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https://www.readbyqxmd.com/read/29028445/return-to-sport-specific-performance-after-primary-anterior-cruciate-ligament-reconstruction-a-systematic-review
#1
Nicholas G Mohtadi, Denise S Chan
BACKGROUND: Physicians counseling athletes on the prognosis of sport-specific performance outcomes after anterior cruciate ligament reconstruction (ACLR) depend on the published literature. However, critical appraisal of the validity and biases in these studies is required to understand how ACLR affects an athlete's ability to return to sport, the athlete's sport-specific performance, and his or her ability to achieve preinjury levels of performance. PURPOSE: This review identifies the published prognostic studies evaluating sport-specific performance outcomes after ACLR...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29027102/current-status-of-the-female-athlete-triad-update-and-future-directions
#2
REVIEW
Mary Jane De Souza, Kristen J Koltun, Clara V Etter, Emily A Southmayd
PURPOSE OF REVIEW: This review provides an update on the primary clinical sequelae of the Female Athlete Triad. RECENT FINDINGS: Scientific advancements have contributed to improve understanding of Triad-related conditions, including leptin's role as a potential neuroendocrine link between energy status and reproductive function. Use of finite element analysis of HRpQCT imaging has provided a more accurate assessment of bone geometry and bone strength and may be clinically relevant...
October 11, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/29024682/history-of-concussion-impacts-electrophysiological-correlates-of-working-memory
#3
Caitlin M Hudac, Cathryn S Cortesa, Patrick S Ledwidge, Dennis L Molfese
Sports-related concussions occur in approximately 21% of college athletes with implications for long-term cognitive impairments in working memory. Working memory involves the capacity to maintain short-term information and integrate with higher-order cognitive processing for planning and behavior execution, critical skills for optimal cognitive and athletic performance. This study quantified working memory impairments in 36 American football college athletes (18-23years old) using event-related potentials (ERPs)...
October 9, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29023331/effects-of-plyometric-training-on-components-of-physical-fitness-in-prepuberal-male-soccer-athletes-the-role-of-surface-instability
#4
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Bessem Mkaouer, Younés Hachana, Urs Granacher
Negra, Y, Chaabene, H, Sammoud, S, Bouguezzi, R, Mkaouer, B, Hachana, Y, and Granacher, U. Effects of plyometric training on components of physical fitness in prepuberal male soccer athletes: the role of surface instability. J Strength Cond Res XX(X): 000-000, 2017-Previous studies contrasted the effects of plyometric training (PT) conducted on stable vs. unstable surfaces on components of physical fitness in child and adolescent soccer players. Depending on the training modality (stable vs. unstable), specific performance improvements were found for jump (stable PT) and balance performances (unstable PT)...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29023329/living-and-training-at-825m-for-8-weeks-supplemented-with-intermittent-hypoxic-training-at-3000m-improves-blood-parameters-and-running-performance
#5
Preetiwat Wonnabussapawich, Michael J Hamlin, Catherine A Lizamore, Nuttaset Manimmanakorn, Naruemon Leelayuwat, Orathai Tunkamnerdthai, Worrawut Thuwakum, Apiwan Manimmanakorn
We aimed to investigate the effect of an 8-week low-altitude training block supplemented with intermittent hypoxic training, on blood and performance parameters in soccer players. Forty university-level male soccer players were separated into altitude (n = 20, 825m) or sea level (n = 20, 125m) groups. Before (1-2 days prior) and after (1 and 14 days post) training, players were asked to give a resting venous blood sample and complete a series of performance tests. Compared to sea level, the altitude group increased erythropoietin, red cell count and hematocrit 1 day post training (42...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29023328/strength-and-conditioning-habits-of-competitive-distance-runners
#6
Richard C Blagrove, Nicola Brown, Glyn Howatson, Philip R Hayes
Blagrove, RC, Brown, N, Howatson, G, and Hayes, PR. Strength and conditioning habits of competitive distance runners. J Strength Cond Res XX(X): 000-000, 2017-Targeted strength and conditioning (S&C) programs can potentially improve performance and reduce injury risk factors in competitive runners. However, S&C practices of distance runners are unknown. This study aimed to explore S&C practices of competitive middle- and long-distance runners and examined whether reported frequency of injuries was influenced by training behaviors...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29023325/performance-and-health-related-characteristics-of-male-athletes-using-marijuana
#7
Jonathon K Lisano, Jeremy D Smith, Alissa B Mathias, Matt Christensen, Peter Smoak, Kristina T Phillips, Colin J Quinn, Laura K Stewart
The influence of chronic marijuana use on the performance and health of physically active individuals has yet to be fully elucidated. The purpose of this study was to explore pulmonary function, aerobic and anaerobic fitness, strength, serum testosterone, cortisol, C-reactive protein (CRP), Δ-9-tetrahydrocannibinol (THC), 11-nor-9-carboxy-Δ-9-tetrahydrocannibinol (THC-COOH), and 11-hydroxy-Δ-9-tetrahydrocannibinol (THC-OH) concentrations in a physically active population either using or not using marijuana...
October 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29023280/corrective-exercises-improve-movement-efficiency-and-sensorimotor-function-but-not-fatigue-sensitivity-in-chronic-ankle-instability-patients-a-randomized-controlled-trial
#8
Sajad Bagherian, Nader Rahnama, Erik A Wikstrom
OBJECTIVE: To investigate the effect of corrective exercises on functional movement patterns, sensorimotor function, self-reported function, and fatigue sensitivity in collegiate athletes with chronic ankle instability (CAI). DESIGN: A randomized controlled trial. SETTING: Laboratory of sports sciences. PARTICIPANTS: Forty male volunteers were randomly assigned to the experimental group (age 21.2 ± 1.7 years, height 174...
October 6, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29023277/diagnosis-and-treatment-of-slipping-rib-syndrome
#9
Cassidy M Foley, Dai Sugimoto, David P Mooney, William P Meehan, Andrea Stracciolini
OBJECTIVE: (1) To investigate the clinical presentation, diagnosis, and treatment of slipping rib syndrome in athletes; (2) to investigate the hooking maneuver for diagnosis of slipping rib syndrome. DESIGN: Retrospective chart review of 362 athletes with rib pain. SETTING: Pediatric-based sports medicine clinic between January 1, 1999, and March 1, 2014. PATIENTS: Costochondritis, Tietze, fractures, rib tip syndrome, and unclear diagnoses were excluded...
October 6, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29023194/factors-that-drive-youth-specialization
#10
Ajay S Padaki, Charles A Popkin, Justin L Hodgins, David Kovacevic, Thomas Sean Lynch, Christopher S Ahmad
BACKGROUND: Specialization in young athletes has been linked to overuse injuries, burnout, and decreased satisfaction. Despite continued opposition from the medical community, epidemiological studies suggest the frequency is increasing. HYPOTHESIS: Extrinsic pressures in addition to individual aspirations drive this national trend in sports specialization. STUDY DESIGN: Descriptive epidemiology study. LEVEL OF EVIDENCE: Level 3...
October 1, 2017: Sports Health
https://www.readbyqxmd.com/read/29021910/the-training-type-influence-on-male-elite-athletes-ventilatory-function
#11
Tijana Durmic, Biljana Lazovic Popovic, Mirjana Zlatkovic Svenda, Marina Djelic, Vladimir Zugic, Tamara Gavrilovic, Zoran Mihailovic, Marija Zdravkovic, Roman Leischik
BACKGROUND/AIM: To assess and compare measured ventilatory volumes (forced expiratory volume in 1 s (FEV1), peak expirium flow (PEF) and maximal voluntary ventilation (MVV)), ventilatory function capacities (forced vital capacity (FVC) and vital capacity (VC)) and FEV1/VC ratio in a sample of power and endurance elite athletes and their age-matched and sex-matched sedentary control group. METHODS: A cross-sectional study was applied on male elite athletes (n=470) who were classified according to the type of the predominantly performed exercise in the following way: group 1: endurance group (EG=270), group 2: power athletes group (SG=200) and group 3: sedentary control group (CG=100)...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29021905/the-waterpolo-shoulder-paradigm-results-of-ultrasound-surveillance-at-poolside
#12
Felice Galluccio, Eleonora Bellucci, Francesco Porta, Lorenzo Tofani, Amato De Paulis, Diana Bianchedi, Tatiana Barskova, Marco Matucci-Cerinic
BACKGROUND: Waterpolo consists of a combination of swimming and throwing with close contact between players. The shoulder is the most frequently injured joint, with a combination of rotator cuff tear and tendinopathy, long head biceps tendinopathy, superior labral lesions and shoulder impingement. This unique combination is a challenge for the clinician who must determine which of these shoulder pathologies is responsible for the onset of pain and the best strategy to rehabilitate the joint and prevent recurrence...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29019867/the-effects-of-various-weighted-implements-on-baseball-swing-kinematics-in-collegiate-baseball-players
#13
Charles C Williams, Jacob R Gdovin, Samuel J Wilson, Vanessa L Cazas-Moreno, John D Eason, Elizabeth L Hoke, Charles R Allen, Chip Wade, John C Garner
The purpose of this study was to investigate the effects of different warm-up (WU) devices on bat swing parameters including maximal resultant velocity (MRV), resultant velocity at ball contact (RVBC), time difference between MRV and RVBC, bat angle at MRV, bat angle at RVBC, and perceptual differences (PD) of each WU implement utilized by National Collegiate Athletic Association (NCAA) Division-I baseball players. Fifteen varsity baseball players completed one experimental session during fall training. Retro-reflective markers were placed on the bat and tee to measure basic bat kinematics during the swing...
June 3, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29019442/the-use-of-hamstring-fatigue-to-reduce-quadriceps-inhibition-after-anterior-cruciate-ligament-reconstruction
#14
Timothy Lowe, Xuanliang Neil Dong
Arthrogenic muscle inhibition, an inability to fully activate the quadriceps muscles, has been persistently observed after anterior cruciate ligament reconstruction (ACLr) surgery. Reductions in quadriceps activation may be partly due to the flexion reflex pathway, hamstrings activation, and reciprocal quadriceps inhibition. Since central fatigue has been shown to modify hamstring excitability and change the hamstring reflex response, hamstring fatigue might alleviate quadriceps muscle inhibition by counteracting the flexion reflex...
January 1, 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/29018542/spatiotemporal-characteristics-of-motor-actions-by-blind-long-jump-athletes
#15
Miguel Angel Torralba, José María Padullés, Jose Luis Losada, Jose Luis López
BACKGROUND: Blind people depend on spatial and temporal representations to perform activities of daily living and compete in sport. OBJECTIVE: The aim of this study is to determine the spatiotemporal characteristics of long jumps performed by blind athletes and compare findings with those reported for sighted athletes. METHODS: We analysed a sample of 12 male athletes competing in the F11 Long Jump Finals at the Paralympic Games in London 2012...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29018362/effects-of-unloaded-vs-loaded-plyometrics-on-speed-and-power-performance-of-elite-young-soccer-players
#16
Ronaldo Kobal, Lucas A Pereira, Vinicius Zanetti, Rodrigo Ramirez-Campillo, Irineu Loturco
The purpose of this study was to investigate the effects of loaded and unloaded plyometric training strategies on speed and power performance of elite young soccer players. Twenty-three under-17 male soccer players (age: 15.9 ± 1.2 years, height: 178.3 ± 8.1 cm, body-mass (BM): 68.1 ± 9.3 kg) from the same club took part in this study. The athletes were pair-matched in two training groups: loaded vertical and horizontal jumps using an haltere type handheld with a load of 8% of the athletes' body mass (LJ; n = 12) and unloaded vertical and horizontal plyometrics (UJ; n = 11)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29018359/that-escalated-quickly-planning-to-ignore-rpe-can-backfire
#17
Maik Bieleke, Wanja Wolff
Ratings of perceived exertion (RPE) are routinely assessed in exercise science and RPE is substantially associated with physiological criterion measures. According to the psychobiological model of endurance, RPE is a central limiting factor in performance. While RPE is known to be affected by psychological manipulations, it remains to be examined whether RPE can be self-regulated during static muscular endurance exercises to enhance performance. In this experiment, we investigate the effectiveness of the widely used and recommended self-regulation strategy of if-then planning (i...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29018355/criterion-validity-of-commercially-available-physical-activity-tracker-to-estimate-step-count-covered-distance-and-energy-expenditure-during-sports-conditions
#18
Yvonne Wahl, Peter Düking, Anna Droszez, Patrick Wahl, Joachim Mester
Background: In the past years, there was an increasing development of physical activity tracker (Wearables). For recreational people, testing of these devices under walking or light jogging conditions might be sufficient. For (elite) athletes, however, scientific trustworthiness needs to be given for a broad spectrum of velocities or even fast changes in velocities reflecting the demands of the sport. Therefore, the aim was to evaluate the validity of eleven Wearables for monitoring step count, covered distance and energy expenditure (EE) under laboratory conditions with different constant and varying velocities...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29017017/the-effect-of-resistance-training-set-configuration-on-strength-power-and-hormonal-adaptation-in-female-volleyball-players
#19
Hamid Arazi, Aida Khanmohammadi, Abbas Asadi, G Gregory Haff
The primary purpose of this investigation was to determine the impact of altering the set structure during an 8-week resistance training program on anthropometric, hormonal, and strength power characteristics. Thirty female volleyball players were recruited for participation and then randomly assigned to one of three resistance training groups: 1) cluster sets (CRT; n=10), 2) traditional sets (TRT: n=10), or 3) control (CON: n=10). All athletes were evaluated for thigh and arm circumference, vertical jump (VJ), 20-m sprint, 4x9-m shuttle-run, 1 repetition maximum (1RM) back squat, bench press, military press, and deadlift prior to and after an 8-week periodized training intervention...
October 10, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29016482/relationship-between-physical-performance-testing-results-and-peak-running-intensity-during-professional-rugby-league-match-play
#20
Grant M Duthie, Heidi R Thornton, Jace A Delaney, James T McMahon, Dean T Benton
The purpose of this study was to examine the relationship between individual athletes' physical characteristics and both the peak running intensities and the decline in peak running intensities during competition. Twenty-two professional rugby league athletes (age; 24.1 ± 4.0 years, body mass; 101.4 ± 9.5 kg) underwent a series of physical testing procedures. Peak running intensity was determined using a moving average technique, applied to the speed (m·min), acceleration/deceleration (m·s) and metabolic power (W·kg) during competition, across 10 different durations...
October 7, 2017: Journal of Strength and Conditioning Research
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