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https://www.readbyqxmd.com/read/28328719/predicting-the-maximum-dynamic-strength-in-bench-press-the-high-precision-of-the-bar-velocity-approach
#1
Irineu Loturco, Ronaldo Kobal, José E Moraes, Katia Kitamura, César C Cal Abad, Lucas A Pereira, Fábio Y Nakamura
Loturco, I, Kobal, R, Moraes, JE, Kitamura, K, Cal Abad, CC, Pereira, LA, and Nakamura, FY. Predicting the maximum dynamic strength in bench press: the high precision of the bar velocity approach. J Strength Cond Res 31(4): 1127-1131, 2017-The aim of this study was to determine the force-velocity relationship and test the possibility of determining the 1 repetition maximum (1RM) in "free weight" and Smith machine bench presses. Thirty-six male top-level athletes from 3 different sports were submitted to a standardized 1RM bench press assessment (free weight or Smith machine, in randomized order), following standard procedures encompassing lifts performed at 40-100% of 1RM...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28320491/the-effect-of-rider-weight-and-additional-weight-in-icelandic-horses-in-t%C3%A3-lt-part-ii-stride-parameters-responses
#2
V Gunnarsson, G J Stefánsdóttir, A Jansson, L Roepstorff
This study investigated the effects of rider weight in the BW ratio (BWR) range common for Icelandic horses (20% to 35%), on stride parameters in tölt in Icelandic horses. The kinematics of eight experienced Icelandic school horses were measured during an incremental exercise test using a high-speed camera (300 frames/s). Each horse performed five phases (642 m each) in tölt at a BWR between rider (including saddle) and horse starting at 20% (BWR20) and increasing to 25% (BWR25), 30% (BWR30), 35% (BWR35) and finally 20% (BWR20b) was repeated...
March 21, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28320364/the-weight-of-pupils-schoolbags-in-early-school-age-and-its-influence-on-body-posture
#3
Anna Brzęk, Tarja Dworrak, Markus Strauss, Fabian Sanchis-Gomar, Ibtissam Sabbah, Birgit Dworrak, Roman Leischik
BACKGROUND: Postural development progresses through a series of stages (growth spurts, development of balance and coordination, postural stability) which occur when children are at school age. The reduction in the level of physical activity, increased body weight, overloaded school bags, asymmetry of the backpack straps, the method of putting on and taking off the backpacks and increased usage of electronic devices have negative side effects such as bad body posture habits. METHODS: A prospective cohort study in the group of 155 pupils at early school age 7-9 years old has been conducted...
March 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28319685/linking-actions-and-objects-context-specific-learning-of-novel-weight-priors
#4
Kevin M Trewartha, J Randall Flanagan
Distinct explicit and implicit memory processes support weight predictions used when lifting objects and making perceptual judgments about weight, respectively. The first time that an object is encountered weight is predicted on the basis of learned associations, or priors, linking size and material to weight. A fundamental question is whether the brain maintains a single, global representation of priors, or multiple representations that can be updated in a context specific way. A second key question is whether the updating of priors, or the ability to scale lifting forces when repeatedly lifting unusually weighted objects requires focused attention...
March 17, 2017: Cognition
https://www.readbyqxmd.com/read/28290757/hip-musculoskeletal-conditions-and-associated-factors-that-influence-squat-performance-a-systematic-review
#5
Scott W Cheatham, Kyle R Stull, Mike Fantigrassi, Ian Montel
CONTEXT: The squat is a fundamental movement for weight lifting and sports performance. Both unilateral and bilateral squats are also used to assess transitional and dynamic lower extremity control. Common lower extremity conditions can have an influence on squat performance. Of interest, are the effects of hip musculoskeletal conditions and associated factors such as hip muscle pain, fatigue, and tightness on squat performance. Currently, there has been no appraisal of the evidence regarding the association of these conditions and associated factors on squat performance...
March 14, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28269488/influence-of-force-feedback-on-grasp-force-modulation-in-prosthetic-applications-a-preliminary-study
#6
Sasha B Godfrey, Matteo Bianchi, Antonio Bicchi, Marco Santello
In typical movement, humans use a combination of feed-forward and feedback motor control strategies to interact with the world around them. However, when sensory input is impaired or absent, as in the case of various neuropathies or amputation, the ability to perform everyday tasks, like modulating grip force to object weight, can be affected. In this study, we show the results of a preliminary study using a pressure cuff-like force feedback device (CUFF) with the SoftHand Pro (SHP) prosthetic hand. Subjects lifted an object of various weights using their own hand, with the SHP without feedback, and the SHP with force feedback...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28259558/patient-satisfaction-body-image-and-quality-of-life-after-lower-body-lift-a-prospective-pre-and-postoperative-long-term-survey
#7
Martin F Vierhapper, Anna Pittermann, Stefan Hacker, Hugo B Kitzinger
BACKGROUND: Body contouring surgery after massive weight loss remains a fast growing field due to the rising number of postbariatric surgery patients, and it can improve patients' quality of life substantially. Patient expectations in these procedures are very high, but only little is known as to whether these procedures have a long lasting influence on body image, patient satisfaction, and quality of life. SETTING: University hospital, Austria. METHODS: We evaluated 40 consecutive female patients who underwent a lower body lift between 2009 and 2013...
January 11, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28254507/primary-somatosensory-cortex-necessary-for-the-perception-of-weight-from-other-people-s-action-a-continuous-theta-burst-tms-experiment
#8
Nikola Valchev, Emmanuele Tidoni, Antonia F de C Hamilton, Valeria Gazzola, Alessio Avenanti
The presence of a network of areas in the parietal and premotor cortices, which are active both during action execution and observation, suggests that we might understand the actions of other people by activating those motor programs for making similar actions. Although neurophysiological and imaging studies show an involvement of the somatosensory cortex (SI) during action observation and execution, it is unclear whether SI is essential for understanding the somatosensory aspects of observed actions. To address this issue, we used off-line transcranial magnetic continuous theta-burst stimulation (cTBS) just before a weight judgment task...
February 28, 2017: NeuroImage
https://www.readbyqxmd.com/read/28251064/neuromuscular-trunk-activation-patterns-in-back-pain-patients-during-one-handed-lifting
#9
Juliane Mueller, Tilman Engel, Stephan Kopinski, Frank Mayer, Steffen Mueller
AIM: To analyze neuromuscular activity patterns of the trunk in healthy controls (H) and back pain patients (BPP) during one-handed lifting of light to heavy loads. METHODS: After assessment of back pain (graded chronic pain scale according to von Korff) all subjects (n = 43) performed a warm-up (treadmill walking). Next, subjects were instructed to lift 3 × a 20 kg weight placed in front of them (with both hand) onto a table (height: 0.75 m). Subsequently, all subjects lifted with one hand (left-side, 3 repetitions) a weight of 1 kg (light), 10 kg (middle) and 20 kg (heavy) in random order from the ground up onto the table left of them...
February 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28248962/an-engineered-human-conjunctival-like-tissue-to-study-ocular-surface-inflammatory-diseases
#10
Laura García-Posadas, Laura Soriano-Romaní, Antonio López-García, Yolanda Diebold
The aim of this study was to develop a three-dimensional model of the human conjunctiva that can be used to perform physiology and pathophysiology experiments. Fibrin-based matrices (derived from human plasma or plasma cryoprecipitate) were used as scaffolds, and primary cells were obtained from conjunctival tissue. Conjunctival constructs were analyzed by immunofluorescent staining and scanning electron microscopy and cell proliferation was measured with alamarBlue® assay. After characterizing the constructs, four different experimental conditions were analyzed in cryoprecipitate matrices: controls, air-lifted cultures (to increase cell stratification), partially desiccated cultures (to mimic dry eye disease), and IL-13-treated cultures (to mimic allergy)...
2017: PloS One
https://www.readbyqxmd.com/read/28247104/acute-type-a-aortic-dissection-associated-with-a-sporting-activity
#11
Ryo Itagaki, Naoyuki Kimura, Satoshi Itoh, Atsushi Yamaguchi, Hideo Adachi
PURPOSE: To investigate the clinical characteristics of acute type A aortic dissection (ATAAD) occurring during a sporting activity. METHODS: The subjects of this study were 615 patients who underwent surgery for ATAAD between 1990 and 2015. The patients were divided into two groups according to whether the ATAAD was associated with a sporting activity (sports group: n = 25, mean age 62.3 years; non-sports group: n = 590, mean age 63.7 years). Specific activity was assessed in the sports group, and the characteristics and outcomes were compared between the groups...
February 28, 2017: Surgery Today
https://www.readbyqxmd.com/read/28242815/muscle-and-liver-glycogen-utilization-during-prolonged-lift-and-carry-exercise-male-and-female-responses
#12
Thomas B Price, Kimberly Sanders
This study examined the use of carbohydrates by men and women during lift/carry exercise. Effects of menstrual cycle variation were examined in women. Twenty-five subjects (15 M, 10 F) were studied; age 25 ± 2y M, 26 ± 3y F, weight 85 ± 3 kg* M, 63 ± 3 kg F, and height 181 ± 2 cm* M, 161 ± 2 cm F (* P < 0.0001). During exercise subjects squatted to floor level and lifted a 30 kg box, carried it 3 m, and placed it on a shelf 132 cm high 3X/min over a 3-hour period (540 lifts) or until they could not continue...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28237075/rasch-analysis-indicates-that-the-simple-shoulder-test-is-robust-but-minor-item-modifications-and-attention-to-gender-differences-should-be-considered
#13
Jayaprakash Raman, Joy C MacDermid, David Walton, George S Athwal
STUDY DESIGN: Repeated cross-sectional study. INTRODUCTION: Multiple studies have evaluated the psychometric properties of the Simple Shoulder Test (SST) through traditional methods supporting it as valid and reliable. Since the evidentiary pool supporting the use of the SST has only partially addressed key measurement properties and the development of SST pre-dates the common use of Rasch model, validation of SST has become a necessity to establish as a reliable and valid PRO for shoulder conditions...
February 22, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/28227740/influence-of-force-feedback-on-grasp-force-modulation-in-prosthetic-applications-a-preliminary-study
#14
Sasha B Godfrey, Matteo Bianchi, Antonio Bicchi, Marco Santello, Sasha B Godfrey, Matteo Bianchi, Antonio Bicchi, Marco Santello, Marco Santello, Antonio Bicchi, Sasha B Godfrey, Matteo Bianchi
In typical movement, humans use a combination of feed-forward and feedback motor control strategies to interact with the world around them. However, when sensory input is impaired or absent, as in the case of various neuropathies or amputation, the ability to perform everyday tasks, like modulating grip force to object weight, can be affected. In this study, we show the results of a preliminary study using a pressure cuff-like force feedback device (CUFF) with the SoftHand Pro (SHP) prosthetic hand. Subjects lifted an object of various weights using their own hand, with the SHP without feedback, and the SHP with force feedback...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28205508/global-dynamics-of-non-equilibrium-gliding-in-animals
#15
Isaac Yeaton, Jake Socha, Shane Ross
Gliding flight - moving horizontally downward through the air without power - has evolved in a broad diversity of taxa and serves numerous ecologically relevant functions such as predator escape, expanding foraging locations, and finding mates, and has been suggested as an evolutionary pathway to powered flight. Historically, gliding has been conceptualized using the idealized conditions of equilibrium, in which the net aerodynamic force on the glider balances its weight. While this assumption is appealing for its simplicity, recent studies of glide trajectories have shown that equilibrium gliding is not the norm for most species...
February 16, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28192127/long-term-treatment-with-nandrolone-decanoate-impairs-mesenteric-vascular-relaxation-in-both-sedentary-and-exercised-female-rats
#16
Izabela F Caliman, Cristian S Bernabe, Antônio F de Melo, Girlândia A Brasil, Andrews M do Nascimento, Ewelyne M de Lima, Suely G Figueiredo, Tadeu U de Andrade, Nazaré S Bissoli
Nandrolone Decanoate (ND) is an Anabolic Androgenic Steroid (AAS) that under abusive regimen can lead to multiple physiological adverse effects. Studies of AAS-mediated cardiovascular (CV) alterations were mostly taken from male subjects, even though women are also susceptible to the effects of AAS and gender-specific differences in susceptibility to vascular diseases exist. Here we investigate ND-induced vascular reactivity alterations in both sedentary and exercised female rats and whether these alterations depend on endothelium-derived factors...
April 2017: Steroids
https://www.readbyqxmd.com/read/28182514/assessment-of-impact-and-recovery-needs-in-communities-affected-by-the-elk-river-chemical-spill-west-virginia-april-2014
#17
Sherry L Burrer, Ethan Fechter-Leggett, Tesfaye Bayleyegn, Miguella Mark-Carew, Carrie Thomas, Danae Bixler, Rebecca S Noe, Joy Hsu, Loretta Haddy, Amy Wolkin
OBJECTIVES: In January 2014, 4-methylcyclohexanemethanol spilled into the Elk River near Charleston, West Virginia, contaminating the water supply for about 120 000 households. The West Virginia American Water Company (WVAWC) issued a "do not use" water order for 9 counties. After the order was lifted (10 days after the spill), the communities' use of public water systems, information sources, alternative sources of water, and perceived impact of the spill on households were unclear to public health officials...
March 2017: Public Health Reports
https://www.readbyqxmd.com/read/28182500/validity-of-various-methods-for-determining-velocity-force-and-power-in-the-back-squat
#18
Harry G Banyard, Ken Nosaka, Kimitake Sato, G Gregory Haff
PURPOSE: This investigation examined the validity of two kinematic systems for assessing mean velocity (MV), peak velocity (PV), mean force (MF), peak force (PF), mean power (MP), and peak power (PP) during the full depth free-weight back squat performed with maximal concentric effort. METHODS: Ten strength-trained men (26.1±3.0 y; 1.81±0.07 m; 82.0±10.6 kg) performed three 1-repetition maximum (1RM) trials on three separate days, encompassing lifts performed at six relative intensities including 20, 40, 60, 80, 90, and 100% of 1RM...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28169153/effects-of-light-load-maximal-lifting-velocity-weight-training-vs-combined-weight-training-and-plyometrics-on-sprint-vertical-jump-and-strength-performance-in-adult-soccer-players
#19
David Rodríguez-Rosell, Julio Torres-Torrelo, Felipe Franco-Márquez, José Manuel González-Suárez, Juan José González-Badillo
OBJECTIVES: The purpose of this study was to compare the effects of combined light-load maximal lifting velocity weight training (WT) and plyometric training (PT) with WT alone on strength, jump and sprint performance in semiprofessional soccer players. DESIGN: Experimental, pre-post tests measures. METHODS: Thirty adult soccer players were randomly assigned into three groups: WT alone (FSG, n=10), WT combined to jump and sprint exercises (COM, n=10) and control group (CG, n=10)...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28166186/between-session-reliability-of-isometric-mid-thigh-pull-kinetics-and-maximal-power-clean-performance-in-male-youth-soccer-players
#20
Thomas Dos'Santos, Christopher Thomas, Paul Comfort, John J McMahon, Paul A Jones, Nick P Oakley, Ashley L Young
The aim of the study was to determine the between-session reliability of isometric mid-thigh pull (IMTP) kinetics and maximal weight lifted during the power clean (PC) in male youth soccer players, and to identify the smallest detectable differences between sessions. Thirteen male youth soccer players (age: 16.7 ± 0.5 years, height: 1.80 ± 0.08 m, mass: 70.5 ± 9.4 kg) performed three IMTP trials, while only ten soccer players performed maximal power cleans. These were performed twice, separated by 48 hours to examine the between-session reliability...
February 1, 2017: Journal of Strength and Conditioning Research
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