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https://www.readbyqxmd.com/read/28426514/comparison-of-the-hang-high-pull-and-loaded-jump-squat-for-the-development-of-vertical-jump-and-isometric-force-time-characteristics
#1
Dustin J Oranchuk, Tracey L Robinson, Zachary J Switaj, Eric J Drinkwater
Weightlifting movements have high skill demands and require expert coaching. Loaded jumps have a comparably lower skill demand, but may be similarly effective for improving explosive performance. The purpose of this study was to compare vertical jump performance, isometric force, and rate of force development (RFD) following a ten-week intervention employing the hang high-pull (hang-pull) or trap-bar jump squat (jump-squat). Eighteen NCAA Division II swimmers (8 males, 10 females) with at least one year of resistance training experience volunteered to participate...
April 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28426511/an-evaluation-of-time-trial-based-predictions-of-v-combining-dot-above-o2max-and-recommended-training-paces-for-collegiate-and-recreational-runners
#2
E M Scudamore, V W Barry, J M Coons
The purpose of the current study was to determine the accuracy of Jack Daniels' VDOT Running Calculator for the prediction of V[Combining Dot Above]O2max, and recommendations of interval and training paces (pIN & pTH) in samples of NCAA Division 1 track athletes (ATH, n = 11) and recreational runners (REC; n = 9). Predicted variable data were obtained using results from indoor 5km time-trials. Data from the VDOT calculator was compared to laboratory tested V[Combining Dot Above]O2max, pace at V[Combining Dot Above]O2max (V[Combining Dot Above]O2maxpace), and lactate threshold pace (LTpace)...
April 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28423285/the-epidemiology-of-high-ankle-sprains-in-national-collegiate-athletic-association-sports
#3
Timothy C Mauntel, Erik A Wikstrom, Karen G Roos, Aristarque Djoko, Thomas P Dompier, Zachary Y Kerr
BACKGROUND: Ankle sprains are among the most common injuries experienced by collegiate athletes. The type of ankle sprain is rarely differentiated in epidemiological studies. This differentiation is necessary, as each ankle sprain type has a unique injury mechanism and recovery period. High ankle sprains commonly result in long recovery periods. Thus, a further examination of the epidemiology of high ankle sprains is warranted. PURPOSE: To describe the epidemiology of high ankle sprains in National Collegiate Athletic Association (NCAA) sports during the 2009/2010-2014/2015 academic years...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28422586/the-reactive-strength-index-reflects-vertical-stiffness-during-drop-jumps
#4
Kristof Kipp, Michael T Kiely, Matthew D Giordanelli, Philip J Malloy, Christopher F Geiser
The reactive strength index (RSI) is often used to quantify drop jump (DJ) performance; however, not much is known about the biomechanical determinants of the RSI. The purpose of this study was to investigate the correlations between the RSI and several biomechanical variables calculated from DJ performed with different initial drop heights. Twelve, male NCAA DI basketball players performed DJ from drop heights of 30, 45, and 60 cm. Force plates were used to calculate DJ performance parameters (i.e., DJ height, contact time, and RSI) and DJ biomechanical variables (i...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28413876/generation-of-an-orthogonal-protein-protein-interface-with-a-noncanonical-amino-acid
#5
Minseob Koh, Fariborz Nasertorabi, Gye Won Han, Raymond C Stevens, Peter G Schultz
We have engineered the protein interface of the Escherichia coli chorismate mutase (EcCM) homodimer to be dependent on incorporation of a noncanonical amino acid (ncAA) at residue 72. The large hydrophobic amino acid p-benzoyl phenylalanine (pBzF) was substituted for Tyr72, which led to a catalytically inactive protein. A library of five residues (Leu25', Arg29', Leu76, Ile80' and Asp83') surrounding pBzF72 was generated and subjected to a growth based selection in a chorismate mutase deficient strain. An EcCM variant (Phe25', pBzF72, Thr76, Gly80' and Tyr83') forms a stable homodimer, has catalytic activity similar to the wild type enzyme, and unfolds with a Tm of 53 °C...
April 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28393012/the-effect-of-repetitive-subconcussive-collisions-on-brain-integrity-in-collegiate-football-players-over-a-single-football-season-a-multi-modal-neuroimaging-study
#6
Semyon M Slobounov, Alexa Walter, Hans C Breiter, David C Zhu, Xiaoxiao Bai, Tim Bream, Peter Seidenberg, Xianglun Mao, Brian Johnson, Thomas M Talavage
The cumulative effect of repetitive subconcussive collisions on the structural and functional integrity of the brain remains largely unknown. Athletes in collision sports, like football, experience a large number of impacts across a single season of play. The majority of these impacts, however, are generally overlooked, and their long-term consequences remain poorly understood. This study sought to examine the effects of repetitive collisions across a single competitive season in NCAA Football Bowl Subdivision athletes using advanced neuroimaging approaches...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28383282/epidemiology-of-quadriceps-strains-in-national-collegiate-athletic-association-athletes-2009-2010-through-2014-2015
#7
Timothy G Eckard, Zachary Y Kerr, Darin A Padua, Aristarque Djoko, Thomas P Dompier
CONTEXT:   Few researchers have examined the rates and patterns of quadriceps strains in student-athletes in the National Collegiate Athletic Association (NCAA). OBJECTIVE:   To describe the epidemiology of quadriceps strains in 25 NCAA sports during the 2009-2010 through 2014-2015 academic years. DESIGN:   Descriptive epidemiology study. SETTING:   Convenience sample of NCAA programs from 25 sports during the 2009-2010 through 2014-2015 academic years...
April 6, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28383180/two-tier-screening-platform-for-directed-evolution-of-aminoacyl-trna-synthetases-with-enhanced-stop-codon-suppression-efficiency
#8
Andrew E Owens, Katherine T Grasso, Christine A Ziegler, Rudi Fasan
Genetic code expansion via amber stop suppression provides a powerful tool for introducing non-proteinogenic functionalities into proteins for a broad range of applications. Here, we report the implementation of a versatile platform for the development of engineered aminoacyl-tRNA synthetases with enhanced efficiency in mediating ncAA incorporation via amber stop codon suppression. This system integrates a white/blue colony screen with a plate-based colorimetric assay, thereby combining high-throughput capabilities with reliable and quantitative measurement of AARS-dependent ncAA incorporation efficiency...
April 6, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28371162/protein-crosslinking-by-genetically-encoded-noncanonical-amino-acids-with-reactive-aryl-carbamate-side-chains
#9
Weimin Xuan, Sida Shao, Peter G Schultz
The use of genetically encoded noncanonical amino acids (ncAAs) to construct crosslinks within or between proteins has emerged as a useful method to enhance protein stability, investigate protein-protein interactions, and improve the pharmacological properties of proteins. We report ncAAs with aryl carbamate side chains (PheK and FPheK) that can react with proximal nucleophilic residues to form intra- or intermolecular protein crosslinks. We evolved a pyrrolysyl-tRNA synthetase that incorporates site-specifically PheK and FPheK into proteins in both E...
April 3, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28365744/normative-data-for-a-comprehensive-neuropsychological-test-battery-used-in-the-assessment-of-sports-related-concussion
#10
Victoria C Merritt, Jessica E Meyer, Margaret H Cadden, Cristina A F Roman, Dede M Ukueberuwa, Michael D Shapiro, Peter A Arnett
Objective: The use of normative data is a hallmark of the neuropsychological assessment process. Within the context of sports-related concussion, utilizing normative data is especially essential when individualized baseline data are unavailable for comparison. The primary purpose of this study was to establish normative data for a comprehensive neuropsychological test battery used in the assessment of sports-related concussion. A secondary aim was to provide normative data for pertinent demographic variables relevant to the assessment of college athletes, including sex, previous head injuries (PHI), and history of attention deficit hyperactivity disorder (ADHD)/learning disability (LD)...
March 1, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28362160/epidemiology-of-skin-infections-in-men-s-wrestling-analysis-of-2009-2010-through-2013-2014-national-collegiate-athletic-association-surveillance-data
#11
Mackenzie M Herzog, Melissa A Fraser, Johna K Register-Mihalik, Zachary Y Kerr
CONTEXT:   Our knowledge of the current epidemiology of skin infections among wrestlers is limited. OBJECTIVE:   To analyze and report the epidemiology of skin infections among National Collegiate Athletic Association (NCAA) men's wrestling student-athletes during the 2009-2010 through 2013-2014 academic years. DESIGN:   Descriptive epidemiology study. SETTING:   Aggregate skin infection and exposure data collected by the NCAA Injury Surveillance Program...
March 31, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28355980/star-excursion-balance-test-anterior-asymmetry-is-associated-with-injury-status-in-division-i-collegiate-athletes
#12
Mikel R Stiffler, David R Bell, Jennifer L Sanfilippo, Scott J Hetzel, Kristen A Pickett, Bryan C Heiderscheit
Study Design Retrospective cohort. Background Star Excursion Balance Test (SEBT) performance differs by sport in healthy collegiate athletes and lower extremity injury rates also vary among sports, sex, and athletic exposure. The relationship between SEBT performance and injury risk has not been evaluated with consideration of these additional variables which may be necessary to fully describe the relationship between SEBT performance and injury risk. Objectives To assess the association between pre-season SEBT performance and non-contact injury occurrence to the knee or ankle in Division I collegiate athletes when controlling for sport, sex, and athletic exposure...
March 29, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28349568/audiovestibular-symptoms-as-predictors-of-prolonged-sports-related-concussion-among-ncaa-athletes
#13
Stephen R Chorney, Amar C Suryadevara, Brian D Nicholas
OBJECTIVE: We looked to determine the rates of audiovestibular symptoms following sports-related concussions among collegiate athletes. Further, we assessed the correlation between these symptoms and the time to return to participation in athletic activity. STUDY DESIGN: Retrospective analysis of the National Collegiate Athletic Association Injury Surveillance System (NCAA-ISS). METHODS: The NCAA-ISS was queried from 2009 through 2014 for seven men's sports and eight women's sports across divisions 1, 2, and 3...
March 27, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28344452/the-effects-of-a-sports-nutrition-education-intervention-on-nutritional-status-sport-nutrition-knowledge-body-composition-and-performance-during-off-season-training-in-ncaa-division-i-baseball-players
#14
Fabrício Eduardo Rossi, Andrew Landreth, Stacey Beam, Taylor Jones, Layne Norton, Jason Michael Cholewa
This study investigated the effects of a sport nutrition education intervention (SNEI) on dietary intake, knowledge, body composition, and performance in NCAA Division I baseball players. Resistance trained NCAA Division I baseball players (82.4 ± 8.2 kg; 1.83 ± 0.06 m; 13.7 ± 5 % body fat) participated in the study during 12 weeks of off-season training. Fifteen players volunteered for SNEI while 15 players matched for position served as controls (C) for body composition and performance. The nutrition intervention group (NI) received a 90 min SNEI encompassing energy intake (Kcal), carbohydrate (CHO), protein (PRO), fat, food sources, and hydration...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28323494/associations-between-thematic-content-and-industry-self-regulation-code-violations-in-beer-advertising-broadcast-during-the-u-s-ncaa-basketball-tournament
#15
Jonathan K Noel, Ziming Xuan, Thomas F Babor
BACKGROUND: Beer marketing in the United States is controlled through self-regulation, whereby the beer industry has created a marketing code and enforces its use. We performed a thematic content analysis on beer ads broadcast during a U.S. college athletic event and determined which themes are associated with violations of a self-regulated alcohol marketing code. METHODS: 289 beer ads broadcast during the U.S. NCAA Men's and Women's 1999-2008 basketball tournaments were assessed for the presence of 23 thematic content areas...
March 21, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28323071/the-central-role-of-trna-in-genetic-code-expansion
#16
REVIEW
Noah M Reynolds, Oscar Vargas-Rodriguez, Dieter Söll, Ana Crnković
BACKGROUND: The development of orthogonal translation systems (OTSs) for genetic code expansion (GCE) has allowed for the incorporation of a diverse array of non-canonical amino acids (ncAA) into proteins. Transfer RNA, the central molecule in the translation of the genetic message into proteins, plays a significant role in the efficiency of ncAA incorporation. SCOPE OF REVIEW: Here we review the biochemical basis of OTSs for genetic code expansion. We focus on the role of tRNA and discuss strategies used to engineer tRNA for the improvement of ncAA incorporation into proteins...
March 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28292694/asb-clinical-biomechanics-award-winner-2016-assessment-of-gaze-stability-within-24-48hours-post-concussion
#17
Nicholas G Murray, Nathan R D'Amico, Douglas Powell, Megan E Mormile, Katelyn E Grimes, Barry A Munkasy, Russell K Gore, Rebecca J Reed-Jones
BACKGROUND: Approximately 90% of athletes with concussion experience a certain degree of visual system dysfunction immediately post-concussion. Of these abnormalities, gaze stability deficits are denoted as among the most common. Little research quantitatively explores these variables post-concussion. As such, the purpose of this study was to investigate and compare gaze stability between a control group of healthy non-injured athletes and a group of athletes with concussions 24-48hours post-injury...
March 6, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28288813/a-genomically-modified-escherichia-coli-strain-carrying-an-orthogonal-e-coli-histidyl-trna-synthetase%C3%A2-trna-his-pair
#18
Markus Englert, Oscar Vargas-Rodriguez, Noah M Reynolds, Yane-Shih Wang, Dieter Söll, Takuya Umehara
BACKGROUND: Development of new aminoacyl-tRNA synthetase (aaRS)•tRNA pairs is central for incorporation of novel non-canonical amino acids (ncAAs) into proteins via genetic code expansion (GCE). The Escherichia coli and Caulobacter crescentus histidyl-tRNA synthetases (HisRS) evolved divergent mechanisms of tRNA(His) recognition that prevent their cross-reactivity. Although the E. coli HisRS•tRNA(His) pair is a good candidate for GCE, its use in C. crescentus is limited by the lack of established genetic selection methods and by the low transformation efficiency of C...
March 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28281095/a-national-study-on-the-effects-of-concussion-in-collegiate-athletes-and-us-military-service-academy-members-the-ncaa-dod-concussion-assessment-research-and-education-care-consortium-structure-and-methods
#19
Steven P Broglio, Michael McCrea, Thomas McAllister, Jaroslaw Harezlak, Barry Katz, Dallas Hack, Brian Hainline
BACKGROUND: The natural history of mild traumatic brain injury (TBI) or concussion remains poorly defined and no objective biomarker of physiological recovery exists for clinical use. The National Collegiate Athletic Association (NCAA) and the US Department of Defense (DoD) established the Concussion Assessment, Research and Education (CARE) Consortium to study the natural history of clinical and neurobiological recovery after concussion in the service of improved injury prevention, safety and medical care for student-athletes and military personnel...
March 9, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28277424/comparing-performance-during-morning-vs-afternoon-training-sessions-in-intercollegiate-basketball-players
#20
Aaron D Heishman, Michael A Curtis, Ethan Saliba, Robert J Hornett, Steven K Malin, Arthur L Weltman
Time of day is a key factor that influences the optimization of athletic performance. Intercollegiate coaches oftentimes hold early morning strength training sessions for a variety of factors including convenience. However, few studies have specifically investigated the effect of early morning vs. late afternoon strength training on performance indices of fatigue. This is athletically important because circadian/ultradian rhythms and alterations in sleep patterns can impact training ability. Therefore, the purpose of the present study was to examine the effects of morning vs...
March 8, 2017: Journal of Strength and Conditioning Research
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