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https://www.readbyqxmd.com/read/28715263/acute-effect-of-virtual-reality-exercise-bike-games-on-college-students-physiological-and-psychological-outcomes
#1
Nan Zeng, Zachary Pope, Zan Gao
Commercially available virtual reality (VR) exercise systems are extensively used in many health domains among clinical populations. However, evidence regarding the efficacy of this technology on healthy adults' health-related outcomes is unknown. This pilot study compared physiological and psychological responses following exercise on a VR-based exercise bike (VirZoom) and traditional stationary exercise bike. Twelve healthy college students (9 females; Mage = 25.01, SD = ± 4.74; MBMI = 22.84, SD = ± 3...
July 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/28696134/arterial-stiffness-is-associated-to-cardiorespiratory-fitness-and-body-mass-index-in-young-swedish-adults-the-lifestyle-biomarkers-and-atherosclerosis-study
#2
Ulrika Fernberg, Maria Fernström, Anita Hurtig-Wennlöf
Background Early changes in the large muscular arteries are already associated with risk factors as hypertension and obesity in adolescence and young adulthood. The present study examines the association between arterial stiffness measurements, pulse wave velocity and augmentation index and lifestyle-related factors, body composition and cardiorespiratory fitness, in young, healthy, Swedish adults. Design This study used a population-based cross-sectional sample. Methods The 834 participants in the study were self-reported healthy, non-smoking, age 18-25 years...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28671853/physiological-and-anthropometric-characteristics-of-top-level-youth-cross-country-cyclists
#3
Alessandro Fornasiero, Aldo Savoldelli, Roberto Modena, Gennaro Boccia, Barbara Pellegrini, Federico Schena
In the literature there is a lack of data about the development of top level athletes in cross-country mountain biking (XCO). The purpose of this study was to analyze anthropometric and physiological characteristics of some of the best XCO bikers aged between 13 and 16. The study involved 45 bikers (26 males and 19 females) belonging to a youth national team. The evaluations, consisting of anthropometric measures, incremental cycling tests (VO2max, PPO, P@RCP), and 30 s Wingate Tests (PMax, PMean), were conducted over a lapse of 4 years...
July 3, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28632064/the-effectiveness-of-front-fork-systems-at-damping-accelerations-during-isolated-aspects-specific-to-cross-country-mountain-biking
#4
Paul W Macdermid, Matthew C Miller, Philip W Fink, Stephen R Stannard
Cross-country mountain bike suspension reportedly enhances comfort and performance through reduced vibration and impact exposure. This study analysed the effectiveness of three different front fork systems at damping accelerations during the crossing of three isolated obstacles (stairs, drop, and root). One participant completed three trials on six separate occasions in a randomised order using rigid, air-sprung, and carbon leaf-sprung forks. Performance was determined by time to cross obstacles, while triaxial accelerometers quantified impact exposure and damping response...
March 1, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28605210/pacing-strategy-during-simulated-mountain-bike-racing
#5
Bruno Ferreira Viana, Flávio Oliveira Pires, Allan Inoue, Tony Meireles Santos
Cross-country mountain biking (XCO) is a popular high-intensity cycling endurance event, however, XCO pacing strategy has not been fully examined. This study examined the pacing strategies of different XCO athletes, during a laboratory-simulated XCO performance test. Brazilian cyclists classified as performance cohort level three (PL3-trained) performed an XCO race simulation. The simulation consisted of four 10 km laps with a gradient of 0-10%. No group vs. time interaction was found in lap time (P = 0.169), absolute (P = 0...
June 12, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28554739/that-s-how-you-do-it-generic-you-expresses-norms-during-early-childhood
#6
Ariana Orvell, Ethan Kross, Susan A Gelman
Prior research indicates that children construe norms as general and construe preferences as individual. The current studies tested whether this expectation is built into how children interpret and use language. We focused on the pronoun you, which is ambiguous between a canonical interpretation (referring to the addressee) and a generic interpretation (referring to people in general). In Study 1, children (N=132, ages 3-10years) were asked a series of questions containing "you," referring to either descriptive norms (e...
May 26, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28542333/it-takes-biking-to-learn-physical-activity-improves-learning-a-second-language
#7
Fengqin Liu, Simone Sulpizio, Suchada Kornpetpanee, Remo Job
Recent studies have shown that concurrent physical activity enhances learning a completely unfamiliar L2 vocabulary as compared to learning it in a static condition. In this paper we report a study whose aim is twofold: to test for possible positive effects of physical activity when L2 learning has already reached some level of proficiency, and to test whether the assumed better performance when engaged in physical activity is limited to the linguistic level probed at training (i.e. L2 vocabulary tested by means of a Word-Picture Verification task), or whether it extends also to the sentence level (which was tested by means of a Sentence Semantic Judgment Task)...
2017: PloS One
https://www.readbyqxmd.com/read/28536499/decreasing-sedentary-behavior-effects-on-academic-performance-meta-cognition-and-sleep
#8
June J Pilcher, Drew M Morris, Stewart A Bryant, Paul A Merritt, Hayley B Feigl
There is growing interest in using activity workstations as a method of increasing light physical activity in normally sedentary environments. The current study (N = 117) compared the effects of studying in college students while slowly pedaling a stationary bike with a desktop with studying at traditional desks across 10 weeks in an academic semester. The students were assigned to study either on the stationary bike or at a traditional desk located in the campus library for a minimum of 2 h a week. During the 10 weeks, the students studied for tests or worked on other required academic activities while working at their assigned desk...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28533619/the-effects-of-exercise-using-an-ergometer-with-swaying-saddle-on-chronic-lower-back-pain
#9
Seung Jin Byeon, Ki Hyun Kim
[Purpose] This study aims to investigate the effects of exercise using an ergometer with swaying saddle on chronic lower back pain. [Subjects and Methods] Thirty-three normal adults (university students) with chronic lower back pain were randomly recruited. The flexibility and strength of muscles were measured before and after an 8-week intervention. Belly-bike, an ergometer with a swaying saddle, was used. The duration of intervention was 30 minutes a day, 3 times a week. To measure the level of pain, visual analogue scale (VAS) and Korean Oswestry Disability Index were used...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28462576/world-and-olympic-mountain-bike-champions-anthropometry-body-composition-and-somatotype
#10
Cristóbal Sánchez-Muñoz, José J Muros, Mikel Zabala
BACKGROUND: The aim of the study was to describe the anthropometric profile of male Olympic cross country (XCO) mountain bikers. METHODS: Fifty one XCO bikers participated in this study, divided into an elite group who competed in top level international competitions, and a non-elite group who competed at a national level. The elite group was further classified according to whether they had been world or Olympic champion mountain bikers (WOC) or not (NWOC). The anthropometric profiles included the measurements of height, weight, arm span, skinfolds, girths, and breadths...
April 28, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28462573/physiological-performance-predictors-in-mountain-bike-multi-stage-races
#11
Louise Engelbrecht, Elmarie Terblanche
BACKGROUND: The study set out to identify physiological variables that may predict performance in The Cape Epic, an 8-day multi-stage mountain bike (MTB) race held annually in South Africa. METHODS: Twenty four amateur riders underwent VO2max testing within the 8 weeks prior to the event. Blood lactate measurements were taken to determine the power output corresponding to a fixed lactate concentration of 2 (LT2) and 4 mmol.l-1 (OBLA) during the incremental test...
April 28, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28446180/physical-activity-when-riding-an-electric-assisted-bicycle
#12
Sveinung Berntsen, Lena Malnes, Aleksander Langåker, Elling Bere
BACKGROUND: The objectives of the present study were to compare time spent cycling, exercise intensity, and time spent in moderate- (MPA) and vigorous intensity physical activity (VPA) when cycling on an E-bike and a conventional bicycle on two "cycling-to-work" routes with differences in topography, defined as a hilly and a flat route. METHODS: Eight adults (23-54 years, two women) cycled outdoors on a conventional bicycle and an E-bike, on a flat (8.2 km) and a hilly (7...
April 26, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28415065/acute-effect-of-biomechanical-muscle-stimulation-on-the-counter-movement-vertical-jump-power-and-velocity-in-division-i-football-players
#13
RANDOMIZED CONTROLLED TRIAL
Bert H Jacobson, Taylor P Monaghan, John H Sellers, Eric C Conchola, Zach K Pope, Rob G Glass
Jacobson, BH, Monaghan, TP, Sellers, JH, Conchola, EC, Pope, ZK, and Glass, RG. Acute effect of biomechanical muscle stimulation on the counter-movement vertical jump power and velocity in division I football players. J Strength Cond Res 31(5): 1259-1264, 2017-Research regarding whole body vibration (WBV) largely supports such training augmentation in attempts to increase muscle strength and power. However, localized biomechanical vibration has not received the same attention. The purpose of this study was to assess peak and average power before and after acute vibration of selected lower-body sites in division I athletes...
May 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28406361/predictors-of-performance-in-a-4-h-mountain-bike-race
#14
Andrew R Novak, Kyle J M Bennett, Job Fransen, Ben J Dascombe
This study aimed to cross validate previously developed predictive models of mountain biking performance in a new cohort of mountain bikers during a 4-h event (XC4H). Eight amateur XC4H cyclists completed a multidimensional assessment battery including a power profile assessment that consisted of maximal efforts between 6 and 600 s, maximal hand grip strength assessments, a video-based decision-making test as well as a XC4H race. A multiple linear regression model was found to predict XC4H performance with good accuracy (R(2) = 0...
April 13, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28352184/aerobic-fitness-is-associated-with-low-cardiovascular-disease-risk-the-impact-of-lifestyle-on-early-risk-factors-for-atherosclerosis-in-young-healthy-swedish-individuals-the-lifestyle-biomarker-and-atherosclerosis-study
#15
Maria Fernström, Ulrika Fernberg, Gabriella Eliason, Anita Hurtig-Wennlöf
BACKGROUND: The progression of cardiovascular disease (CVD) and atherosclerosis is slow and develops over decades. In the cross-sectional Swedish Lifestyle, Biomarker, and Atherosclerosis study, 834 young, self-reported healthy adults aged 18.0-25.9 years have been studied to identify early risk factors for atherosclerosis. PURPOSE: The aims of this study were to 1) assess selected cardiometabolic biomarkers, carotid intima-media thickness (cIMT) as a marker of subclinical atherosclerosis, and lifestyle-related indicators (food habits, handgrip strength, and oxygen uptake, VO2 max); 2) analyze the associations between cIMT and lifestyle factors; and 3) identify subjects at risk of CVD using a risk score and to compare the characteristics of subjects with and without risk of CVD...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/28282753/reliability-of-the-virtual-elevation-method-to-evaluate-rolling-resistance-of-different-mountain-bike-cross-country-tyres
#16
Thomas Maier, Beat Müller, Lucas Schmid, Thomas Steiner, Jon Peter Wehrlin
Although a low rolling resistance is advantageous in mountain bike cross-country racing, no studies have used the virtual elevation method to compare tyres from different manufacturers as used in international competitions so far. The aims of this study were to assess the reliability of this method, to compare the off-road rolling resistance between tyres and to calculate the influence on off-road speed. Nine 29-in. mountain bike cross-country tyres were tested on a course representing typical ground surface conditions 5 or 6 times...
February 9, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28270500/exploring-the-linkage-between-activity-friendly-zoning-inactivity-and-cancer-incidence-in-the-united-states
#17
EDITORIAL
Lisa M Nicholson, Julien Leider, Jamie F Chriqui
Background: Physical activity (PA) protects against cancer and enhances cancer survivorship. Given high inactivity rates nationwide, population-level physical activity facilitators are needed. Several authoritative bodies have recognized that zoning and planning helps create activity-friendly environments. This study examined the association between activity-friendly zoning, inactivity, and cancer in 478 of the most populous U.S. counties.Methods: County geocodes linked county-level data: cancer incidence and smoking (State Cancer Profiles), inactivity (Behavioral Risk Factor Surveillance System), 11 zoning measures (compiled by the study team), and covariates (from the American Community Survey and NAVTEQ)...
April 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28231426/engineering-of-anti-cd133-tri-specific-molecule-capable-of-inducing-nk-expansion-and-driving-antibody-dependent-cell-mediated-cytotoxicity-adcc
#18
Jörg U Schmohl, Martin Felices, Felix Oh, Alexander J Lenvik, Aaron M Lebeau, Jayanth Panyam, Jeffrey S Miller, Daniel A Vallera
Purpose: The selective elimination of cancer stem cells (CSCs) in tumor patients is a crucial goal because CSCs cause drug refractory relapse. To improve the current conventional bispecific immune-engager platform, a 16133 BiKE, consisting of scFvs binding FcγRIII (CD16) on NK cells and CD133 on carcinoma cells, was first synthesized and a modified IL-15 crosslinker capable of stimulating NK effector cells was introduced. Materials and Methods: DNA shuffling and ligation techniques were used to assemble and synthesize the 1615133 trispecific NK cell engager (TriKE)...
February 20, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28177737/peak-oxygen-uptake-in-a-sprint-interval-testing-protocol-vs-maximal-oxygen-uptake-in-an-incremental-testing-protocol-and-their-relationship-with-cross-country-mountain-biking-performance
#19
Rafał Hebisz, Paulina Hebisz, Marek Zatoń, Kamil Michalik
In the literature, the exercise capacity of cyclists is typically assessed using incremental and endurance exercise tests. The aim of the present study was to confirm whether peak oxygen uptake (V̇O2peak) attained in a sprint interval testing protocol correlates with cycling performance, and whether it corresponds to maximal oxygen uptake (V̇O2max) determined by an incremental testing protocol. A sample of 28 trained mountain bike cyclists executed 3 performance tests: (i) incremental testing protocol (ITP) in which the participant cycled to volitional exhaustion, (ii) sprint interval testing protocol (SITP) composed of four 30 s maximal intensity cycling bouts interspersed with 90 s recovery periods, (iii) competition in a simulated mountain biking race...
April 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28103737/a-multidimensional-approach-to-performance-prediction-in-olympic-distance-cross-country-mountain-bikers
#20
Andrew R Novak, Kyle J M Bennett, Job Fransen, Ben J Dascombe
This study adopted a multidimensional approach to performance prediction within Olympic distance cross-country mountain biking (XCO-MTB). Twelve competitive XCO-MTB cyclists (VO2max 60.8 ± 6.7 ml · kg(-1)( )· min(-1)) completed an incremental cycling test, maximal hand grip strength test, cycling power profile (maximal efforts lasting 6-600 s), decision-making test and an individual XCO-MTB time-trial (34.25 km). A hierarchical approach using multiple linear regression analyses was used to develop predictive models of performance across 10 circuit subsections and the total time-trial...
January 20, 2017: Journal of Sports Sciences
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