XX(X): 000-000, 2018-The purpose of this study was to determine the individual and combined effects of cluster sets (CS) and elastic bands for jumping potentiation in resistance-trained men. Twelve resistance-trained men (age: 22 ± 3 years) participated in this study. In a random order, participants completed 1 set of 3 repetitions at 85% 1-repetition maximum for the parallel back squat: (a) traditional set with continuous repetitions; (b) continuous repetitions with elastic bands (BANDS); (c) CS with 30 seconds of rest between each repetition (CS30); and (d) CS with 30 seconds of rest between each repetition and elastic bands (CS + BANDS)...
May 30, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29863590/influence-of-maximal-strength-on-in-water-and-dry-land-performance-in-young-water-polo-players
#13
Michael Keiner, Holger Rähse, Klaus Wirth, Hagen Hartmann, Katharina Fries, G Gregory Haff
Keiner, M, Rähse, H, Wirth, K, Hartmann, H, Fries, K, and Haff, GG. Influence of maximal strength on in-water and dry-land performance in young water polo players. J Strength Cond Res XX(X): 000-000, 2018-Water polo is a multifaceted sport that is characterized by explosive actions, including sprint swimming, jumping, throwing, and struggling against opponents. Based on these factors, maximal and speed strength may be important characteristics to develop in-water polo players. However, more research is needed to further understand the relationship between various strength characteristics and water polo performance...
May 30, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29851551/validity-and-reliability-of-a-linear-positional-transducer-across-commonly-practised-resistance-training-exercises
#14
Harry F Dorrell, Joseph M Moore, Mark F Smith, Thomas I Gee
This study investigated the validity and reliability of the GymAware PowerTool (GPT). Thirteen resistance trained participants completed three visits, consisting of three repetitions of free-weight back squat, bench press, deadlift (80% one repetition maximum), and countermovement jump. Bar displacement, peak and mean velocity, peak and mean force, and jump height were calculated using the GPT, a three-dimensional motion capture system (Motion Analysis Corporation; 150 Hz), and a force plate (Kistler; 1500 Hz)...
May 31, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29846142/effect-of-different-inter-repetition-rest-intervals-across-four-load-intensities-on-velocity-loss-and-blood-lactate-concentration-during-full-squat-exercise
#15
Ricardo Mora-Custodio, David Rodríguez-Rosell, Juan Manuel Yáñez-García, Miguel Sánchez-Moreno, Fernando Pareja-Blanco, Juan José González-Badillo
This study aimed to analyze the acute effect of inter-repetition rest (IRR) intervals on mechanical and metabolic response during four resistance exercise protocols (REPs). Thirty resistance-trained men were randomly assigned to: continuous repetitions (CR), 10 s (IRR10) or 20 s (IRR20) inter-repetition rest. The REPs consisted of 3 sets of 6, 5, 4 and 3 repetitions against 60, 70, 75 and 80% 1RM, respectively, in the full squat exercise. Muscle fatigue was assessed using: percentage of velocity loss over three sets, percentage of velocity loss against the ~1 m·s-1 load (V1 m·s-1 ), and loss of countermovement jump (CMJ) height pre-post exercise...
May 30, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29809068/1rm-measures-or-maximum-bar-power-output-which-is-more-related-to-sport-performance
#16
Irineu Loturco, Timothy Suchomel, Chris Bishop, Ronaldo Kobal, Lucas A Pereira, Michael McGuigan
PURPOSE: This study compared the associations between optimum power loads and 1-repetition maximum (1RM) values (assessed in half-squat [HS] and jump squat [JS] exercises) and multiple performance measures in elite athletes. METHODS: Sixty-one elite athletes (fifteen Olympians) from four different sports (track and field [sprinters and jumpers], rugby sevens, bobsled, and soccer) performed squat and countermovement jumps, HS exercise (for assessing 1RM), HS and JS exercises (for assessing bar-power output), and sprint tests (60-m for sprinters and jumpers and 40-m for the other athletes)...
May 29, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29809061/divergent-performance-outcomes-following-resistance-training-using-repetition-maximums-or-relative-intensity
#17
Kevin M Carroll, Jake R Bernards, Caleb D Bazyler, Christopher B Taber, Charles A Stuart, Brad H DeWeese, Kimitake Sato, Michael H Stone
PURPOSE: The purpose of our investigation was to compare repetition maximum (RM) to relative intensity using sets and repetitions (RISR) resistance training (RT) on measures of training load, vertical jump, and force production in well-trained lifters. METHODS: Fifteen well-trained (isometric peak force= 4403.61+664.69 N, mean+SD) males underwent RT 3 d·wk-1 for 10-weeks in either an RM group (n=8) or RISR group (n=7). Weeks 8-10 consisted of a tapering period for both groups...
May 29, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29809056/effects-of-athlete-dependent-traits-on-joint-and-system-countermovement-jump-power
#18
Kym J Williams, Dale W Chapman, Elissa J Phillips, Nick Ball
PURPOSE: To establish the influence of athlete-dependent characteristics on the generation and timing of system and individual joint powers during a countermovement jump (CMJ). METHODS: Male national representative athletes from Volleyball ([VB] n=7), Basketball ([BB], n=6) and Rugby Union ([RU] n=7) performed a set of three CMJ's at relative barbell loads of 0, 10, 20, 30, and 40% of absolute back squat strength. Ground reaction forces and joint kinematics were captured using a 16 camera motion capture system integrated with two in-ground force plates...
May 29, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29797592/scheduling-of-eccentric-lower-limb-injury-prevention-exercises-during-the-soccer-micro-cycle-which-day-of-the-week
#19
Ric Lovell, Matthew Whalan, Paul Wm Marshall, John A Sampson, Jason C Siegler, Martin Buchheit
Scheduling eccentric-based injury prevention programs (IPP) during the common 6-day micro-cycle in Soccer is challenged by recovery and tapering phases. This study profiled muscle damage, neuromuscular performance, and perceptual responses to a lower-limb eccentric-based IPP administered 1 (MD+1) versus 3 days (MD+3) post-match. 18 semi-professional players were monitored daily during 3 in-season 6-day micro-cycles, including weekly competitive fixtures. Capillary creatine kinase concentration (CK), posterior lower limb isometric peak force (PF), counter-movement jump (CMJ) performance, and muscle soreness were assessed 24 h prior to match-day (baseline), and every 24 h up to 120 h post-match...
May 24, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29795746/global-active-stretching-sga%C3%A2-practice-for-judo-practitioners-physical-performance-enhancement
#20
Heleno Almeida, Raphael F DE Souza, Felipe J Aidar, Alisson G DA Silva, Ricardo P Regi, Afrânio A Bastos
In order to analyze the Global Active Stretching (SGA®) practice on the physical performance enhancement in judo-practitioner competitors, 12 male athletes from Judo Federation of Sergipe (Federação Sergipana de Judô), were divided into two groups: Experimental Group (EG) and Control Group (CG). For 10 weeks, the EG practiced SGA® self-postures and the CG practiced assorted calisthenic exercises. All of them were submitted to a variety of tests (before and after): handgrip strength, flexibility, upper limbs' muscle power, isometric pull-up force, lower limbs' muscle power (squat-jump - SJ and countermovement jump - CMJ) and Tokui Waza test...
2018: International Journal of Exercise Science
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