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https://www.readbyqxmd.com/read/28717150/a-comparison-of-traditional-and-novel-metrics-to-quantify-resistance-training
#1
Kieran J Marston, Jeremiah J Peiffer, Michael J Newton, Brendan R Scott
Common estimates of external training intensity for resistance exercise do not incorporate inter-set recovery duration, and might not reflect the overall demands of training. This study aimed to assess novel metrics of exercise density (ED) during resistance exercise, and how these related to a physiological marker of internal training intensity as well as traditional measures of external training intensity and volume. Thirteen males and seven females performed two bouts of resistance exercise focused on developing strength (5 sets of 5 repetitions with 5-repetition maximum; 180 s recovery) and hypertrophy (3 sets of 10 repetitions with 10-repetition maximum; 60 s recovery)...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28699620/aerodynamics-and-flow-features-of-a-damselfly-in-takeoff-flight
#2
Ayodeji Toluwanimi Bode-Oke, Samane Zeyghami, Haibo Dong
Flight initiation is fundamental for survival, escape from predators and lifting payload from one place to another in biological fliers and can be broadly classified into jumping and non-jumping takeoffs. During jumping takeoffs, the legs generate most of the initial impulse. Whereas the wings generate most of the forces in non-jumping takeoffs, which are usually voluntary, slow, and stable. It is of great interest to understand how these non-jumping takeoffs occur and what strategies insects use to generate large amount of forces required for this highly demanding flight initiation mode...
July 12, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28696330/artificial-insect-wings-with-biomimetic-wing-morphology-and-mechanical-properties
#3
Zhiwei Liu, Xiaojun Yan, Mingjing Qi, Yangsheng Zhu, Dawei Huang, X Y Zhang, Liwei Lin
The pursuit of high lift force for insect-scale Flapping-wing Micro Aerial Vehicle (FMAV) requires its artificial wings to own biomimetic wing features which are close to its nature counterpart. In this work, we present both fabrication and testing methods for artificial insect wings with biomimetic wing morphology and mechanical properties. The artificial cicada (Hyalessa maculaticollis) wing is fabricated through high precision laser cutting technique and bonding process of multilayer materials. Through controlling the shape of wing venation, the fabrication method can achieve 3-D (three dimensional) wing architecture including cambers or corrugations...
July 11, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28695558/rehabilitation-in-patients-with-pulmonary-arterial-hypertension
#4
Stephan Keusch, Alexander Turk, Stéphanie Saxer, Nicola Ehlken, Ekkehard Grunig, Silvia Ulrich, On Behalf Of The Swiss Society Of Pulmonary Hypertension
Exertional dyspnoea is a leading symptom in patients with pulmonary arterial hypertension (PAH). Patients suffering from PAH report poor quality of life, have skeletal muscle dysfunction and in the absence of advanced medical therapy deteriorate progressively due to right heart failure which can lead to death. For decades, patients with PAH were advised to avoid exercise in fear of exacerbated right heart failure. Recently, it has been shown that a highly supervised rehabilitation programme in expert centres leads to significant improvements in symptoms, quality of life, exercise capacity and may even enhance haemodynamics in selected stable patients treated with advanced regimens of PAH-targeted drugs...
July 11, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28686081/letter-to-the-editor-concerning-the-article-bar-velocities-capable-of-optimising-the-muscle-power-in-strength-power-exercises-by-loturco-pereira-abad-tabares-moraes-kobal-kitamura-nakamura-2017
#5
Slobodan Jaric, Amador Garcia Ramos
Loturco and co-workers (2017) recently published data in the Journal of Sports Sciences to present the optimum loading magnitudes regarding the maximization of the "mean propulsive power" of the leg and arm muscles. Among the most important findings were that (1) the recorded power in the squat and squat jump exercises was markedly low, (2) the optimum external load that maximized the power in the same exercises was close to 100% of body weight, while (3) the ballistic bench press throw revealed smaller power than the regular bench press typically performed with relatively low level of muscle activation towards the end of the propulsive lifting phase...
July 7, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28682933/acute-capsaicin-supplementation-improves-resistance-training-performance-in-trained-men
#6
Marcelo Conrado de Freitas, Jason M Cholewa, Renan Valero Freire, Bruna Alves Carmo, Jefferson Bottan, Murilo Bratfich, Murilo Portari Della Bandeira, Daniela Caetano Gonçalves, Erico Chagas Caperuto, Fabio S Lira, Fabrício E Rossi
The purpose of this study was to investigate the acute effect of capsaicin supplementation on performance, rate of perceived exertion and blood lactate concentrations during resistance exercise in healthy trained young men. Ten resistance-trained men (age= 22.7±4.0 yrs, weight= 82.3±9.6 kg, height= 1.75±0.1 cm) completed two randomized, double-blind trials: Capsaicin condition (12mg) or a placebo condition. Forty five minutes after supplement consumption, subjects performed four sets until movement failure in the squat exercise at 70% of 1RM with 90 seconds of rest interval between sets...
July 3, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28682930/analysis-of-usa-powerlifting-federation-data-from-january-1-2012-june-11-2016
#7
Robert Ball, Drew Weidman
In this paper we report on 47,913 officially judged contestant results from powerlifting matches from January 1, 2012 - June 11, 2016 for the USA Powerlifting Federation.We found that age and sex to be the most complex factors in predicting powerlifting results. For women, in general, the younger the woman is, the more they can squat; the older the woman is the less they can squat. For men and women, with the one exception for women's squat, the peak age of lifting power is between the ages of 24-49, at which point lifting power slowly declines...
July 3, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28680897/high-prevalence-of-nontraumatic-shoulder-pain-in-a-regional-sample-of-female-high-school-volleyball-athletes
#8
Kayt E Frisch, Jacob Clark, Chad Hanson, Chris Fagerness, Adam Conway, Lindsay Hoogendoorn
BACKGROUND: Shoulder pain is becoming increasingly problematic in young players as volleyball gains popularity. Associations between repetitive motion and pain and overuse injury have been observed in other overhand sports (most notably baseball). Studies of adult athletes suggest that there is a shoulder pain and overuse problem present in volleyball players, but minimal research has been done to establish rates and causes in juvenile participants. PURPOSE: To establish rates of shoulder pain, regardless of whether it resulted in a loss of playing time, in female high school volleyball players...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28626906/behavioural-implications-of-traditional-treatment-and-closed-loop-automated-insulin-delivery-systems-in-type-1-diabetes-applying-a-cognitive-restraint-theory-framework
#9
REVIEW
A R Kahkoska, E J Mayer-Davis, K K Hood, D M Maahs, K S Burger
As the prevalence of obesity in Type 1 diabetes rises, the effects of emerging therapy options should be considered in the context of both weight and glycaemic control outcomes. Artificial pancreas device systems will 'close the loop' between blood glucose monitoring and automated insulin delivery and may transform day-to-day dietary management for people with Type 1 diabetes in multiple ways. In the present review, we draw directly from cognitive restraint theory to consider unintended impacts that closed-loop systems may have on ingestive behaviour and food intake...
June 19, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28624266/-trochanteric-under-gluteus-lift-or-bodylift-technique-for-massive-trochanteric-lipodystrophy-about-11-cases
#10
L Ruffenach, C Bruant-Rodier, E Robert, F Bodin, C Dissaux
INTRODUCTION: There is a growing demand for weight loss sequelae. Some women have a particular morphology with a major trochanteric excess that warrants specific treatment. MATERIALS AND METHODS: On the basis of the technique published in 1964 by Pitanguy, the authors suggest a lift of the external face of the thigh with the scar redrawing the lower part of the buttock, from the gluteal fold to the inguinal region by crossing the trochanteric region. Eleven cases of major trochanteric excess after slimming are presented...
June 14, 2017: Annales de Chirurgie Plastique et Esthétique
https://www.readbyqxmd.com/read/28622755/cross-sensory-correspondences-heaviness-is-dark-and-low-pitched
#11
Peter Walker, Gabrielle Scallon, Brian Francis
Everyday language reveals how stimuli encoded in one sensory feature domain can possess qualities normally associated with a different domain (e.g., higher pitch sounds are bright, light in weight, sharp, and thin). Such cross-sensory associations appear to reflect crosstalk among aligned (corresponding) feature dimensions, including brightness, heaviness, and sharpness. Evidence for heaviness being one such dimension is very limited, with heaviness appearing primarily as a verbal associate of other feature contrasts (e...
July 2017: Perception
https://www.readbyqxmd.com/read/28596267/adaptations-of-motoneuron-properties-after-weight-lifting-training-in-rats
#12
Piotr Krutki, Włodzimierz Mrówczyński, Marcin Bączyk, Dawid Łochyński, Jan Celichowski
Resistance training, with repeated short-term and high-intensity exercises, is responsible for an increase in muscle mass and force. The aim of this study was to determine whether such training induces adaptations in the electrophysiological properties of motoneurons innervating the trained muscles and to relate these adaptive changes to previous observations made on motor unit contractile properties. The study was performed on adult male Wistar rats. Animals from the training group were subjected to a five-week voluntary progressive weight-lifting program, while control rats were restricted to standard cage activity...
June 8, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28593763/high-performance-electroactive-polymer-actuators-based-on-ultrathick-ionic-polymer-metal-composites-with-nanodispersed-metal-electrodes
#13
Hyuck Sik Wang, Jaehyun Cho, Dae Seok Song, Jong Hyun Jang, Jae Young Jho, Jong Hyuk Park
Ionic polymer-metal composites (IPMCs) have been proposed as biomimetic actuators that are operable at low applied voltages. However, the bending strain and generating force of the IPMC actuators have generally exhibited a trade-off relationship, whereas simultaneous enhancement of both the qualities is required for their practical applications. Herein, a significant improvement in both the strain and force of the IPMC actuators is achieved by a facile approach, exploiting thickness-controlled ion-exchange membranes and nanodispersed metal electrodes...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28593064/physiological-striae-atrophicae-of-adolescence-with-involvement-of-the-axillae-and-proximal-arms
#14
Alexander K C Leung, Benjamin Barankin
We report a 16-year-old adolescent male with multiple violaceous, atrophic, vertical linear striae isolated to the axillae and proximal arms of approximately one-year duration. In the past two years, he indulged in heavy weight-lifting. He experienced a growth spurt over the past few years. The patient was otherwise in good health and was not on any medications. Physiological striae atrophicae of adolescence where the striae were restricted to the axillae and proximal arms have very rarely been reported.
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28586247/holmium-laser-enucleation-of-the-prostate-after-prostatic-urethral-lift-surgery-feasibility-and-technical-considerations-from-a-multi-institutional-case-series
#15
Sean McAdams, Joel T Funk, Andrew F Navetta, Marawan M El Tayeb, Mitchell R Humphreys
INTRODUCTION AND OBJECTIVE: Ten percent of patients undergoing prostatic urethral lift (PUL) require repeat surgical treatment within 3 years. We describe the feasibility and considerations of performing holmium laser enucleation of the prostate (HoLEP) as a salvage therapy after previous PUL. METHODS: Men who had undergone HoLEP after PUL were retrospectively identified from three institutions with surgeons experienced in HoLEP. Subjects were characterized by age, time from PUL procedure (months) to HoLEP surgery, indication for retreatment, and pre-operative prostate volume by ultrasound...
July 5, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28584310/effects-of-external-loading-on-lumbar-extension-moment-during-squat-lifting
#16
Iman Vahdat, Mostafa Rostami, Farhad Tabatabai Ghomsheh, Siamak Khorramymehr, Ali Tanbakoosaz
OBJECTIVES: The main objective of this study has been qualitative investigation of the effects of external loading on the lumbar extension moment during squat lifting. Findings of this study may allow to determine the factor with the most considerable effect on the lumbar extension moment and may help determine the lumbar spine risk factors at temporo-spatial coordination during squat lifting. MATERIAL AND METHODS: Twelve healthy men volunteered to perform slow and fast squat lifting of a box of varied mass (4 kg, 8 kg and 12 kg)...
May 29, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28582869/postnatal-development-of-spasticity-following-transgene-insertion-in-the-mouse-%C3%AE-iv-spectrin-gene-sptbn4
#17
Eva Kichkin, Archunan Visvanathan, Frank J Lovicu, Daisy Y Shu, Shannon J Das, Stephen W Reddel, Emily P McCann, Katharine Y Zhang, Kelly L Williams, Ian P Blair, William D Phillips
BACKGROUND: The L25 mouse line was generated by random genomic insertion of a lens-specific transgene. Inbreeding of L25 hemizygotes revealed an unanticipated spastic phenotype in the hind limbs. OBJECTIVE: The goals were to characterize the motor phenotype in the L25 mice and to map the transgene insert site within the mouse genome. METHODS: Six pairs of L25+/- mice were repeatedly mated. Beginning at weaning, all progeny were inspected for body weight and motor signs twice weekly until they displayed predefined ethical criteria for termination...
2017: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/28561168/-plastic-surgical-correction-of-buried-penis
#18
Dominik Krzysztof Boliglowa, Seung-Min Ryu, Tarek Ebrahim, Henrik Menke
A "buried penis" causes functional problems and embarrassment. In the past, this complex condition was only seen in extremely overweight patients or as a result of severe inflammations in this region. More recently, this problem has also been observed in patients with massive weight loss following bariatric surgery. In these patients there is an abundance of extremely flaccid skin in the suprapubic region, which covers the penis and causes it to "disappear". This leads to balanitis and, in turn, further retraction of the penis...
April 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28558314/flexion-synergy-overshadows-flexor-spasticity-during-reaching-in-chronic-moderate-to-severe-hemiparetic-stroke
#19
Michael D Ellis, Ingrid Schut, Julius P A Dewald
OBJECTIVE: Pharmaceutical intervention targets arm flexor spasticity with an often-unsuccessful goal of improving function. Flexion synergy is a related motor impairment that may be inadvertently neglected. Here, flexor spasticity and flexion synergy are disentangled to determine their contributions to reaching dysfunction. METHODS: Twenty-six individuals participated. A robotic device systematically modulated shoulder abduction loading during ballistic reaching...
July 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28557850/compensatory-muscle-activation-during-unstable-overhead-squat-using-a-water-filled-training-tube
#20
Stephen C Glass, Robert W Albert
The purpose of this study was to assess compensatory muscle activation of core and support muscle during an overhead squat using a water-filled training tube. Eleven experienced weight lifting (age= 20.10 ± 0.99, mass 89.17 ± 6.88kg) men completed three, 30s trials of an overhead squat using an 11.4 kg tube that was partially filled with water. A central valve allowed three conditions of water movement: 50% open, 100% open, and a stable(S), closed valve condition. Subjects completed 8-10 repetitions within each condition...
May 23, 2017: Journal of Strength and Conditioning Research
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