keyword
MENU ▼
Read by QxMD icon Read
search

Ski Simulator

keyword
https://www.readbyqxmd.com/read/28627406/multi-omics-facilitated-variable-selection-in-cox-regression-model-for-cancer-prognosis-prediction
#1
Cong Liu, Xujun Wang, Georgi Z Genchev, Hui Lu
Motivation New developments in high-throughput genomic technologies have enabled the measurement of diverse types of omics biomarkers in a cost-efficient and clinically-feasible manner. Developing computational methods and tools for analysis and translation of such genomic data into clinically-relevant information is an ongoing and active area of investigation. For example, several studies have utilized an unsupervised learning framework to cluster patients by integrating omics data. Despite such recent advances, predicting cancer prognosis using integrated omics biomarkers remains a challenge...
June 13, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28564745/cardiorespiratory-responses-of-adults-and-children-during-normoxic-and-hypoxic-exercise
#2
Jernej Kapus, Igor B Mekjavic, Adam C McDonnell, Anton Ušaj, Janez Vodičar, Peter Najdenov, Miroljub Jakovljević, Polona Jaki Mekjavić, Milan Žvan, Tadej Debevec
We aimed to elucidate potential differential effects of hypoxia on cardiorespiratory responses during submaximal cycling and simulated skiing exercise between adults and pre-pubertal children. Healthy, low-altitude residents (adults, N=13, Age=40±4yrs.; children, N=13, age=8±2yrs.) were tested in normoxia (Nor: PiO2=134±0.4 mmHg; 940 m) and normobaric hypoxia (Hyp: PiO2=105±0.6 mmHg; ~3 000 m) following an overnight hypoxic acclimation (≥12-hrs). On both days, the participants underwent a graded cycling test and a simulated skiing protocol...
May 31, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28513243/performance-of-alpine-touring-boots-when-used-in-alpine-ski-bindings
#3
Jeffrey R Campbell, Irving S Scher, David Carpenter, Bruce L Jahnke, Randal P Ching
Alpine Touring (AT) equipment is designed for ascending mountains and snow skiing down backcountry terrain. Skiers have been observed using AT boots in alpine (not made for Alpine Touring) ski bindings. We tested the effect on the retention-release characteristics of AT boots used in alpine bindings. Ten AT ski boots and five alpine ski boots were tested in eight models of alpine ski bindings using an ASTM F504-05 (2012) apparatus. 31% of the AT boots released appropriately when used in alpine ski bindings...
May 17, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28508404/changes-in-biomechanics-of-skiing-at-maximal-velocity-caused-by-simulated-20-km-skiing-race-using-v2-skating-technique
#4
O Ohtonen, S J Lindinger, C Göpfert, W Rapp, V Linnamo
This study investigated how the fatigue caused by a 20-km simulated skating cross-country skiing race on snow affects the final spurt performance from a biomechanical perspective. Subjects performed a 100-m maximal skiing trial before and at the end of the simulated race. Cycle characteristics, ground reaction forces from skis and poles, and muscle activity from eight muscles were recorded during each trial. Results showed that subjects were in a fatigued state after the simulated race manifested by 11.6% lower skiing speed (P<...
May 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28155690/high-dimensional-omics-data-analysis-using-a-variable-screening-protocol-with-prior-knowledge-integration-ski
#5
Cong Liu, Jianping Jiang, Jianlei Gu, Zhangsheng Yu, Tao Wang, Hui Lu
BACKGROUND: High-throughput technology could generate thousands to millions biomarker measurements in one experiment. However, results from high throughput analysis are often barely reproducible due to small sample size. Different statistical methods have been proposed to tackle this "small n and large p" scenario, for example different datasets could be pooled or integrated together to provide an effective way to improve reproducibility. However, the raw data is either unavailable or hard to integrate due to different experimental conditions, thus there is an emerging need to develop a method for "knowledge integration" in high-throughput data analysis...
December 23, 2016: BMC Systems Biology
https://www.readbyqxmd.com/read/28076389/a-computational-study-on-the-relation-between-resting-heart-rate-and-atrial-fibrillation-hemodynamics-under-exercise
#6
Matteo Anselmino, Stefania Scarsoglio, Andrea Saglietto, Fiorenzo Gaita, Luca Ridolfi
AIMS: Clinical data indicating a heart rate (HR) target during rate control therapy for permanent atrial fibrillation (AF) and assessing its eventual relationship with reduced exercise tolerance are lacking. The present study aims at investigating the impact of resting HR on the hemodynamic response to exercise in permanent AF patients by means of a computational cardiovascular model. METHODS: The AF lumped-parameter model was run to simulate resting (1 Metabolic Equivalent of Task-MET) and various exercise conditions (4 METs: brisk walking; 6 METs: skiing; 8 METs: running), considering different resting HR (70 bpm for the slower resting HR-SHR-simulations, and 100 bpm for the higher resting HR-HHR-simulations)...
2017: PloS One
https://www.readbyqxmd.com/read/28052386/ecosystem-engineers-drive-creek-formation-in-salt-marshes
#7
Huy D Vu, Kazimierz Wie Ski, Steven C Pennings
Ecosystem engineers affect different organisms and processes in multiple ways at different spatial scales. Moreover, similar species may differ in their engineering effects for reasons that are not always clear. We examined the role of four species of burrowing crabs (Sesarma reticulatum, Eurytium limosum, Panopeus herbstii, Uca pugnax) in engineering tidal creek networks in salt marshes experiencing sea level rise. In the field, crab burrows were associated with heads of eroding creeks and the loss of plant (Spartina alterniflora) stems...
January 2017: Ecology
https://www.readbyqxmd.com/read/27889683/biomechanics-of-simulated-versus-natural-cross-country-sit-skiing
#8
V Rosso, L Gastaldi, W Rapp, S Lindinger, Y Vanlandewijck, V Linnamo
The purpose of this study was to investigate the biomechanics of cross-country sit-skiing in simulated and natural skiing. Thirteen international level athletes participated in a ski ergometer test (simulated conditions) and a test on snow in a ski-tunnel (natural conditions) using their personal sit-ski. Tests in both conditions were performed at individual maximal speed. When comparing the two conditions the main results were: (1) maximal speed in simulated conditions was lower (p<0.05) but correlated well with the natural condition (r=0...
February 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27743629/effect-of-posture-on-the-aerodynamic-characteristics-during-take-off-in-ski-jumping
#9
Keizo Yamamoto, Makoto Tsubokura, Jun Ikeda, Keiji Onishi, Sophie Baleriola
The purpose of this study was to investigate the effects of posture of a ski jumper on aerodynamic characteristics during the take-off using computational fluid dynamics (CFD). The CFD method adopted for this study was based on Large-Eddy Simulation. Body surface data were obtained by 3-D laser scanning of an active ski jumper. Based on video analysis of the actual take-off movement, two sets of motion data were generated (world-class jumper A and less-experienced jumper B). The inlet flow velocity that corresponds to the in-run velocity in actual ski jumping was set to 23...
October 6, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27458775/effect-of-ski-boot-rear-stiffness-sbrs-on-maximal-acl-force-during-injury-prone-landing-movements-in-alpine-ski-racing-a-study-with-a-musculoskeletal-simulation-model
#10
Robert Eberle, Dieter Heinrich, Peter Kaps, Michael Oberguggenberger, Werner Nachbauer
A common anterior cruciate ligament (ACL) injury situation in alpine ski racing is landing back-weighted after a jump. Simulated back-weighted landing situations showed higher ACL-injury risk for increasing ski boot rear stiffness (SBRS) without considering muscles. It is well known that muscle forces affect ACL tensile forces during landing. The purpose of this study is to investigate the effect of different SBRS on the maximal ACL tensile forces during injury prone landings considering muscle forces by a two-dimensional musculoskeletal simulation model...
July 26, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27414686/metabolic-responses-and-pacing-strategies-during-successive-sprint-skiing-time-trials
#11
Erik Andersson, Hans-Christer Holmberg, Niels Ørtenblad, Glenn Björklund
PURPOSE: To examine the metabolic responses and pacing strategies during the performance of successive sprint time trials (STTs) in cross-country skiing. METHODS: Ten well-trained male cross-country skiers performed four self-paced 1300-m STTs on a treadmill, each separated by 45 min of recovery. The simulated STT course was divided into three flat (1°) sections (S1, S3 and S5) involving the double poling sub-technique interspersed with two uphill (7°) sections (S2 and S4) involving the diagonal stride sub-technique...
July 12, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27304840/contribution-of-direct-and-indirect-exposure-to-human-serum-concentrations-of-perfluorooctanoic-acid-in-an-occupationally-exposed-group-of-ski-waxers
#12
Melissa I Gomis, Robin Vestergren, Helena Nilsson, Ian T Cousins
The contribution of direct (i.e., uptake of perfluorooctanoic acid (PFOA) itself) and indirect (i.e., uptake of 8:2 fluorotelomer alcohol (FTOH) and metabolism to PFOA) exposure to PFOA serum concentrations was investigated using a dynamic one-compartment pharmacokinetic (PK) model. The PK model was applied to six occupationally exposed ski waxers for whom direct and indirect exposures via inhalation were characterized using multiple measurements with personal air sampling devices. The model was able to predict the diverging individual temporal trends of PFOA in serum with correlation coefficients of 0...
July 5, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27065556/cardiorespiratory-endurance-evaluation-using-heart-rate-analysis-during-ski-simulator-exercise-and-the-harvard-step-test-in-elementary-school-students
#13
Hyo Taek Lee, Hyo Lyun Roh, Yoon Sang Kim
[Purpose] Efficient management using exercise programs with various benefits should be provided by educational institutions for children in their growth phase. We analyzed the heart rates of children during ski simulator exercise and the Harvard step test to evaluate the cardiopulmonary endurance by calculating their post-exercise recovery rate. [Subjects and Methods] The subjects (n = 77) were categorized into a normal weight and an overweight/obesity group by body mass index. They performed each exercise for 3 minutes...
January 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27065554/kinematic-characteristics-of-the-lower-extremity-during-a-simulated-skiing-exercise-in-healthy-participants
#14
Hyo Taek Lee, Hyo Lyun Roh, Yoon Sang Kim
[Purpose] Currently, various simulators are produced and used for athlete's exercise, rehabilitation, and training. In this study, we analyzed the kinematic factors of sectional and total movements in healthy participants by providing group-dependent information during simulated exercise. [Subjects and Methods] Participants in this study included 26 male adults (non-experts and experts); experts held a certificate issued by the Korea Ski Instructors Association. The elapsed times in each phase, the difference in the lower extremity angles, and muscle activity were computed through analysis of kinematic factors...
January 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27028127/optimal-slopes-and-speeds-in-uphill-ski-mountaineering-a-laboratory-study
#15
Caroline Praz, Benedikt Fasel, Philippe Vuistiner, Kamiar Aminian, Bengt Kayser
PURPOSE: The purpose of this study was to estimate the energy cost of linear (EC) and vertical displacement (ECvert), mechanical efficiency and main stride parameters during simulated ski mountaineering at different speeds and gradients, to identify an optimal speed and gradient that maximizes performance. METHODS: 12 subjects roller skied on a treadmill at three different inclines (10, 17 and 24 %) at three different speeds (approximately 70, 80 and 85 % of estimated peak heart rate)...
May 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/26923666/energy-system-contributions-and-determinants-of-performance-in-sprint-cross-country-skiing
#16
E Andersson, G Björklund, H-C Holmberg, N Ørtenblad
To improve current understanding of energy contributions and determinants of sprint-skiing performance, 11 well-trained male cross-country skiers were tested in the laboratory for VO2max , submaximal gross efficiency (GE), maximal roller skiing velocity, and sprint time-trial (STT) performance. The STT was repeated four times on a 1300-m simulated sprint course including three flat (1°) double poling (DP) sections interspersed with two uphill (7°) diagonal stride (DS) sections. Treadmill velocity and VO2 were monitored continuously during the four STTs and data were averaged...
February 29, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/26724833/effects-of-one-versus-two-bouts-of-moderate-intensity-physical-activity-on-selective-attention-during-a-school-morning-in-dutch-primary-schoolchildren-a-randomized-controlled-trial
#17
RANDOMIZED CONTROLLED TRIAL
Teatske M Altenburg, Mai J M Chinapaw, Amika S Singh
OBJECTIVES: Evidence suggests that physical activity is positively related to several aspects of cognitive functioning in children, among which is selective attention. To date, no information is available on the optimal frequency of physical activity on cognitive functioning in children. The current study examined the acute effects of one and two bouts of moderate-intensity physical activity on children's selective attention. DESIGN: Randomized controlled trial (ISRCTN97975679)...
October 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/26664282/multi-axis-prosthetic-knee-resembles-alpine-skiing-movements-of-an-intact-leg
#18
Ivan Demšar, Jože Duhovnik, Blaž Lešnik, Matej Supej
The purpose of the study was to analyse the flexion angles of the ski boot, ankle and knee joints of an above-knee prosthesis and to compare them with an intact leg and a control group of skiers. One subject with an above-knee amputation of the right leg and eight healthy subjects simulated the movement of a skiing turn by performing two-leg squats in laboratory conditions. By adding additional loads in proportion to body weight (BW; +1/3 BW, +2/3 BW, +3/3 BW), various skiing regimes were simulated. Change of Flexion Angle (CoFA) and Range of Motion (RoM) in the ski boot, ankle and knee joints were calculated and compared...
December 2015: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/26357449/effect-of-ski-simulator-training-on-kinematic-and-muscle-activation-of-the-lower-extremities
#19
Jeheon Moon, Dohoon Koo, Kitae Kim, Insik Shin, Hyeyoung Kim, Jinhae Kim
[Purpose] This study aimed to verify the effectiveness of an augmented reality-based ski simulator through analyzing the changes in movement patterns as well as the engagement of major muscles of the lower body. [Subjects] Seven subjects participated in the study. All were national team-level athletes studying at "K" Sports University in Korea who exhibited comparable performance levels and had no record of injuries in the preceding 6 months (Age 23.4 ± 3.8 years; Height 172.6 ± 12.1 cm; Weight 72.3 ± 16...
August 2015: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/26316418/effects-of-carbohydrate-dose-and-frequency-on-metabolism-gastrointestinal-discomfort-and-cross-country-skiing-performance
#20
B Stocks, J A Betts, K McGawley
This study investigated carbohydrate ingestion of varied doses and frequencies during a simulated cross-country skiing time trial. Ten men and three women (age: 30 ± 7 years; V ˙ O 2 m a x : 59.6 ± 5.7 mL/kg/min) completed four, 30-km classic technique roller skiing time trials on a treadmill. A 1:1 maltodextrin-fructose carbohydrate solution was provided at high (2.4 g/min; HC) and moderate (1.2 g/min; MC) ingestion rates, each at high (six feeds; HF) and low (two feeds; LF) frequencies. In the LF trials, blood glucose was elevated following carbohydrate ingestion (at 4 and 19 km) but was reduced at 14 and 29 km compared with HF strategies (P ≤ 0...
September 2016: Scandinavian Journal of Medicine & Science in Sports
keyword
keyword
78069
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"