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https://www.readbyqxmd.com/read/28923581/constraints-representing-a-meta-stable-r%C3%A3-gime-facilitate-exploration-during-practice-and-transfer-of-learning-in-a-complex-multi-articular-task
#1
Dominic Orth, Keith Davids, Ludovic Seifert
Previous investigations have shown that inducing meta-stability in behavior can be achieved by overlapping affordances through constraint manipulation, allowing cooperative and competitive tendencies to functionally coexist. The purpose of this paper was to test a number of conditions applying these design principles on performance during skills practice and transfer. Of additional interest, was whether the existing skill level interacted with the environmental properties of the experimental tasks (varying indoor climbing routes)...
September 16, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28882263/evaluating-the-stability-of-a-freestanding-mast-climbing-work-platform
#2
Bryan Wimer, Christopher Pan, Tim Lutz, Mat Hause, Chris Warren, Ren Dong, Sherry Xu
Mast Climbing Work Platforms (MCWPs) are becoming more common at construction sites and are being used as an alternative to traditional scaffolding. Although their use is increasing, little to no published information exists on the potential safety hazards they could pose for workers. As a last line of defense, a personal fall-arrest system can be used to save a worker in a fall incident from the platform. There has been no published information on whether it is safe to use such a personal fall-arrest system with MCWPs...
September 2017: Journal of Safety Research
https://www.readbyqxmd.com/read/28869622/spinal-range-of-motion-and-plantar-pressure-in-sport-climbers
#3
Arletta Hawrylak, Krystyna Chromik, Barbara Ratajczak, Katarzyna Barczyk-Pawelec, Ewa Demczuk-Włodarczyk
PURPOSE: The aim of the study was to investigate the range of motion (ROM) of lumbar and thoracic articulations and static and dynamic plantar pressure in sport climbing athletes. METHODS: The sample included 30 sport climbers with a minimum of 2 years training experience and 30 physical education students who served as an active untrained control. ROM was assessed by a Saunders digital inclinometer and plantar pressure by a baropodometric platform. RESULTS: Mean spinal ROMs were greater in the sport climbers with an exception of extension, rotation, and lateral thoracic flexion, with a high degree of statistical significance obtained in the majority of the analyzed ROMs...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28806646/static-flexural-properties-of-hedgehog-spines-conditioned-in-coupled-temperature-and-relative-humidity-environments
#4
Emily B Kennedy, Bor-Kai Hsiung, Nathan B Swift, Kwek-Tze Tan
Hedgehogs are agile climbers, scaling trees and plants to heights exceeding 10m while foraging insects. Hedgehog spines (a.k.a. quills) provide fall protection by absorbing shock and could offer insights for the design of lightweight, material-efficient, impact-resistant structures. There has been some study of flexural properties of hedgehog spines, but an understanding of how this keratinous biological material is affected by various temperature and relative humidity treatments, or how spine color (multicolored vs...
August 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28771525/the-role-of-physique-strength-and-endurance-in-the-achievements-of-elite-climbers
#5
Mariusz Ozimek, Robert Rokowski, Paweł Draga, Vladimir Ljakh, Tadeusz Ambroży, Marcin Krawczyk, Tomasz Ręgwelski, Arkadiusz Stanula, Karol Görner, Adam Jurczak, Dariusz Mucha
PURPOSE: The primary aim of this study is to determine the principal somatic and motor determinants for elite climbers. METHODS: Twenty climbers were examined [age: 28.5±6.1 years].The runners were divided into two groups based on their climbing level, according to the International Rock Climbing Research Association (IRCRA). Elite climbers represented a 8b-8c Rotpunkt (RP) climbing level (n = 6), and advanced climbers represented an 7c+-8a RP level (n = 14). The following measurements were assessed: height, weight, lean body mass, upper limb length, arm span, and forearm, arm, thigh and calf circumference...
2017: PloS One
https://www.readbyqxmd.com/read/28769023/isolation-purification-and-structural-characterization-of-two-novel-water-soluble-polysaccharides-from-anredera-cordifolia
#6
Zhi-Peng Zhang, Can-Can Shen, Fu-Li Gao, Hui Wei, Di-Feng Ren, Jun Lu
Anredera cordifolia, a climber and member of the Basellaceae family, has long been a traditional medicine used for the treatment of hyperglycemia in China. Two water-soluble polysaccharides, ACP1-1 and ACP2-1, were isolated from A. cordifolia seeds by hot water extraction. The two fractions, ACP1-1 and ACP2-1 with molecular weights of 46.78 kDa ± 0.03 and 586.8 kDa ± 0.05, respectively, were purified by chromatography. ACP1-1 contained mannose, glucose, galactose in a molar ratio of 1.08:4.65:1.75, whereas ACP2-1 contained arabinose, ribose, galactose, glucose, mannose in a molar ratio of 0...
August 3, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28767727/rock-climbing-alters-plant-species-composition-cover-and-richness-in-mediterranean-limestone-cliffs
#7
Juan Lorite, Fabio Serrano, Adrián Lorenzo, Eva M Cañadas, Miguel Ballesteros, Julio Peñas
Rock climbing is among the outdoor activities that have undergone the highest growth since the second half of the 20th century. As a result, cliff habitats, historically one of the least disturbed by human colonization worldwide, are facing more intense human pressure than ever before. However, there is little data on the impact of this activity in plant-communities, and such information is indispensable for adequate manager decision-making. The goal of this study was to determine the impact of rock climbing on plant communities in terms of cover, richness, and composition in relation to climbing intensity on typical Mediterranean limestone cliffs...
2017: PloS One
https://www.readbyqxmd.com/read/28755819/descriptive-epidemiology-medical-evaluation-and-outcomes-of-rock-climbing-injuries
#8
James W McDonald, A Michael Henrie, Masaru Teramoto, Edward Medina, Stuart E Willick
OBJECTIVE: To gather epidemiologic data on injury type, treatment, and recovery from rock climbing injuries. METHODS: Design: retrospective cross-sectional study. SETTING: web-based survey. PARTICIPANTS: rock climbers who sustained a climbing-related injury during the prior 24 months. Criteria for inclusion: aged ≥18 years; participation in rock climbing at least 4 times per year in the United States. INTERVENTIONS: none...
July 26, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28753391/differences-in-forearm-strength-endurance-and-hemodynamic-kinetics-between-male-boulderers-and-lead-rock-climbers
#9
S Fryer, K J Stone, J Sveen, T Dickson, V España-Romero, D Giles, J Baláš, L Stoner, N Draper
This study examined differences in the oxygenation kinetics and strength and endurance characteristics of boulderers and lead sport climbers. Using near infrared spectroscopy, 13-boulderers, 10-lead climbers, and 10-controls completed assessments of oxidative capacity index and muscle oxygen consumption (m⩒O2) in the flexor digitorum profundus (FDP), and extensor digitorum communis (EDC). Additionally, forearm strength (maximal volitional contraction MVC), endurance (force-time integral FTI at 40% MVC), and forearm volume (FAV and ΔFAV) was assessed...
October 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28743580/comparison-of-balance-strategies-in-mountain-climbers-during-real-altitude-exposure-between-1-500m-and-3-200m-effects-of-age-and-expertise
#10
Anne-Violette Bruyneel, Arnaud Humbert, Marc Bertrand
PURPOSE: The aim of this study was to estimate the effect of altitude (1500m vs. 3200m) on balance strategies, and to determine the influence of age (> or <40 years) and expertise (> or <20days of mountain climbing/year) on postural stability at altitude. METHOD: Eighty-nine volunteer mountaineers were tested at 1500m, 3200m immediately after exiting the cable car and at 3200m following the climb and return. Double-leg stance with eyes closed and single-leg stance with eyes open were tested...
July 22, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28732027/serum-irisin-and-myostatin-levels-after-2-weeks-of-high-altitude-climbing
#11
Ewa Śliwicka, Tomasz Cisoń, Zbigniew Kasprzak, Alicja Nowak, Łucja Pilaczyńska-Szcześniak
Exposure to high-altitude hypoxia causes physiological and metabolic adaptive changes by disturbing homeostasis. Hypoxia-related changes in skeletal muscle affect the closely interconnected energy and regeneration processes. The balance between protein synthesis and degradation in the skeletal muscle is regulated by several molecules such as myostatin, cytokines, vitamin D, and irisin. This study investigates changes in irisin and myostatin levels in male climbers after a 2-week high-altitude expedition, and their association with 25(OH)D and indices of inflammatory processes...
2017: PloS One
https://www.readbyqxmd.com/read/28708327/sonography-of-non-neoplastic-disorders-of-the-hand-and-wrist-tendons
#12
REVIEW
Salvatore Gitto, Anna Guja Draghi, Ferdinando Draghi
Tendon disorders commonly cause hand and wrist disability and curtail the performance of work-related duties or routine tasks. Imaging is often needed for diagnosis, but it requires knowledge of the complex anatomic structures of the tendons of the hand and wrist as well as familiarity with related disorders. This review article aims to provide medical professionals with guidelines for the sonographic assessment of the tendons of hand and wrist and related disorders. Sonographic features of tendon disorders affecting the hand and wrist are described here, specifically: infectious tenosynovitis; tendon rupture or tearing; stenosing forms of tenosynovitis such as De Quervain disease and trigger finger; intersection syndrome; insertional tendinopathy; several forms of tendinous instability such as extensor carpi ulnaris instability, climber finger, and boxer knuckle; and tendinopathy in inflammatory rheumatic diseases...
July 14, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28698111/phylogeny-and-biogeography-of-maclura-moraceae-and-the-origin-of-an-anachronistic-fruit
#13
Elliot M Gardner, Paya Sarraf, Evelyn W Williams, Nyree J C Zerega
BACKGROUND AND AIMS: Maclura (ca. 12 spp., Moraceae) is a widespread genus of trees and woody climbers found on five continents. Maclura pomifera, the Osage orange, is considered a classic example of an anachronistic fruit. Native to the central USA, the grapefruit-sized Osage oranges are unpalatable and have no known extant native dispersers, leading to speculation that the fruits were adapted to extinct megafauna. Our aim was to reconstruct the phylogeny, estimate divergence dates, and infer ancestral ranges of Maclura in order to test the monophyly of subgeneric classifications and to understand evolution and dispersal patterns in this globally distributed group...
July 8, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28696958/rock-climbing-related-bone-marrow-edema-of-the-hand-a-follow-up-study
#14
Christoph Lutter, Thomas Hochholzer, Thomas Bayer, Volker Schöffl
OBJECTIVE: Sport climbers strain passive and active anatomical structures of their hands and fingers to the maximum during training or competition. This study was designed to investigate bone marrow edema (BME) in rock climbing athletes. DESIGN: Systematic detection, treatment, and follow-up investigation of rock climbing athletes with BME of the hand. SETTING: Primary-level orthopedic surgery and sports medicine division of a large academic medical center...
July 6, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28685479/neoteric-trends-in-tissue-culture-mediated-biotechnology-of-indian-ipecac-tylophora-indica-burm-f-merrill
#15
REVIEW
Saikat Gantait, Suprabuddha Kundu
Tylophora indica (Burm. f.) Merrill, an ethno-pharmacologically important perennial climber of Asclepiadaceae, is commonly known as Antamul or Indian ipecac. It is essentially accredited for its medicinal properties owing to its wide range of alkaloids in the form of bioactive secondary metabolites, such as tylophorine, tylophorinine, and tylophorinidine. Accelerated mass propagation of Tylophora is challenging because of its reduced seed germination frequency that consequently headed the pursuit for efficient protocols on in vitro propagation for the large-scale regeneration, conservation as well as sustainable supply of quality propagules...
July 2017: 3 Biotech
https://www.readbyqxmd.com/read/28673743/-ice-axe-wrist-a-case-report-of-intersection-syndrome-in-2-climbers
#16
Anna L Tobin
Intersection syndrome is an inflammatory condition located at the crossing point between the first and second dorsal compartments in the wrist. It is an uncommon presentation but has been recognized as an injury typical of rowers (when it is named oarsman's wrist) and other sports such as racquet sports, baseball, cycling, hockey, golf, ice hockey, skiing, and softball. It has not been previously described in climbers. This report details 2 cases of intersection associated with the use of an ice axe. The first presentation was in a female climber who was using an ice axe for climbing in the Nepal Himalayas and the second was in a male climber using an ice axe for winter climbing training in the Alps...
June 30, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28644933/survey-of-hand-and-upper-extremity-injuries-among-rock-climbers
#17
Clayton E Nelson, Ghazi M Rayan, Dustin I Judd, Kai Ding, Julie A Stoner
BACKGROUND: Rock climbing first evolved as a sport in the late 18th century. With its growing popularity, the number of rock climbing-related injuries has potential to increase, spurring a rise in the number of articles associated with it. Despite the available literature, there remains a paucity of information about upper extremity injuries sustained by rock climbers, and no studies to date have focused on gender-specific injuries. METHODS: A 24-question online survey was distributed to rock climbers about upper extremity injuries sustained during rock climbing...
July 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28638879/traditional-knowledge-of-medicinal-plants-in-tribes-of-tripura-in-northeast-india
#18
Maria Debbarma, Nazir A Pala, Munesh Kumar, Rainer W Bussmann
BACKGROUND: The present study was carried out in Mandwi area and its outskirts of Tripura district of tribal areas Autonomous district council to document the available ethno-medicinal plants and their traditional application among Mandwi tribes. METHODOLOGY: Field explorations were carried out during the months of March-June 2013. The ethno-medicinal survey was conducted particularly with Tripuri tribe in Mandai area, with the help of local medicine men, locally known as bhoidho (Tripuri)...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28633788/fluoroscopic-and-gait-analyses-for-the-functional-performance-of%C3%A2-a%C3%A2-custom-made-total-talonavicular-replacement
#19
Claudio Belvedere, Matteo Cadossi, Antonio Mazzotti, Sandro Giannini, Alberto Leardini
The present study evaluated the restoration of joint function in a special clinical case: a professional rock climber who underwent an original total talonavicular replacement with a custom-made prosthesis after a complex articular fracture. Full body gait analysis and 3-dimensional joint kinematics using single-plane fluoroscopy were performed on the same day at the 30-month follow-up examination. Gait analysis was performed using stereophotogrammetric, dynamometric, electromyographic, and baropodometric systems...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28631623/morphological-self-stabilization-of-locomotion-gaits-illustration-on-a-few-examples-from-bio-inspired-locomotion
#20
Christine Chevallereau, Frédéric Boyer, Mathieu Porez, Johan Mauny, Yannick Aoustin
To a large extent, robotics locomotion can be viewed as cyclic motions, named gaits. Due to the high complexity of the locomotion dynamics, to find the control laws that ensure an expected gait and its stability with respect to external perturbations, is a challenging issue for feedback control. To address this issue, a promising way is to take inspiration from animals that intensively exploit the interactions of the passive degrees of freedom of their body with their physical surroundings, to outsource the high-level exteroceptive feedback control to low-level proprioceptive ones...
June 20, 2017: Bioinspiration & Biomimetics
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