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Simon Steib, Peter Zahn, Christine Zu Eulenburg, Klaus Pfeifer, Astrid Zech
BACKGROUND: Female handball athletes are at a particular risk of sustaining lower extremity injuries. The study examines time-dependent adaptations of static and dynamic balance as potential injury risk factors to a specific warm-up program focusing on neuromuscular control. METHODS: Fourty one (24.0 ± 5.9 years) female handball athletes were randomized to an intervention or control group. The intervention group implemented a 15-min specific neuromuscular warm-up program, three times per week for eleven weeks, whereas the control group continued with their regular warm-up...
2016: BMC Sports Science, Medicine and Rehabilitation
Rohit Tejwani, Hsin-Hsiao S Wang, Jessica C Lloyd, Paul J Kokorowski, Caleb P Nelson, Jonathan C Routh
BACKGROUND: The advent of online task-distribution has opened a new avenue to efficiently gather community perspectives needed for utility estimation. Methodological consensus for estimating pediatric utilities is lacking, with disagreement over whom to sample, what perspective (patient vs. parent), and whether instrument-induced anchoring bias is significant. We sought to determine what methodological factors potentially impact utility estimates for vesicoureteral reflux (VUR). DESIGN: Cross-sectional surveys using a time-trade-off (TTO) instrument were conducted via Amazon's Mechanical Turk online interface; respondents were randomized to answer questions from child, parent, or dyad perspectives on the utility of a VUR health state and one of three "warm-up" scenarios (paralysis, common cold, none) prior to a VUR scenario...
October 13, 2016: Journal of Urology
Austyn L Nealer, Dustin D Dunnick, Kylie K Malyszek, Megan A Wong, Pablo B Costa, Jared W Coburn, Lee E Brown
Speed is a crucial element an athlete must possess to be successful. In soccer, the ability to accelerate faster than your opponent can result in being first to reach a ball on a breakaway or stopping a counter attack. A unique way to train explosive movements is to evoke postactivation potentiation (PAP) in the working muscles. Traditionally, an overload stimulus with a long rest period is used, but a model utilizing an overspeed stimulus with shorter rest periods is less understood. Therefore, the purpose of this study was to determine the acute effects of varied rest intervals following assisted sprinting on bodyweight sprint time...
October 6, 2016: Journal of Strength and Conditioning Research
Hsuan Su, Nai-Jen Chang, Wen-Lan Wu, Lan-Yuen Guo, I-Hua Chu
CONTEXT: Foam rolling has been proposed to improve muscle function, performance, and joint range of motion (ROM). However, whether a foam rolling protocol can be adopted as a warm-up to improve flexibility and muscle strength is unclear. OBJECTIVE: To examine and compare the acute effects of foam rolling, static stretching, and dynamic stretching used as part of warm-up on flexibility and muscle strength of knee flexion and extension. DESIGN: Crossover study...
October 13, 2016: Journal of Sport Rehabilitation
Gert Ulrich, Mario Parstorfer
PURPOSE: There is limited data on postactivation potentiation (PAP) effects following plyometric conditioning contractions (CC), especially in the upper body. Therefore, the study compared plyometric CC with concentric-eccentric and eccentric CC aiming to improve upper body power performance due to a PAP-effect. METHODS: Sixteen resistance-trained males completed three experimental trials in a randomized order which composed of either a plyometric (PLY), a concentric-eccentric (CON) or an eccentric-only (ECC) CC...
October 13, 2016: International Journal of Sports Physiology and Performance
Sander P M Ganzevles, Arnold de Haan, Peter J Beek, Hein A M Daanen, Martin J Truijens
For training to be optimal, daily training load has to be adapted to the momentary status of the individual athlete, which is often difficult to establish. Therefore, the present study was performed to investigate the predictive value of heart rate recovery (HRR) during a standardized warm-up for training load. Training load was quantified by the variation in heart rate during standardized training in competitive swimmers. Eight female and five male swimmers of Dutch national level participated in the study...
October 13, 2016: International Journal of Sports Physiology and Performance
Ben Buse, Stuart Kearns, Charles Clapham, Donovan Hawley
A prototype Peltier thermoelectric cooling unit has been constructed to cool a cold finger on an electron microprobe. The Peltier unit was tested at 15 and 96 W, achieving cold finger temperatures of -10 and -27°C, respectively. The Peltier unit did not adversely affect the analytical stability of the instrument. Heat conduction between the Peltier unit mounted outside the vacuum and the cold finger was found to be very efficient. Under Peltier cooling, the vacuum improvement associated with water vapor deposition was not achieved; this has the advantage of avoiding severe degradation of the vacuum observed when warming up a cold finger from liquid nitrogen (LN2) temperatures...
October 5, 2016: Microscopy and Microanalysis
Ann Sofia Skou Thomsen, Phillip Smith, Yousif Subhi, Morten la Cour, Lilian Tang, George M Saleh, Lars Konge
PURPOSE: To investigate the correlation in performance of cataract surgery between a virtual-reality simulator and real-life surgery using two objective assessment tools with evidence of validity. METHODS: Cataract surgeons with varying levels of experience were included in the study. All participants performed and videorecorded three standard cataract surgeries before completing a proficiency-based test on the EyeSi virtual-reality simulator. Standard cataract surgeries were defined as: (1) surgery performed under local anaesthesia, (2) patient age >60 years, and (3) visual acuity >1/60 preoperatively...
September 29, 2016: Acta Ophthalmologica
Ccg Chen, E Tanner, A Malpani, S S Vedula, A N Fader, S A Scheib, I C Green, G D Hager
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
J Kroft, M Ordon, L Po, N Zwingerman, J Y Lee, R Pittini
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
Imen Fekhfekh, Abdelmoneem Yahia, Mokhtar Chaabene, Salma Jribi, Nizar Suissi, Mohamed Habib Elleuch, Sameh Ghroubi
OBJECTIVE: To study the acute effect of static and dynamic stretching on the knee muscle strength and postural capacity in athletes. PATIENTS AND METHODS: Fifteen judokas performed 2 stretching protocols (static and dynamic) on the muscles of both lower limbs with an interval of 48hours in a random order. An evaluation of the dominant knee muscle strength with an isokinetic dynamometer CybexNormII was performed before and after each stretching protocol in a concentric mode at a speed of 60 and 180°/s...
September 2016: Annals of Physical and Rehabilitation Medicine
Harry G Banyard, Kazunori Nosaka, G Gregory Haff
This study investigated the reliability and validity of the load-velocity relationship to predict the free-weight back squat 1RM. Seventeen strength-trained males performed three 1RM assessments on three separate days. All repetitions were performed to full depth with maximal concentric effort. Predicted 1RMs were calculated by entering the mean concentric velocity of the 1RM (V1RM) into an individualized linear regression equation, which was derived from the load-velocity relationship of three (20, 40, 60% of 1RM), four (20, 40, 60, 80% of 1RM), or five (20, 40, 60, 80, 90% of 1RM) incremental warm-up sets...
September 21, 2016: Journal of Strength and Conditioning Research
Catriona M Adams, Jeremiah J Peiffer
OBJECTIVES: Research is equivocal regarding endurance performance benefits of external nasal dilators, and currently research focusing on internal nasal dilators is non-existent. Both devices are used within competitive cycling. This study examined the influence of external and internal nasal dilation on cycling economy of motion and 20-km time trial performance. DESIGN: The study utilized a randomized, counterbalanced cross-over design. METHODS: Fifteen trained cyclists completed three exercise sessions consisting of a 15min standardized warm up and 20-km cycling time trial while wearing either a Breathe Right(®) external nasal dilator, Turbine(®) internal nasal dilator or no device (control)...
September 1, 2016: Journal of Science and Medicine in Sport
Michael C Zourdos, Caleb D Bazyler, Edward Jo, Andy V Khamoui, Bong-Sup Park, Sang-Rok Lee, Lynn B Panton, Jeong-Su Kim
PURPOSE: The purpose of this investigation was to examine the effects of a submaximal running warm-up on running performance in male endurance athletes (n = 16, Mage = 21 ± 2 years, MVO2max = 69.3 ± 5.1 mL/kg/min). METHOD: Endurance performance was determined by a 30-min distance trial after control and submaximal running warm-up conditions in a randomized crossover fashion. The warm-up began with 5 min of quiet sitting, followed by 6 min of submaximal running split into 2-min intervals at speeds corresponding to 45%, 55%, and 65% maximal oxygen consumption (VO2max)...
September 16, 2016: Research Quarterly for Exercise and Sport
Mohammad Reza Pourahmadi, Morteza Taghipour, Elham Jannati, Mohammad Ali Mohseni-Bandpei, Ismail Ebrahimi Takamjani, Fatemeh Rajabzadeh
BACKGROUND: Measurement of lumbar spine range of motion (ROM) is often considered to be an essential component of lumbar spine physiotherapy and orthopedic assessment. The measurement can be carried out through various instruments such as inclinometers, goniometers, and etc. Recent smartphones have been equipped with accelerometers and magnetometers, which, through specific software applications (apps) can be used for inclinometric functions. PURPOSE: The main purpose was to investigate the reliability and validity of an iPhone(®) app (TiltMeter(©) -advanced level and inclinometer) for measuring standing lumbar spine flexion-extension ROM in asymptomatic subjects...
2016: PeerJ
Jamie Suki Chang
To understand health, research needs to move outside of controlled research settings into the environments where health activities occur-homes, streets, and neighborhoods. I offer the docent method as a qualitative place-based approach for exploring health in a participant-driven, structured, and flexible way. The docent method is a participant-led, audiotaped, and photographed walking interview through broad "sites of interest" (SOIs). It is rooted in grounded theory and influenced by community-based participatory research and walking interviews...
September 14, 2016: Qualitative Health Research
T W Pike, S Pathak, F Mushtaq, R M Wilkie, M Mon-Williams, J P A Lodge
BACKGROUND: Recent evidence indicates that a preoperative warm-up is a potentially useful tool in facilitating performance. But what factors drive such improvements and how should a warm-up be implemented? METHODS: In order to address these issues, we adopted a two-pronged approach: (1) we conducted a systematic review of the literature to identify existing studies utilising preoperative simulation techniques; (2) we performed task analysis to identify the constituent parts of effective warm-ups...
September 15, 2016: Surgical Endoscopy
Masatoshi Nakamura, Tome Ikezoe, Hiroki Umegaki, Takuya Kobayashi, Satoru Nishishita, Noriaki Ichihashi
CONTEXT: Static Stretching (SS) is commonly performed within a warm-up routine to increase the range of motion (ROM) of a joint and to decrease muscle stiffness. However, the time course of changes in ankle dorsiflexion (DF) ROM and muscle stiffness during a routine SS program is unclear. OBJECTIVE: The present study investigated changes in ankle DF ROM, passive torque at DF ROM, and muscle stiffness during a routine SS program performed three times weekly for 4 weeks...
August 24, 2016: Journal of Sport Rehabilitation
Courtney J McGowan, David B Pyne, Kevin G Thompson, John S Raglin, Mark Osborne, Ben Rattray
This study investigated the effect of completing additional warm-up strategies in the transition phase between the pool warm up and the start of a race on elite sprint swimming performance. Twenty-five elite swimmers (12 men, 20 ± 3 years; 13 women, 20 ± 2 years, performance standard ~807 FINA2014 points) completed a standardised pool warm up followed by a 30-min transition phase and a 100-m freestyle time trial. During the transition phase, swimmers wore a tracksuit jacket with integrated heating elements and performed a dry land-based exercise routine (Combo), or a conventional tracksuit and remained seated (Control)...
September 15, 2016: Journal of Sports Sciences
F Aigner, M Biebl, A Fürst, T Jöns, J Pratschke, W Kneist
BACKGROUND: In recent years the video endoscopy-assisted transanal approach to total mesorectal excision (TME) combined with the conventional laparoscopic technique was developed as an alternative indication for treatment of low rectal cancer (TaTME). OBJECTIVE: The concept and results of the first German TaTME hands-on cadaver course with subsequent live surgery are presented. MATERIAL AND METHODS: The 2‑day training course was structured into an anatomical and a clinical surgery part...
September 15, 2016: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
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