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https://www.readbyqxmd.com/read/27194616/a-new-jump-landing-protocol-identifies-differences-in-healthy-coper-and-unstable-ankles-in-collegiate-athletes
#1
Kathy Liu, Caitlin Dierkes, Logan Blair
Ankle sprains are the most common injury in sport. With stability being an important risk factor for ankle sprains, a jump-landing protocol that can elicit differences in time-to-stabilisation (TTS) is necessary. The objective of this study was to develop a jump-landing protocol that could identify differences in TTS among healthy, 'coper', and unstable ankles of high-level athletes. 61 Division I collegiate athletes (32 females, 29 males; age: 19.9 ± 1.2 years; height: 176.6 ± 9.5 cm; mass: 74.3 ± 10...
September 2016: Sports Biomechanics
https://www.readbyqxmd.com/read/27075641/consistency-of-field-based-measures-of-neuromuscular-control-using-force-plate-diagnostics-in-elite-male-youth-soccer-players
#2
Paul J Read, Jon L Oliver, Mark Ba De Ste Croix, Gregory D Myer, Rhodri S Lloyd
Read, P, Oliver, JL, Croix, MD, Myer, GD, and Lloyd, RS. Consistency of field-based measures of neuromuscular control using force-plate diagnostics in elite male youth soccer players. J Strength Cond Res 30(12): 3304-3311, 2016-Deficits in neuromuscular control during movement patterns such as landing are suggested pathomechanics that underlie sport-related injury. A common mode of assessment is measurement of landing forces during jumping tasks; however, these measures have been used less frequently in male youth soccer players, and reliability data are sparse...
December 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26067161/altered-visual-focus-on-sensorimotor-control-in-people-with-chronic-ankle-instability
#3
Masafumi Terada, Lindsay M Ball, Brian G Pietrosimone, Phillip A Gribble
The purpose of this investigation was to examine the effects of the combination of chronic ankle instability (CAI) and altered visual focus on strategies for dynamic stability during a drop-jump task. Nineteen participants with self-reported CAI and 19 healthy participants performed a drop-jump task in looking-up and looking-down conditions. For the looking-up condition, participants looked up and read a random number that flashed on a computer monitor. For the looking-down condition, participants focused their vision on the force plate...
2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/26063526/on-the-establishment-persistence-and-inevitable-extinction-of-populations
#4
Kais Hamza, Peter Jagers, Fima C Klebaner
Comprehensive models of stochastic, clonally reproducing populations are defined in terms of general branching processes, allowing birth during maternal life, as for higher organisms, or by splitting, as in cell division. The populations are assumed to start small, by mutation or immigration, reproduce supercritically while smaller than the habitat carrying capacity but subcritically above it. Such populations establish themselves with a probability wellknown from branching process theory. Once established, they grow up to a band around the carrying capacity in a time that is logarithmic in the latter, assumed large...
March 2016: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/24479729/health-services-changes-is-a-run-in-period-necessary-before-evaluation-in-randomised-clinical-trials
#5
RANDOMIZED CONTROLLED TRIAL
Trishna Rathod, John Belcher, Alan A Montgomery, Chris Salisbury, Nadine E Foster
BACKGROUND: Most randomised clinical trials (RCTs) testing a new health service do not allow a run-in period of consolidation before evaluating the new approach. Consequently, health professionals involved may feel insufficiently familiar or confident, or that new processes or systems that are integral to the service are insufficiently embedded in routine care prior to definitive evaluation in a RCT. This study aimed to determine the optimal run-in period for a new physiotherapy-led telephone assessment and treatment service known as PhysioDirect and whether a run-in was needed prior to evaluating outcomes in an RCT...
January 30, 2014: Trials
https://www.readbyqxmd.com/read/24479611/landing-ground-reaction-forces-in-figure-skaters-and-non-skaters
#6
COMPARATIVE STUDY
Nathan W Saunders, Nicholas Hanson, Panos Koutakis, Ajit M Chaudhari, Steven T Devor
Researchers and clinicians have suggested that overuse injuries to the lower back and lower extremities of figure skaters may be associated with the repeated high impact forces sustained during jump landings. Our primary aim was to compare the vertical ground reaction forces (GRFs) in freestyle figure skaters (n = 26) and non-skaters (n = 18) for the same barefoot single leg landing on a force plate from a 20 cm platform. Compared with non-skaters, skaters exhibited a significantly greater normalised peak GRF (3...
2014: Journal of Sports Sciences
https://www.readbyqxmd.com/read/23875624/time-to-stabilisation-of-the-cervical-spine-when-supported-by-a-pillow-in-side-lying
#7
Jennifer B Hodkinson, Susan J Gordon, Robert G Crowther, Petra G Buettner
UNLABELLED: Currently, there is little information to guide consumers, retailers and health professionals about the length of time it takes for the cervical spine to stabilise when resting on a pillow. The aim of this study was to determine the time required to achieve stabilisation of the cervical spine when supported by a polyester pillow and innerspring mattress in side lying. Twenty-four asymptomatic females rested in a standardised side lying position during the capture of 3D data from markers placed over cervical landmarks...
2013: Ergonomics
https://www.readbyqxmd.com/read/23855764/physiological-and-performance-responses-to-the-fifa-11-part-2-a-randomised-controlled-trial-on-the-training-effects
#8
RANDOMIZED CONTROLLED TRIAL
Franco M Impellizzeri, Mario Bizzini, Jiri Dvorak, Barbara Pellegrini, Federico Schena, Astrid Junge
The aim of this study was to examine the training effects of an injury prevention programme on neuromuscular control, strength and performance in male amateur football players. Eighty-one players were allocated to the "FIFA 11+" (n = 42) or a control group (CON, n = 39). The "FIFA 11+" group performed the programme 3 times a week for 9 weeks; the control group completed the usual warm-up. Primary outcomes were: time-to-stabilisation test and eccentric/concentric flexors strength. Secondary outcomes were: eccentric/concentric extensors strength, star excursion balance test, core-stability test, vertical jump, sprint, and agility...
2013: Journal of Sports Sciences
https://www.readbyqxmd.com/read/23351015/dynamic-postural-stability-for-double-leg-drop-landing
#9
Wenxin Niu, Ming Zhang, Yubo Fan, Qinping Zhao
Abstract Dynamic postural stability has been widely studied for single-leg landing, but seldom considered for double-leg landing. This study aimed to evaluate the dynamic postural stability and the influence mechanism of muscle activities during double-leg drop landing. Eight recreationally active males and eight recreationally active females participated in this study and dropped individually from three heights (0.32 m, 0.52 m, and 0.72 m). Ground reaction force was recorded to calculate the time to stabilisation...
June 2013: Journal of Sports Sciences
https://www.readbyqxmd.com/read/22894146/does-whole-body-vibration-training-affect-knee-kinematics-and-neuromuscular-control-in-healthy-people
#10
Borja Sañudo, Adrian Feria, Luis Carrasco, Moisés de Hoyo, Rui Santos, Hugo Gamboa
This study aimed to investigate the effect of whole body vibration (WBV) training on the knee kinematics and neuromuscular control after single-legged drop landings. Surface electromyographic (EMG) activity of the rectus femoris and hamstring muscles and knee and ankle accelerometry signals were acquired from 42 healthy volunteers. Participants performed three pre-test landings and after a recovery period of three minutes, they completed one set of six bouts of WBV each of one minute duration (30 Hz - 4 mm), followed by a single-leg drop landing...
2012: Journal of Sports Sciences
https://www.readbyqxmd.com/read/21764228/skin-conductance-measurements-as-pain-assessment-in-newborn-infants-born-at-22-27-weeks-gestational-age-at-different-postnatal-age
#11
Josanne Munsters, Linda Wallström, Johan Agren, Torgny Norsted, Richard Sindelar
BACKGROUND: To assess pain or stress in newborn infants submitted to intensive care is important but difficult, as different observational pain scales are not always reliable in premature infants. As an indicator of pain, skin conductance (SC) measurements have detected increased sweating in newborn infants >28 gestational age (GA) submitted to heel lancing. OBJECTIVE: To measure SC during heel lancing and routine care in newborn infants, born at 22 to 27 GA, with special relation to postnatal age (PNA)...
January 2012: Early Human Development
https://www.readbyqxmd.com/read/21257670/characteristics-of-people-with-recurrent-ankle-sprains-a-systematic-review-with-meta-analysis
#12
REVIEW
Claire E Hiller, Elizabeth J Nightingale, Chung-Wei Christine Lin, Garrett F Coughlan, Brian Caulfield, Eamonn Delahunt
OBJECTIVE: To examine whether people with recurrent ankle sprain, have specific physical and sensorimotor deficits. DESIGN: A systematic review of journal articles in English using electronic databases to September 2009. Included articles compared physical or sensorimotor measures in people with recurrent (≥2) ankle sprains and uninjured controls. MAIN OUTCOME GROUPS: Outcome measures were grouped into: physical characteristics, strength, postural stability, proprioception, response to perturbation, biomechanics and functional tests...
June 2011: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/21221991/low-level-taekwondo-practitioners-have-better-somatosensory-organisation-in-standing-balance-than-sedentary-people
#13
Hio-Teng Leong, Siu N Fu, Gabriel Y F Ng, William W N Tsang
Sports training, especially for those requiring fast and skilled movements have been reported to improve one's postural control, but the underlying sensory integration mechanism is unknown. The purpose is to explore the sensory organisation strategies for maintaining standing balance in Taekwondo practitioners, and to examine the quasi-static and dynamic balance performance in subjects with and without TKD training. Case-control study was used as a study design. Eleven subjects with low level of Taekwondo training for 1-3 years, and eleven sedentary healthy subjects were assessed with the sensory organisation tests (SOT) under six visual and somatosensory input conditions and their balance upon landing from self- or operator-triggered drop test with the eyes closed condition...
August 2011: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/19442581/evidence-of-sensorimotor-deficits-in-functional-ankle-instability-a-systematic-review-with-meta-analysis
#14
REVIEW
Joanne Munn, S John Sullivan, Anthony G Schneiders
Functional ankle instability (FAI) has been associated with impaired sensorimotor function; however individual studies have produced conflicting results. In an attempt to reduce this ambiguity, a systematic review with meta-analysis was undertaken to determine which sensorimotor deficits exist with FAI. Fifty-three studies assessing sensorimotor factors in subjects with FAI were included from 465 identified articles. Studies were rated for methodological quality and data were pooled for peroneal reaction time, joint position sense, and postural sway during single-leg stance and time to stabilisation from a single-leg jump...
January 2010: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/19083720/landing-stability-in-anterior-cruciate-ligament-deficient-versus-healthy-individuals-a-motor-control-approach
#15
COMPARATIVE STUDY
N Phillips, R W van Deursen
OBJECTIVES: To compare the temporal effectiveness of landing strategies in anterior cruciate ligament deficient (ACLD) versus non-injured participants, when they landed on one leg after running or after a single leg hop. DESIGN: Case control study. SETTING: Laboratory setting. PARTICIPANTS: Participants were 30 ACLD patients and 30 control subjects. MAIN OUTCOME MEASURES: Time to stabilise (TTS) was measured using centre of pressure (COP), horizontal (Fy) and vertical (Fz) force velocity on a Kistler forceplate...
November 2008: Physical Therapy in Sport
https://www.readbyqxmd.com/read/15533026/speed-of-initial-atropinisation-in-significant-organophosphorus-pesticide-poisoning-a-systematic-comparison-of-recommended-regimens
#16
COMPARATIVE STUDY
Michael Eddleston, Nick A Buckley, Helaina Checketts, Lalith Senarathna, Fahim Mohamed, M H Rezvi Sheriff, Andrew Dawson
OBJECTIVE: Early deaths from organophosphorus (OP) pesticide self-poisoning result from respiratory failure and cardiovascular collapse. Therapy requires the urgent use of atropine to reverse cholinergic excess, thereby improving respiratory function, heart rate, and blood pressure. We aimed to assess variation in textbook recommendations for early atropinisation and to see whether this variation affected time to stabilisation using model data from 22 severely poisoned patients seen in a Sri Lankan clinical trial...
2004: Journal of Toxicology. Clinical Toxicology
https://www.readbyqxmd.com/read/12195981/investigation-into-the-origin-of-the-noise-of-surface-electrodes
#17
E Huigen, A Peper, C A Grimbergen
In the recording of biomedical signals, a significant noise component is introduced by the electrode. The magnitude of this noise is considerably higher than the equivalent thermal noise from the electrode impedance. As the noise in surface electrodes limits the resolution of biopotential recordings, it is important to understand its origin. It was found that the noise mainly originates in the electrolyte-skin interface and that it is highly dependent on the electrode gel used and the skin properties of the test subject...
May 2002: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/6547902/-antibody-controlled-cytostatic-therapy-of-malignant-thymoma-with-concomitant-myasthenia-gravis
#18
F Schumm, A Brinkmann, A Fateh-Moghadam
In a 46-year-old female patient with malignant thymoma and concomitant myasthenia gravis relapse with gravitational metastases occurred 6 1/2 years after the first operation. Metastases could be removed surgically only partially and were subsequently irradiated with 50 Gy. After 3 1/2 years renewed metastatic growth occurred. Until then the concomitant myasthenia had been stable during treatment with pyridostigmine and azathioprin and intermittent prednisone; acetylcholine receptor antibody titres had remained largely stable...
August 17, 1984: Deutsche Medizinische Wochenschrift
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