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https://www.readbyqxmd.com/read/29916182/a-novel-approach-to-enhance-acl-injury-prevention-programs
#1
EDITORIAL
Alli Gokeler, Romain Seil, Gino Kerkhoffs, Evert Verhagen
Efficacy studies have demonstrated decreased anterior cruciate ligament (ACL) injury rates for athletes participating in injury prevention programs. Typically, ACL injury prevention programs entail a combination of plyometrics, strength training, agility and balance exercises. Unfortunately, improvements of movement patterns are not sustained over time. The reason may be related to the type of instructions given during training. Encouraging athletes to consciously control knee movements during exercises may not be optimal for the acquisition of complex motor skills as needed in complex sports environments...
June 18, 2018: Journal of Experimental Orthopaedics
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
#2
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/29869890/high-rate-of-return-to-high-intensity-interval-training-after-arthroscopic-management-of-femoroacetabular-impingement-syndrome
#3
Andrew J Riff, Gift Ukwuani, Ian Clapp, Kamran Movassaghi, D Michael Kelly, Shane J Nho
BACKGROUND: Since the inception of CrossFit in 2000, the popularity of high-intensity interval training (HIIT) in the United States has risen dramatically. While HIIT is a highly efficient exercise for weight loss and improved conditioning, some literature reports injuries in up to 34% of HIIT participants. We sought to evaluate the functional and sports-specific results of hip arthroscopic surgery in recreational HIIT participants. PURPOSE: To evaluate patients' ability to return to HIIT after hip arthroscopic surgery for femoroacetabular impingement syndrome (FAIS)...
June 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29845770/circulating-sclerostin-is-not-suppressed-following-a-single-bout-of-exercise-in-young-men
#4
Katelyn I Guerriere, Julie M Hughes, Erin Gaffney-Stomberg, Jeffery S Staab, Ronald W Matheny
The aim of this study was to determine whether an acute bout of exercise reduces serum sclerostin under diet-controlled conditions that stabilize the parathyroid hormone (PTH)-1,alpha-hydroxylase axis. Fourteen male volunteers (age, 22.1 years ± 4.05; BMI, 27.3 kg/m2  ± 3.8) completed a randomized crossover study in which they performed 10 sets of 10 repetitions of plyometric jumps at 40% of their estimated one-repetition maximum leg press or a nonexercise control period. A calcium-controlled diet (1000 mg/day) was implemented prior to, and throughout each study period...
May 2018: Physiological Reports
https://www.readbyqxmd.com/read/29695970/sport-specific-assessment-of-the-effectiveness-of-neuromuscular-training-in-young-athletes
#5
REVIEW
Erika Zemková, Dušan Hamar
Neuromuscular training in young athletes improves performance and decreases the risk of injuries during sports activities. These effects are primarily ascribed to the enhancement of muscle strength and power but also balance, speed and agility. However, most studies have failed to demonstrate significant improvement in these abilities. This is probably due to the fact that traditional tests do not reflect training methods (e.g., plyometric training vs. isometric or isokinetic strength testing, dynamic balance training vs...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29687688/impact-kinetics-associated-with-four-common-bilateral-plyometric-exercises
#6
Ethan Stewart, Thomas Kernozek, Hsien-Te Peng, Brian Wallace
BACKGROUND: This study quantified the peak vertical ground reaction force (VGRF), impulse, and average and instantaneous loading rates developed during bilateral plyometric exercises. METHODS: Fourteen collegiate male athletes performed four different bilateral plyometric exercises within a single testing session. Depth jumps from thirty, sixty and ninety centimeter heights (DJ30, DJ60, and DJ90, respectively), and a two consecutive jump exercise (2CJ), were randomly performed...
April 20, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29683771/wnt-signaling-related-osteokines-at-rest-and-following-plyometric-exercise-in-prepubertal-and-early-pubertal-boys-and-girls
#7
Panagiota Klentrou, Kirina Angrish, Nafisa Awadia, Nigel Kurgan, Rozalia Kouvelioti, Bareket Falk
PURPOSE: This study examined osteokines related to Wnt signaling at rest and in response to plyometric exercise in 12 boys [10.2 (0.4) y] and 12 girls [10.5 (0.4) y]. METHODS: One resting (preexercise) and 3 postexercise (5 min, 1 h, and 24 h) blood samples were analyzed for sclerostin, dickkopf-related protein 1 (DKK-1), osteoprotegerin (OPG), and receptor activator of nuclear factor kappa-β ligand (RANKL). RESULTS: Girls had higher resting sclerostin than boys [187...
April 23, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29619805/using-blood-lactate-concentration-to-predict-muscle-damage-and-jump-performance-response-to-maximal-stretch-shortening-cycle-exercise
#8
Vladimir Manojlović, Frane Erčulj
BACKGROUND: It is well known that eccentric muscle contractions induce delayed onset muscle soreness (DOMS) and exertional rhabdomyolysis (ERB), both of which are related to high blood levels of muscle damage markers after exercise. Creatine kinase (CK) is, together with some other markers (e.i. myoglobin, α-actin, skeletal troponin), widely used in determination of muscle damage. Moreover, DOMS after eccentric exercise has been shown to be associated with altered blood lactate concentration after subsequent submaximal or maximal cycling exercise...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29575090/gait-mechanics-and-tibiofemoral-loading-in-men-of-the-acl-sports-randomized-control-trial
#9
Jacob J Capin, Ashutosh Khandha, Ryan Zarzycki, Amelia J H Arundale, Melissa L Ziegler, Kurt Manal, Thomas S Buchanan, Lynn Snyder-Mackler
The risk for post-traumatic osteoarthritis is elevated after anterior cruciate ligament reconstruction (ACLR), and may be especially high among individuals with aberrant walking mechanics, such as medial tibiofemoral joint underloading 6 months postoperatively. Rehabilitation training programs have been proposed as one strategy to address aberrant gait mechanics. We developed the anterior cruciate ligament specialized post-operative return-to-sports (ACL-SPORTS) randomized control trial to test the effect of 10 post-operative training sessions consisting of strength, agility, plyometric, and secondary prevention exercises (SAPP) or SAPP plus perturbation (SAPP + PERT) training on gait mechanics after ACLR...
March 25, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29570574/sequencing-effects-of-plyometric-training-applied-before-or-after-regular-soccer-training-on-measures-of-physical-fitness-in-young-players
#10
Rodrigo Ramirez-Campillo, Cristian Alvarez, Paulo Gentil, Irineu Loturco, Javier Sanchez-Sanchez, Mikel Izquierdo, Jason Moran, Fabio Y Nakamura, Helmi Chaabene, Urs Granacher
To compare the effects of short-term (i.e., 7 week) plyometric training applied before (PJT-B) or after (PJT-A) soccer practice on components of physical fitness in young soccer players, a single-blind randomized controlled trial was conducted. Post-pubertal boys aged 17.0±0.5 years were allocated to three groups: PJT-B (n=12), PJT-A (n=14), and control (CON; n=12). The outcome measures included tests to evaluate 20-m speed, standing long jump [SLJ], squat jump [SJ], countermovement jump [CMJ], and drop jump [DJ], 20-m multistage shuttle running speed [MSSRT], and Illinois change of direction speed [ICODT]...
March 22, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29568749/postactivation-potentiation-following-acute-bouts-of-plyometric-versus-heavy-resistance-exercise-in-collegiate-soccer-players
#11
Sourabh Kumar Sharma, Shahid Raza, Jamal Ali Moiz, Shalini Verma, Irshad Husain Naqvi, Shahnawaz Anwer, Ahmad H Alghadir
Postactivation potentiation is referred to as an acute and temporary enhancement of muscle performance resulting from previous muscle contraction. The purpose of this study was to compare the acute effect of plyometric exercise (PLY) and heavy-resistance exercise (RES) on the blood lactate level (BLa) and physical performance. Fourteen male collegiate soccer players were randomized to perform either RES or PLY first and then crossed over to perform the opposite intervention. PLY consisted of 40 jumps, whereas RES comprised ten single repetitions at 90% of one repetition maximum...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29547489/the-impact-of-power-clean-ability-and-training-age-on-adaptations-to-weightlifting-style-training
#12
Lachlan P James, Paul Comfort, Timothy J Suchomel, Vincent G Kelly, Emma M Beckman, G Gregory Haff
The purpose of this investigation was to determine whether weightlifting actions are a viable method for improving athletic performance amongst weaker, inexperienced lifters when compared to individuals with a greater power clean result, and hence weightlifting ability and experience. Two groups of males with distinctly different power clean performances (higher performance (HP): N = 8; BM = 78.1±4.0 kg; 1RM PC = 1.08±0.09 kgBM; lower performance (LP): N = 8; BM=82.6±14.0 kg; 1RM PC=0.78±0.1 kg·BM) and resistance training age (HP: resistance training experience=3...
March 14, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29543700/variability-of-plyometric-and-ballistic-exercise-technique-maintains-jump-performance
#13
Phillip T Chandler, Matthew Greig, Paul Comfort, John J McMahon
Chandler, PT, Greig, M, Comfort, P, and McMahon, JJ. Variability of plyometric and ballistic exercise technique maintains jump performance. J Strength Cond Res 32(6): 1571-1582, 2018-The aim of this study was to investigate changes in vertical jump technique over the course of a training session. Twelve plyometric and ballistic exercise-trained male athletes (age = 23.4 ± 4.6 years, body mass = 78.7 ± 18.8 kg, height = 177.1 ± 9.0 cm) performed 3 sets of 10 repetitions of drop jump (DJ), rebound jump (RJ) and squat jump (SJ)...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29533358/kinetic-analysis-of-horizontal-plyometric-exercise-intensity
#14
Andrew J Kossow, William P Ebben
Kossow, AJ, DeChiara, TG, Neahous, SM, and Ebben, WP. Kinetic analysis of horizontal plyometric exercise intensity. J Strength Cond Res 32(5): 1222-1229, 2018-Plyometric exercises are frequently performed as part of a strength and conditioning program. Most studies assessed the kinetics of plyometric exercises primarily performed in the vertical plane. The purpose of this study was to evaluate the multiplanar kinetic characteristics of a variety of plyometric exercises, which have a significant horizontal component...
May 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29470365/effect-of-acute-complex-training-on-upper-body-force-and-power-in-collegiate-wrestlers
#15
Margaret T Jones, Jonathan M Oliver, John C Delgado, Justin J Merrigan, Andrew R Jagim, Charles E Robison
To determine if chain bench press (BP) exercise would enhance acute upper body force and power, 13 collegiate male wrestlers (mean ± SD; 20.5 ± 1 years; 174.3 ± 4.2 cm; 76.5 ± 8.3 kg) with ≥ 1 year of strength training participated. Session 1 included body composition ((BodPod) 8.5 ± 2.6 %body fat)), 3 repetition maximum (RM) BP, and familiarization with the plyometric push-up (PPU) on a force plate. Athletes were matched for 3RM BP and randomly assigned to one of two groups: Chain BP or Plate BP. One week after Session 1, athletes performed the experimental protocol which consisted of: Baseline PPU, Chain/Plate BP Set 1 (6 reps @ 60%), 30 sec rest, PPU, 3 min rest, Chain/Plate BP Set 2 (6 reps @60%), 30 sec rest, and PPU...
February 20, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29431546/the-trainability-of-adolescent-soccer-players-to-brief-periodized-complex-training
#16
Athanasios Chatzinikolaou, Konstantinos Michaloglou, Alexandra Avloniti, Diamanda Leontsini, Chariklia K Deli, Dimitris Vlachopoulos, Luis Gracia-Marco, Sotirios Arsenis, Ioannis Athanailidis, Dimitrios Draganidis, Athanasios Z Jamurtas, Craig A Williams, Ioannis G Fatouros
PURPOSE: Τo investigate the effect of a complex, short-term strength/power training protocol on performance and body composition of elite early-adolescent soccer players. METHODS: Twenty-two players (14-15 years) were randomly assigned to (a) an experimental (EG, n=12, participated in a 5-week training protocol with traditional multi-joint power resistance exercises, Olympic-style lifts, plyometric drills and speed work, four times/week) or (b) a control group (CG, n=10)...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29424273/neuromuscular-physiology-exercise-and-training-during-youth-the-year-that-was-2017
#17
David G Behm
The pressure for children to excel and succeed in sport continues to mount. Although resistance training for youth was in disfavor by many organizations even into the early 21st century, children's training programs are more closely resembling the volume and intensity of adult programs. The physiological maturation of adolescent youth may impact their response to advanced training programs. Furthermore, the pressure to specialize in specific sports rather than engage in a variety of sporting activities may affect not only training responses but also injury incidence...
February 1, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29410564/correlations-between-measurement-time-and-different-expansibility-of-the-elastic-tape-on-the-rectus-femoris-and-body-sway-index-with-plyometric-exercise
#18
Jung-Gyu Yoon
[Purpose] The purpose of this study was to examine correlations between measurement time and different expansibility of the elastic tape on the rectus femoris and body sway index with plyometric exercise. [Subjects and Methods] The subjects of this study were 24 healthy men. C90 area, C90 angle, trace length, sway average velocity for body sway index were measured using a force plate by BT4. The collected data were analyzed using Kendall's coefficient of concordance. [Results] All of body sway index on measuring follow up 24 hours after removing tape were significantly decreased than before and right after plyometric exercise...
January 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29401197/effects-of-an-8-week-body-weight-neuromuscular-training-on-dynamic-balance-and-vertical-jump-performances-in-elite-junior-skiing-athletes-a-randomized-controlled-trial
#19
Jacopo A Vitale, Antonio La Torre, Giuseppe Banfi, Matteo Bonato
Vitale, JA, La Torre, A, Banfi, G, and Bonato, M. Effects of an 8-week body-weight neuromuscular training on dynamic balance and vertical jump performances in elite junior skiing athletes: a randomized controlled trial. J Strength Cond Res 32(4): 911-920, 2018-The aim of the present randomized controlled trial was to evaluate the effects of an 8-week neuromuscular training program focused on core stability, plyometric, and body-weight strengthening exercises on dynamic postural control and vertical jump performance in elite junior skiers...
April 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29399735/rotator-cuff-repair-post-operative-rehabilitation-concepts
#20
REVIEW
Terrance A Sgroi, Michelle Cilenti
PURPOSE OF REVIEW: With improvements in surgical techniques and increased knowledge of rotator cuff healing, there was a need to identify a safe progression after rotator cuff repair. The rehabilitation specialist plays an integral role in the care of these patients, and by implementing an evidence and criteria-based model, patients may be able to return to their prior levels of function sooner with fewer complications. RECENT FINDINGS: Timing of progression for rotator cuff patients should align not only with healing but also potential strain on the involved tissue...
March 2018: Current Reviews in Musculoskeletal Medicine
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