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https://www.readbyqxmd.com/read/29315164/effects-of-strength-training-on-postpubertal-adolescent-distance-runners
#1
Richard C Blagrove, Louis P Howe, Emily J Cushion, Adam Spence, Glyn Howatson, Charles R Pedlar, Philip R Hayes
PURPOSE: Strength training activities have consistently been shown to improve running economy (RE) and neuromuscular characteristics, such as force producing ability and maximal speed, in adult distance runners. However the effects on adolescent (<18 years) runners remains elusive. This randomized control trial aimed to examine the effect of strength training on several important physiological and neuromuscular qualities associated with distance running performance. METHODS: Participants (n=25, 13 female, 17...
January 8, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29314903/national-athletic-trainers-association-position-statement-prevention-of-anterior-cruciate-ligament-injury
#2
Darin A Padua, Lindsay J DiStefano, Timothy E Hewett, William E Garrett, Stephen W Marshall, Grace M Golden, Sandra J Shultz, Susan M Sigward
OBJECTIVE:   To provide certified athletic trainers, physicians, and other health care and fitness professionals with recommendations based on current evidence regarding the prevention of noncontact and indirect-contact anterior cruciate ligament (ACL) injuries in athletes and physically active individuals. BACKGROUND:   Preventing ACL injuries during sport and physical activity may dramatically decrease medical costs and long-term disability. Implementing ACL injury-prevention training programs may improve an individual's neuromuscular control and lower extremity biomechanics and thereby reduce the risk of injury...
January 9, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29281133/the-impact-of-strength-level-on-adaptations-to-combined-weightlifting-plyometric-and-ballistic-training
#3
Lachlan P James, G Gregory Haff, Vincent G Kelly, Mark Connick, Ben Hoffman, Emma M Beckman
The purpose of this investigation was to determine if the magnitude of adaptation to integrated ballistic training is influenced by initial strength level. Such information is needed to inform resistance training guidelines for both higher- and lower-level athlete populations. To this end, two groups of distinctly different strength levels (stronger: one-repetition-maximum (1RM) squat = 2.01 ± 0.15 kg. BM-1 ; weaker: 1.20 ± 0.20 kg. BM-1 ) completed 10 weeks of resistance training incorporating weightlifting derivatives, plyometric actions and ballistic exercises...
December 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29276539/triceps-tendon-rupture-repair-and-rehabilitation
#4
Cezary Kocialkowski, Rebecca Carter, Chris Peach
Triceps tendon ruptures are rare injuries and are frequently missed on initial presentation to the emergency department. In cases of complete rupture, surgical repair is recommended but no guidelines exist on the optimum reconstructive technique or rehabilitation. We present a surgical technique and rehabilitation programme for the management of these injuries. A midline posterior incision is performed, the ruptured triceps tendon is identified and mobilized, and the tendon footprint is prepared. The tendon is then repaired using bone suture anchors, with a parachute technique, and held in 40° of flexion...
January 2018: Shoulder & Elbow
https://www.readbyqxmd.com/read/29260403/bilateral-deficit-of-spring-like-behaviour-during-hopping-in-sprinters
#5
Mitsuo Otsuka, Toshiyuki Kurihara, Tadao Isaka
PURPOSE: Unilateral leg stiffness is a key contributor to sprint running speed, thereby great bilateral deficit (BLD) of leg stiffness would be expected to be observed in sprinters. However, it remains clear only BLD of leg stiffness at the preferred hopping frequency in non-sprinters. The purpose of this study was to clarify the BLD of spring-like behaviour in hopping at various frequencies and the effect of chronic adaptation via sprint running experience on BLD during the hopping. METHODS: Fifteen male experienced sprinters and 12 male novices participated in this study...
December 20, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29249987/imbalances-in-the-development-of-muscle-and-tendon-as-risk-factor-for-tendinopathies-in-youth-athletes-a-review-of-current-evidence-and-concepts-of-prevention
#6
REVIEW
Falk Mersmann, Sebastian Bohm, Adamantios Arampatzis
Tendons feature the crucial role to transmit the forces exerted by the muscles to the skeleton. Thus, an increase of the force generating capacity of a muscle needs to go in line with a corresponding modulation of the mechanical properties of the associated tendon to avoid potential harm to the integrity of the tendinous tissue. However, as summarized in the present narrative review, muscle and tendon differ with regard to both the time course of adaptation to mechanical loading as well as the responsiveness to certain types of mechanical stimulation...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29249083/effects-of-strength-training-on-the-physiological-determinants-of-middle-and-long-distance-running-performance-a-systematic-review
#7
REVIEW
Richard C Blagrove, Glyn Howatson, Philip R Hayes
BACKGROUND: Middle- and long-distance running performance is constrained by several important aerobic and anaerobic parameters. The efficacy of strength training (ST) for distance runners has received considerable attention in the literature. However, to date, the results of these studies have not been fully synthesized in a review on the topic. OBJECTIVES: This systematic review aimed to provide a comprehensive critical commentary on the current literature that has examined the effects of ST modalities on the physiological determinants and performance of middle- and long-distance runners, and offer recommendations for best practice...
December 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29239779/gender-differences-in-residual-effect-of-prior-drop-jumps-on-oxygen-uptake-during-heavy-cycling-exercise
#8
Neringa Baranauskienė, Sandra Kilikevičienė, Loreta Stasiulė, Genuvaitė Civinskienė, Arvydas Stasiulis
BACKGROUND AND OBJECTIVE: Unaccustomed eccentric or eccentric-concentric exercise leaves us stiff and sore the next day and can cause muscle damage. The data about the residual effect of prior eccentric-concentric exercises on oxygen uptake (VO2) during constant cycling exercise in women or the data about differences of such effect between genders are scarce. Therefore, the aim of this study was to assess differences of the residual effect of PDJ on VO2 during HCE and indirect muscle damage parameters between women and men...
November 1, 2017: Medicina
https://www.readbyqxmd.com/read/29238253/plyometric-training-improves-sprinting-jumping-and-throwing-capacities-of-high-level-female-volleyball-players-better-than-skill-based-conditioning
#9
Bahri Gjinovci, Kemal Idrizovic, Ognjen Uljevic, Damir Sekulic
There is an evident lack of studies on the effectiveness of plyometric- and skill-based-conditioning in volleyball. This study aimed to evaluate effects of 12-week plyometric- and volleyball-skill-based training on specific conditioning abilities in female volleyball players. The sample included 41 high-level female volleyball players (21.8 ± 2.1 years of age; 1.76 ± 0.06 cm; 60.8 ± 7.0 kg), who participated in plyometric- (n = 21), or skill-based-conditioning-program (n = 20). Both programs were performed twice per week...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29227735/effect-of-8-weeks-of-concurrent-plyometric-and-running-training-on-spatiotemporal-and-physiological-variables-of-novice-runners
#10
Josué Gómez-Molina, Ana Ogueta-Alday, Jesus Camara, Christopher Stickley, Juan García-López
Concurrent plyometric and running training has the potential to improve running economy (RE) and performance through increasing muscle strength and power, but the possible effect on spatiotemporal parameters of running has not been studied yet. The aim of this study was to compare the effect of 8 weeks of concurrent plyometric and running training on spatiotemporal parameters and physiological variables of novice runners. Twenty-five male participants were randomly assigned into two training groups; running group (RG) (n = 11) and running + plyometric group (RPG) (n = 14)...
December 11, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29220384/rope-skipping-increases-bone-mineral-density-at-calcanei-of-pubertal-girls-in-hong-kong-a-quasi-experimental-investigation
#11
Amy S Ha, Johan Y Y Ng
Bone mineral accrual during puberty is important, especially in girls, because it is related to reduced risks of osteoporosis in adulthood. Previous research has shown that jumping or plyometric exercises may be effective in increasing bone mineral density in adolescents. Rope skipping is a form of activity that involves jumping, thus regular skipping may also increase bone mineral density in pubertal girls. To this end, we conducted a quasi-experimental to examine the effects of rope skipping on girls' bone mineral density and cardiovascular fitness...
2017: PloS One
https://www.readbyqxmd.com/read/29214194/data-concerning-the-effect-of-plyometric-training-on-jump-performance-in-soccer-players-a-meta-analysis
#12
Maamer Slimani, Armin Paravlić, Nicola Luigi Bragazzi
Plyometric training (PT) enhances soccer performance, particularly vertical jump. However, the effectiveness of PT depends on various factors. A systematic search of the research literature was conducted for randomized controlled trials (RCTs) studying the effects of PT on countermovement jump (CMJ) height in soccer players. Ten studies were obtained through manual and electronic journal searches (up to April 2017). Significant differences were observed when compared: (1) PT group vs. control group (ES=0.85; 95% CI 0...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29206782/muscle-fiber-and-performance-changes-after-fast-eccentric-complex-training
#13
Gregory C Bogdanis, Athanasios Tsoukos, Lee E Brown, Elisavet Selima, Panagiotis Veligekas, Konstantinos Spengos, Gerasimos Terzis
INTRODUCTION: The purpose of this study was to examine the effects of a short-term fast eccentric and ballistic complex training program on muscle power, rate of force development (RFD), muscle fiber composition and cross-sectional area (CSA). METHODS: Sixteen male physical education students were randomly assigned to either a training group (TG, n=8) or a control group (C, n=8). The TG followed a 6-week low volume training program, including fast eccentric squat training with an individually optimized load of 74±7% of maximal half-squat strength (1RM) twice per week and a ballistic training session with loaded (30% 1RM) and unloaded jump squats, once per week, all combined with unloaded plyometric jumps...
December 2, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29176387/effects-of-plyometric-and-directional-training-on-speed-and-jump-performance-in-elite-youth-soccer-players
#14
Marco Beato, Mattia Bianchi, Giuseppe Coratella, Michele Merlini, Barry Drust
Soccer players perform approximately 1350 activities (every 4-6 s), such as accelerations/decelerations, and changes of direction (COD) during matches. It is well established that COD and plyometric training have a positive impact on fitness parameters in football players. This study analyzed the effect of a complex COD and plyometric protocol (CODJ-G) compared to an isolated COD protocol (COD-G) training on elite football players.A randomized pre-post parallel group trial was used in this study. Twenty-one youth players were enrolled in this study (mean ± SDs; age 17 ± 0...
November 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29174999/effect-of-upper-body-plyometric-training-on-physical-performance-in-healthy-individuals-a-systematic-review
#15
REVIEW
Deepika Singla, M Ejaz Hussain, Jamal Ali Moiz
OBJECTIVE: To determine the impact of upper body plyometric training (UBPT) on physical performance parameters such as strength, ball throwing speed, ball throw distance and power in healthy individuals. METHODS: PubMed, Scopus, ResearchGate and ERIC databases were searched up to August 2017. Selection of articles was done if they described the outcomes of an upper body plyometric exercise intervention; included measures of strength, ball throwing speed, ball throw distance, or power; included healthy individuals; used a randomized control trial; and had full text available in English language...
November 11, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29170708/repeated-plyometric-exercise-attenuates-blood-glucose-in-healthy-adults
#16
Saldiam R Barillas, Casey M Watkins, Megan A Wong, Ian J Dobbs, David C Archer, Cameron N Munger, Andrew J Galpin, Jared W Coburn, Lee E Brown
Plyometric exercise is popular in commercial exercise programs aiming to maximize energy expenditure for weight loss. However, the effect of plyometric exercise on blood glucose is unknown. The purpose of this study was to investigate the effect of relatively high intensity plyometric exercise on blood glucose. Thirteen subjects (6 females age= 21.8 ± 1.0 yrs.; height= 163.7 ± 7.8 cm; mass= 60.8 ± 6.7 kg and 7 males age= 22.0 ± 2.6 yrs.; height= 182.3 ± 3.6 cm; mass= 87.4 ± 12.5 kg) volunteered to participate...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29150270/m-biceps-femoris-a-wolf-in-sheep-s-clothing-the-downside-of-a-lower-limb-injury-prevention-training
#17
Thomas Ertelt, Thomas Gronwald
Both, hamstring and ACL injuries are among the most typical injuries, particularly in change of direction and high speed running sports. They're also difficult to treat. Therefore, in the past few years, sports medicine practitioners and exercise scientists have mainly been focusing on the development and implementation of preventive programs in order to reduce the number of lower limb injuries, mainly by improving knee alignment. A number of studies have been able to prove the success of these training interventions, which are mainly addressing sensorimotor abilities and plyometric activities...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29140909/the-effects-of-load-on-peak-power-output-fatigue-during-the-bench-throw
#18
David Boffey, Bulent Sokmen, Kurt Sollanek, Wanda Boda, Steven Winter
The ability to create power is an important variable for athletic success. No study to date has compared peak power output (PPO) fatigue across multiple sets and with different loads with the bench throw. This study aimed to begin the process of establishing empirical upper body power training guidelines for moderately strong athletes by determining how load (30%, 45%, 60% 1RM) affects PPO (Watts) dropoff during 3 sets of 10 repetitions of the bench throw. 10 resistance-trained male volunteers ((mean ± SD): age 20...
November 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29121680/effects-of-drop-height-and-surface-instability-on-jump-performance-and-knee-kinematics
#19
Melanie Lesinski, Olaf Prieske, Rainer Beurskens, David Behm, Urs Granacher
The purpose of this study was to examine the combined effects of drop-height and surface condition on drop jump (DJ) performance and knee joint kinematics. DJ performance, sagittal and frontal plane knee joint kinematics were measured in jump experienced young male and female adults during DJs on stable, unstable and highly unstable surfaces using different drop-heights (20, 40, 60 cm). Findings revealed impaired DJ performance (Δ5-16%; p<0.05; 1.43≤d≤2.82), reduced knee valgus motion (Δ33-52%; p<0...
November 9, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29112054/lower-extremity-stiffness-considerations-for-testing-performance-enhancement-and-injury-risk
#20
Jon Brazier, Sean Maloney, Chris Bishop, Paul J Read, Anthony N Turner
Brazier, J, Maloney, S, Bishop, C, Read, PJ, and Turner, AN. Lower extremity stiffness: considerations for testing, performance enhancement, and injury risk. J Strength Cond Res XX(X): 000-000, 2017-Force-deformation characteristics of the lower limb have been associated with athletic performance and may modulate the risk of injury. Despite these known associations, measurements of lower extremity stiffness are not commonly administered by strength and conditioning coaches. This review provides an overview of the available literature pertaining to the effects of lower extremity stiffness on physical performance and injury risk...
November 1, 2017: Journal of Strength and Conditioning Research
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