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Hop test

Ikram Bezrati, Raouf Hammami, Mohamed Kacem Ben Fradj, Domenico Martone, Johnny Padulo, Moncef Feki, Anis Chaouachi, Naziha Kaabachi
Vitamin D is thought to regulate skeletal muscle function and boost physical performance. The aim of this study was to assess the relationship between vitamin D and physical performance in physically active children. This cross-sectional study included 125 children who practice football as a leisure activity. Plasma 25-hydroxyvitamin D (25-OHD) was assessed using a chemiluminescence immunoassay method. Vitamin D inadequacy was defined as 25-OHD < 20 ng/mL. Physical performance testing included measurements of muscle strength (maximal isometric contraction), jumping ability (vertical jump, standing broad jump, triple hop test), linear sprint (10 m and 20 m), and agility (9 × 4-m shuttle run)...
July 13, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Stephen P Bird, William J Markwick
BACKGROUND AND PURPOSE: Youth participation in basketball is on the rise, with basketball one of the top five participation sports in Australia. With increased participation there is a need for greater awareness of the importance of the pre-participation examination, including musculoskeletal screening and functional performance testing as part of a multidisciplinary approach to reducing the risk for future injuries. As majority of all basketball injuries affect the lower extremities, pre-participation musculoskeletal screening and functional performance testing should assess fundamental movement qualities throughout the kinetic chain with an emphasis on lower extremity force characteristics, specifically eccentric loading tasks...
October 2016: International Journal of Sports Physical Therapy
A D Wibawa, N Verdonschot, J P K Halbertsma, J G M Burgerhof, R L Diercks, G J Verkerke
This study focused on comparing muscle activities predicted by the Musculoskeletal Modeling System with EMG from ten healthy subjects who performed normal walking, one-legged forward hopping and side jumping. Eight EMG electrodes measured the activity of eight right leg muscles. Specific thresholds per muscle were applied on the EMG prior comparison. These thresholds were determined by equalizing the duration of EMG to AMS muscle activity. Three graph variables, number of onsets, offsets and hills were used to quantify the level of agreement by using Cohen׳s kappa analysis...
October 6, 2016: Journal of Biomechanics
Nguyen Thi Hong Hanh, Bui Thi Nhung, Duong Thi Anh Dao, Le Thi Tuyet, Le Thi Hop, Tran Quang Binh, Vu Thi Minh Thuc
BACKGROUND: The dyslipidemia associated with obesity plays a major role in the development of atherosclerosis and cardiovascular disease. Dyslipidemia in childhood can progress in adult stage. APOE is one of the most important genes that regulate plasma lipid transport and clearance. The study aimed to assess whether the common APOE polymorphism is associated with lipid profiles and dyslipidemia, and it could be modulated by obesity-related traits (body mass index, waist circumference, hip circumference, and waist-to-hip ratio) in Vietnamese children...
October 10, 2016: Lipids in Health and Disease
Reuven Ianconescu, Eli Pollak
Kramers' turnover theory, based on the dynamics of the collective unstable normal mode (also known as PGH theory), is extended to the motion of a particle on a periodic potential interacting bilinearly with a dissipative harmonic bath. This is achieved by considering the small parameter of the problem to be the deviation of the collective bath mode from its value along the reaction coordinate, defined by the unstable normal mode. With this change, the effective potential along the unstable normal mode remains periodic, albeit with a renormalized mass, or equivalently a renormalized lattice length...
October 7, 2016: Faraday Discussions
Henry C Astley
Anuran jumping is a model system for linking muscle physiology to organismal performance. However, anuran species display substantial diversity in their locomotion, with some species performing powerful leaps from riverbanks or tree branches, while other species move predominantly via swimming, short hops or even diagonal-sequence gaits. Furthermore, many anurans with similar locomotion and morphology are actually convergent (e.g. multiple independent evolutions of 'tree frogs'), while closely related species may differ drastically, as with the walking toad (Melanophryniscus stelzneri) and bullfrog-like river toad (Phrynoides aspera) compared with other Bufonid toads...
October 1, 2016: Journal of Experimental Biology
Yang Yang, Wei Ang, Haiyue Long, Ying Chang, Zicheng Li, Liangxue Zhou, Tao Yang, Yong Deng, Youfu Luo
A scaffold-hopping strategy toward Agomelatine based on in silico screening and knowledge analysis was employed to design novel antidepressant agents. A series of 3, 4-dihydroisoquinoline compounds were selected for chemical synthesis and biological assessment. Three compounds (6a-1, 6a-2, 6a-9) demonstrated protective effects on corticosterone-induced lesion of PC12 cells. Compound 6a-1 also displayed low inhibitory effects on the growth of HEK293 and L02 normal cells and it was further evaluated for its potential antidepressant effects in vivo...
October 4, 2016: Scientific Reports
Nadra E Lisha, Jeffrey W Jordan, Pamela M Ling
BACKGROUND: In California, young adult tobacco prevention is of prime importance; 63% of smokers start by the age of 18 years, and 97% start by the age of 26 years. We examined social affiliation with 'peer crowd' (eg, Hipsters) as an innovative way to identify high-risk tobacco users. METHODS: Cross-sectional surveys were conducted in 2014 (N=3368) among young adult bar patrons in 3 California cities. We examined use rates of five products (cigarettes, e-cigarettes, hookah, cigars and smokeless tobacco) by five race/ethnicity categories...
October 2016: Tobacco Control
Alexa Gomez, Alexandra N Petrucci, Lauren Dance, Jessica Morales Valenzuela, Nicole Gibbs, Cara C Dahlhausen, Jessica R Villatoro, Russell F Frohardt, Fay A Guarraci
The present study was designed to test the effects of an acute, high dose of methylphenidate (MPH; trademarked as Ritalin) on sexual behavior in female Long-Evans rats. In Experiment 1, naturally cycling subjects in estrus were tested for partner preference 20 min after receiving an i.p. injection of MPH 10.0 mg/kg (n=8) or saline (n=7). During the partner-preference test, female subjects were given the choice to interact with a sexually active male stimulus or a sexually receptive female stimulus. Physical contact was limited by placing the stimulus animals behind a wire mesh during the no-contact phase of the test, whereas physical contact was not limited during the contact phase...
September 27, 2016: Pharmacology, Biochemistry, and Behavior
Deydre S Teyhen, Daniel I Rhon, Robert J Butler, Scott W Shaffer, Stephen L Goffar, Danny J McMillian, Robert E Boyles, Kyle B Kiesel, Phillip J Plisky
CONTEXT:  Although inactivity, being overweight, smoking, and a history of injury are identified as risk factors for poor health and injury, few authors have examined their association on physical performance. Young adults may be more likely to adopt healthier lifestyles if they understand the effect of health behaviors on performance. OBJECTIVE:  To determine the association of being overweight, smoking, inactivity, and a history of injury with physical performance...
October 3, 2016: Journal of Athletic Training
Birgit M Dietz, Atieh Hajirahimkhan, Tareisha L Dunlap, Judy L Bolton
Botanical dietary supplements are increasingly popular for women's health, particularly for older women. The specific botanicals women take vary as a function of age. Younger women will use botanicals for urinary tract infections, especially Vaccinium macrocarpon (cranberry), where there is evidence for efficacy. Botanical dietary supplements for premenstrual syndrome (PMS) are less commonly used, and rigorous clinical trials have not been done. Some examples include Vitex agnus-castus (chasteberry), Angelica sinensis (dong quai), Viburnum opulus/prunifolium (cramp bark and black haw), and Zingiber officinale (ginger)...
October 2016: Pharmacological Reviews
Alexandre Rambaud, Pierre Samozino, Pascal Edouard
OBJECTIVE: After anterior cruciate ligament (ACL) tear, the ACL reconstruction (ACLR) is the standard treatment to return to pivots/contacts sports. The goal of rehabilitation programs is to guide the functional recovery and the safe return to sport without additional knee injury or other injuries. Functional tests, like Hop tests and their side to-side difference index [limb symmetry index (LSI)], are commonly used following ACLR to help return to sport decision making. However, the most commonly used criterion to return to sport is the postoperative time: return to light activities (RtlA) at 3 or 4 month mark and return to sport with contacts and side-cuttings (RtS) between 6 and 9 month mark...
September 2016: Annals of Physical and Rehabilitation Medicine
Alexandre Rambaud, Bertrand Semay, Jean-Benoit Morin, Rémi Phillipot, Pierre Samozino, Pascal Edouard
OBJECTIVE: A criterion of the anterior cruciate ligament reconstruction (ACLR) success is the return to sport at the same level as before surgery. Return to sport (RtS) decision seems to be a key element in this success: if too early RtS exposes to risk of injury, too late RtS influences the motivation to return to the same level. Functional tests (Hop Tests) and isokinetic assessments (Isok Tests) are usually performed to guide this decision. However, a precise and objective biomechanical analysis of running pattern would be more similarly to the sport activity...
September 2016: Annals of Physical and Rehabilitation Medicine
Lech Dobija, Emmanuel Coudeyre, Bruno Pereira
OBJECTIVE: The Star Excursion Balance Test (SEBT) has been lately used in the anterior cruciate ligament (ACL) deficient patients but its measurement properties are still unknown in this population. The purpose of this study was to estimate: the intrarater reliability, agreement, the construct validity of the SEBT, versus the one leg hop test (OLHT) and the self-reported function. PATIENTS AND METHODS: The ACL-deficient patients (n=18) performed three trials of the SEBT in the anterior (A), posteromedial (PM) and posterolateral (PL) direction and three trials of the OLHT bilaterally...
September 2016: Annals of Physical and Rehabilitation Medicine
Dmitri A Pissarnitski, Zhiqiang Zhao, David Cole, Wen-Lian Wu, Martin Domalski, John W Clader, Giovanna Scapin, Johannes Voigt, Aileen Soriano, Theresa Kelly, Mary Ann Powles, Zuliang Yao, Duane A Burnett
Molecular modeling of unbound tricyclic guanine scaffolds indicated that they can serve as effective bioisosteric replacements of xanthines. This notion was further confirmed by a combination of X-ray crystallography and SAR studies, indicating that tricyclic guanine DPP4 inhibitors mimic the binding mode of xanthine inhibitors, exemplified by linagliptin. Realization of the bioisosteric relationship between these scaffolds potentially will lead to a wider application of cyclic guanines as xanthine replacements in drug discovery programs for a variety of biological targets...
November 1, 2016: Bioorganic & Medicinal Chemistry
Rebecca L Krupenevich, Alison L Pruziner, Ross H Miller
: Increased or abnormal loading on the intact limb is thought to contribute to the relatively high risk of knee osteoarthritis (OA) in this limb for individuals with unilateral lower limb loss. This theory has been assessed previously by studying walking, but knee joint loading during walking is often similar between individuals with limb loss and individuals without limb loss, prompting assessment of other movements that may place unusual loads on the knee. One such movement, hopping, is a form of locomotion that individuals with unilateral lower limb loss may situationally use instead of walking, but the mechanical effects of hopping on the intact limb are unknown...
September 16, 2016: Medicine and Science in Sports and Exercise
Luis Urquiza-Aguiar, Carolina Tripp-Barba, Mónica Aguilar Igartua
Vehicular ad hoc networks (VANETs) leverage the communication system of Intelligent Transportation Systems (ITS). Recently, Delay-Tolerant Network (DTN) routing protocols have increased their popularity among the research community for being used in non-safety VANET applications and services like traffic reporting. Vehicular DTN protocols use geographical and local information to make forwarding decisions. However, current proposals only consider the selection of the best candidate based on a local-search. In this paper, we propose a generic Geographical Heuristic Routing (GHR) protocol that can be applied to any DTN geographical routing protocol that makes forwarding decisions hop by hop...
2016: Sensors
Tjerk Zult, Alli Gokeler, Jos J A M van Raay, Reinoud W Brouwer, Inge Zijdewind, Tibor Hortobágyi
PURPOSE: The function of the anterior cruciate ligament (ACL) patients' non-injured leg is relevant in light of the high incidence of secondary ACL injuries on the contralateral side. However, the non-injured leg's function has only been examined for a selected number of neuromuscular outcomes and often without appropriate control groups. We measured a broad array of neuromuscular functions between legs of ACL patients and compared outcomes to age, sex, and physical activity matched controls...
September 24, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
H Kamimura, R C Gouveia, S C Carrocine, L D Souza, A D Rodrigues, M D Teodoro, G E Marques, E R Leite, A J Chiquito
Indium phosphide nanowires with a single crystalline zinc-blend core and polycrystalline/amorphous shell were grown from a reliable route without the use of hazardous precursors. The nanowires are composed by a crystalline core covered by a polycrystalline shell, presenting typical lengths larger than 10 μm and diameters of 80-90 nm. Raman spectra taken from as-grown nanowires exhibited asymmetric line shapes with broadening towards higher wave numbers which can be attributed to phonon localization effects...
November 30, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Shun-Li Kan, Zhi-Fang Yuan, Guang-Zhi Ning, Bo Yang, Hai-Liang Li, Jing-Cheng Sun, Shi-Qing Feng
BACKGROUND: Anterior cruciate ligament (ACL) reconstruction is considered as the standard surgical procedure for the treatment of ACL tear. However, there is a crucial controversy in terms of whether to use autograft or allograft in ACL reconstruction. The purpose of this meta-analysis is to compare autograft with allograft for patients undergoing ACL reconstruction. METHODS: PubMed, EMBASE, and the Cochrane Library were searched for randomized controlled trials that compared autograft with allograft in ACL reconstruction up to January 31, 2016...
September 2016: Medicine (Baltimore)
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