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https://www.readbyqxmd.com/read/28930879/repeat-effort-performance-is-reduced-24-h-following-acute-dehydration-in-mixed-martial-arts-athletes
#1
Oliver R Barley, Fiona Iredale, Dale W Chapman, Amanda Hopper, Chris Abbiss
This study sought to determine the influence of acute dehydration on physical performance and physiology in Mixed Martial Arts (MMA). MMA athletes (n=14; age: 23±4 years), completed in a randomised counterbalanced order a dehydration protocol, (DHY: 3 h cycling at 60 W in 40°C to induce 5% dehydration) or thermoneutral control (25°C: CONT) exercise, followed by ad libitum fluid/food intake. Performance testing (a repeat sled push test, medicine ball chest throw and vertical jump) was completed 3 and 24 h following the intervention, while urine and blood samples were collected before, 20 min, 3 and 24 h following the intervention...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28917232/compressed-food-with-added-functional-oligopeptides-improves-performance-during-military-endurance-training
#2
Zhi-Qiang Zheng, Zhan-Hui Geng, Jia-Xi Liu, Shun-Tang Guo
BACKGROUND AND OBJECTIVES: Oligosaccharide or oligopeptide supplementation may have a significant impact on endurance performance. This study evaluated the effects of adding maltooligosaccharides (MO) or soy oligopeptides (SO) to compressed food (CF) on the physical response of soldiers to daily military training. METHODS AND STUDY DESIGN: Twelve soldiers were randomized to four diet groups: regular meals, CF, CFMO, and CFSO (crossover design). They participated in exercise tests including 90 minutes running at 55-65% VO2max and exhaustive running...
2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28878480/anti-gravity-treadmill-can-promote-aerobic-exercise-for-lower-limb-osteoarthritis-patients
#3
Toshihiro Kawae, Yukio Mikami, Kouki Fukuhara, Hiroaki Kimura, Nobuo Adachi
[Purpose] The anti-gravity treadmill (Alter-G(®)) allows the load on the lower limbs to be adjusted, which is considered useful for patients with lower limb osteoarthritis. The aim of the present study was to examine the effects of aerobic exercise using an anti-gravity treadmill in patients with lower limb osteoarthritis by using a cardiopulmonary exercise load monitoring system. [Subjects and Methods] The subjects were 20 patients with lower limb osteoarthritis. These subjects walked naturally for 8 minutes and then walked on the Alter-G for 8 minutes at their fastest speed at a load where lower limb pain was alleviated...
August 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28861743/feasibility-and-safety-of-exercise-stress-testing-using-an-anti-gravity-treadmill-with-tc-99m-tetrofosmin-single-photon-emission-computed-tomography-spect-myocardial-perfusion-imaging-a-pilot-non-randomized-controlled-study
#4
Patrick Daly, Regina Kayse, Steven Rudick, Nathan Robbins, Jennifer Scheler, David Harris, Robert O'Donnell, Alok K Dwivedi, Myron C Gerson
BACKGROUND: Exercise is the AHA/ACC guideline-recommended stress modality for myocardial perfusion imaging, but many patients are unable to exercise to target heart rate on a conventional treadmill. We examined the feasibility and safety of stress imaging using an anti-gravity treadmill in patients with perceived poor exercise capacity. METHODS AND RESULTS: 49 patients were recruited for stress testing by anti-gravity treadmill (n = 29) or to a regadenoson control group (n = 20)...
August 31, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28860998/human-biomechanical-and-cardiopulmonary-responses-to-partial-gravity-a-systematic-review
#5
REVIEW
Charlotte Richter, Bjoern Braunstein, Andrew Winnard, Mona Nasser, Tobias Weber
The European Space Agency has recently announced to progress from low Earth orbit missions on the International Space Station to other mission scenarios such as exploration of the Moon or Mars. Therefore, the Moon is considered to be the next likely target for European human space explorations. Compared to microgravity (μg), only very little is known about the physiological effects of exposure to partial gravity (μg < partial gravity <1 g). However, previous research studies and experiences made during the Apollo missions comprise a valuable source of information that should be taken into account when planning human space explorations to reduced gravity environments...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28858055/thermoregulatory-and-perceptual-effects-of-a-percooling-garment-worn-underneath-an-american-football-uniform
#6
Megan L Keen, Kevin C Miller, Micah N Zuhl
American football athletes are at the highest risk of developing exertional heat illness (EHI). We investigated whether percooling (i.e., cooling during exercise) garments affected perceptual or physiological variables in individuals exercising in the heat while wearing football uniforms. Twelve males (age=24±4y, mass=80.1±8.5kg, height=182.5±10.4cm) completed this cross-over, counterbalanced study. On day 1, we measured peak oxygen consumption (V[Combining Dot Above]O2). On days 2 and 3, participants wore percooling garments with (ICE) or without (CON) ice packs over the femoral and brachial arteries...
August 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28853743/evaluation-and-review-of-body-fluids-saliva-sweat-and-tear-compared-to-biochemical-hydration-assessment-markers-within-blood-and-urine
#7
REVIEW
M Villiger, R Stoop, T Vetsch, E Hohenauer, M Pini, P Clarys, F Pereira, R Clijsen
Evaluating and testing hydration status is increasingly requested by rehabilitation, sport, military and performance-related activities. Besides commonly used biochemical hydration assessment markers within blood and urine, which have their advantages and limitations in collection and evaluating hydration status, there are other potential markers present within saliva, sweat or tear. This literature review focuses on body fluids saliva, sweat and tear compared to blood and urine regarding practicality and hydration status influenced by fluid restriction and/or physical activity...
August 30, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28847143/description-of-three-female-24-h-ultra-endurance-race-winners-in-various-weather-conditions-and-disciplines
#8
Daniela Chlíbková, Thomas Rosemann, Beat Knechtle, Pantelis T. Nikolaidis, Alena Žákovská, Karl Sudi
A The incidence of exercise-associated hyponatremia (EAH) is higher in women than in men. We present three cases of a very mild post-race EAH in female winners of three 24-h ultra races in various weather conditions and disciplines with post-race plasma sodium [Na⁺] levels of 134 mM (Case 1), 133 mM (Case 2) and 134 mM (Case 3). Moreover, Case 1 and Case 2 showed elevated creatine kinase concentrations of >10,000 U/l with an absence of renal function abnormality. The common characteristics were female sex, veteran recreational category, long race experience in the particular sports discipline, excellent race performance, similar total weekly training hours and the presence of luteal phase of the menstrual cycle during the race...
August 31, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28813913/emu-a-transparent-3d-robotic-manipulandum-for-upper-limb-rehabilitation
#9
Justin Fong, Vincent Crocher, Ying Tan, Denny Oetomo, Iven Mareels
This paper introduces the EMU, a three-dimensional robotic manipulandum for rehabilitation of the upper extremity for patients with neurological injury. The device has been designed to be highly transparent, have a large workspace, and allow the use of the hand for interaction with real-world objects to provide additional contextual cues during exercises. The transparency is achieved through the use of a capstan transmission for the drive joints; a hybrid serial parallel kinematics minimising moving inertia; and lightweight materials...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813793/the-combined-action-of-a-passive-exoskeleton-and-an-emg-controlled-neuroprosthesis-for-upper-limb-stroke-rehabilitation-first-results-of-the-retrainer-project
#10
E Ambrosini, S Ferrante, J Zajc, M Bulgheroni, W Baccinelli, E d'Amico, T Schauer, C Wiesener, M Russold, M Gfoehler, M Puchinger, M Weber, S Becker, K Krakow, M Rossini, D Proserpio, G Gasperini, F Molteni, G Ferrigno, A Pedrocchi
The combined use of Functional Electrical Stimulation (FES) and robotic technologies is advocated to improve rehabilitation outcomes after stroke. This work describes an arm rehabilitation system developed within the European project RETRAINER. The system consists of a passive 4-degrees-of-freedom exoskeleton equipped with springs to provide gravity compensation and electromagnetic brakes to hold target positions. FES is integrated in the system to provide additional support to the most impaired muscles. FES is triggered based on the volitional EMG signal of the same stimulated muscle; in order to encourage the active involvement of the patient the volitional EMG is also monitored throughout the task execution and based on it a happy or sad emoji is visualized at the end of each task...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28812943/tear-osmolarity-is-sensitive-to-exercise-induced-fluid-loss-but-is-not-associated-with-common-hydration-measures-in-a-field-setting
#11
Justin J Holland, Michelle Ray, Christopher Irwin, Tina L Skinner, Michael Leveritt, Ben Desbrow
This investigation (i) examined changes in tear osmolarity in response to fluid loss that occurs with exercise in a field setting, and (ii) compared tear osmolarity with common field and laboratory hydration measures.  Sixty-three participants [age 27.8 ± 8.4 years, body mass 72.15 ± 10.61 kg] completed a self-paced 10 km run outside on a predetermined course. Body mass, tear fluid, venous blood and urine samples were collected immediately before and after exercise.  Significant (p < 0.001) reductions in body mass (1...
August 16, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28736514/design-and-validation-of-exoskeleton-actuated-by-soft-modules-toward-neurorehabilitation-vision-based-control-for-precise-reaching-motion-of-upper-limb
#12
Victoria W Oguntosin, Yoshiki Mori, Hyejong Kim, Slawomir J Nasuto, Sadao Kawamura, Yoshikatsu Hayashi
We demonstrated the design, production, and functional properties of the Exoskeleton Actuated by the Soft Modules (EAsoftM). Integrating the 3D printed exoskeleton with passive joints to compensate gravity and with active joints to rotate the shoulder and elbow joints resulted in ultra-light system that could assist planar reaching motion by using the vision-based control law. The EAsoftM can support the reaching motion with compliance realized by the soft materials and pneumatic actuation. In addition, the vision-based control law has been proposed for the precise control over the target reaching motion within the millimeter scale...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28720182/ground-reaction-forces-during-reduced-gravity-running-in-parabolic-flight
#13
Peter Cavanagh, Andrea Rice, Molly Glauberman, Amanda Sudduth, Arien Cherones, Shane Davis, Michael Lewis, Andrea Hanson, Grier Wilt
BACKGROUND: Treadmills have been employed as both a form of exercise and a countermeasure to prevent changes in the musculoskeletal system on almost all NASA missions and many Russian missions since the early Space Shuttle flights. It is possible that treadmills may also be part of exercise programs on future Mars missions and that they may be a component of exercise facilities in lunar or Martian habitats. METHODS: In order to determine if the ambient gravity on these destinations will provide osteogenic effects while performing exercise on a treadmill, ground reactions forces (GRFs) were measured on eight subjects (six women and two men) running at 6 mph during parabolic flight in Martian and lunar gravity conditions...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28610442/the-effect-of-a-corrective-functional-exercise-program-on-postural-thoracic-kyphosis-in-teenagers-a-randomized-controlled-trial
#14
Qiang Feng, Mei Wang, Yanfeng Zhang, Yu Zhou
OBJECTIVE: To investigate the effects of a corrective functional exercise program on postural thoracic kyphosis in teenagers in China. DESIGN: A single-blind randomized controlled trial including students with a thoracic kyphosis angle (TKA) >40° measured using the SpinalMouse. SETTING: China Institute of Sport Science and three middle schools in Beijing, China. SUBJECTS: A total of 181 subjects were included in this trial; of these, 164 subjects were included in the analyses (intervention group, n = 81; control group, n = 83)...
June 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28580400/replacement-of-daily-load-attenuates-but-does-not-prevent-changes-to-the-musculoskeletal-system-during-bed-rest
#15
Peter R Cavanagh, Andrea J Rice, Sara C Novotny, Kerim O Genc, Ricki K Englehaupt, Tammy M Owings, Bryan Comstock, Tamre Cardoso, Hakan Ilaslan, Scott M Smith, Angelo A Licata
The dose-response effects of exercise in reduced gravity on musculoskeletal health have not been well documented. It is not known whether or not individualized exercise prescriptions can be effective in preventing the substantial loss in bone mineral density and muscle function that have been observed in space flight and in bed rest. In this study, typical daily loads to the lower extremities were quantified in free-living subjects who were then randomly assigned to control or exercise groups. Subjects were confined to 6-degree head-down bed rest for 84 days...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28496410/clinical-applications-of-iso-inertial-eccentric-overload-yoyo%C3%A2-resistance-exercise
#16
REVIEW
Per A Tesch, Rodrigo Fernandez-Gonzalo, Tommy R Lundberg
In the quest for a viable non-gravity dependent method to "lift weights" in space, our laboratory introduced iso-inertial resistance (YoYo™) exercise using spinning flywheel(s), more than 25 years ago. After being thoroughly tested in individuals subjected to various established spaceflight analogs, a multi-mode YoYo™ exercise apparatus was eventually installed on the International Space Station in 2009. The method, applicable to any muscle group, provides accommodated resistance and optimal muscle loading through the full range of motion of concentric actions, and brief episodes of eccentric overload...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28406700/moderate-exercise-based-on-artificial-gravity-preserves-orthostatic-tolerance-and-exercise-capacity-during-short-term-head-down-bed-rest
#17
Xiao-Tao Li, Chang-Bin Yang, Yong-Sheng Zhu, Jing Sun, Fei Shi, Yong-Chun Wang, Yuan Gao, Jiang-Dong Zhao, Xi-Qing Sun
Numerous countermeasures have been proposed to minimize microgravity-induced physical deconditioning, but their benefits are limited. The present study aimed to investigate whether personalized aerobic exercise based on artificial gravity (AG) mitigates multisystem physical deconditioning. Fourteen men were assigned to the control group (n=6) and the countermeasure group (CM, n=8). Subjects in the CM group were exposed to AG (2Gz at foot level) for 30 min twice daily, during which time cycling exercise of 80-95% anaerobic threshold (AT) intensity was undertaken...
April 12, 2017: Physiological Research
https://www.readbyqxmd.com/read/28387536/case-study-hydration-intervention-improves-pre-game-hydration-status-in-female-collegiate-soccer-players
#18
Neele R Hoerner, Kirsten Domnik, Karsten Koehler, Wilhelm Schaenzer, Hans Braun
Little is known about whether athletes follow hydration guidelines. The objective of the present study was to assess fluid status in female soccer players in a hot and humid environment, and to assess the effect of an intervention aimed at preventing players from exercising in a dehydrated state. We hypothesized that following the intervention, players would exhibit improved hydration status, as indicated by greater voluntary fluid intake and improved hydration markers. Ten female collegiate soccer players (20±1yrs...
April 7, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28347463/level-of-minerals-and-trace-elements-in-the-urine-of-the-participants-of-mountain-ultra-marathon-race
#19
Jasna Jablan, Suzana Inić, Hagen Stosnach, Maja Ortner Hadžiabdić, Lovorka Vujić, Ana-Marija Domijan
The aim of the present study was to explore impact of endurance exercise on urinary level of minerals and trace elements as well as on some oxidative stress and biochemical parameters. Urine samples were collected from participants (n=21) of mountain ultra-marathon race (53km; Medvednica, Zagreb, Croatia), before (baseline value), immediately after, 12h and 24h after the race. In urine samples level of minerals (Ca, P, K and Na) and trace elements (Se, Zn, Mn, Cu, Fe and Co) were assessed using the bench top Total reflection X-ray Fluorescence (TXRF) spectrometer...
May 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28338599/volumetric-control-of-whole-blood-collection-in-austere-environments
#20
Michael A Meledeo, Andrew D Fisher, Grantham C Peltier, Ethan A Miles, William B Muse, Win B Kerr, Shawn C Nessen, Andrew P Cap
INTRODUCTION: Fresh whole blood transfusions are a powerful tool in prehospital care; however, the lack of equipment such as a scale in field situations frequently leads to collections being under- or overfilled, leading to complications for both patient and physician. This study describes two methods for simple, rapid control of collection bag volume: (1) a length of material to constrict the bag, and (2) folding/clamping the bag. METHOD: Whole blood collection bags were allowed to fill with saline via gravity...
June 2017: Journal of Trauma and Acute Care Surgery
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