Thermal Poling of New Double-Hole Optical Fibers
Applied Sciences, 2019 Fused silica are common fiber materials which have macroscopic central symmetry without second-order nonlinearity. Studies have shown that thermal poling of fused silica fibers can destroy this macroscopic central symmetry, resulting in second-order ...
Shuilian Wang +5 more
doaj +4 more sources
Is There an Optimal Pole Length for Double Poling in Cross Country Skiing? [PDF]
Journal of Applied Biomechanics, 2017 The aim of this study was to determine the effects of pole length on energy cost and kinematics in cross country double poling. Seven sub-elite male athletes were tested using pole sets of different lengths (ranging between 77% and 98% of participants ...
Onasch, Franziska +2 more
core +3 more sources
Activity of Upper Body Muscles in Double Poling and Skierg Workout [PDF]
Baltic Journal of Sport and Health Sciences, 2018 Background. The aim of the study was to compare the involvement of upper body muscles during double poling and SkiErg Concept 2 workout and verify its specificity for cross-country skiing. Methods.
Roman Horyna +5 more
doaj +2 more sources
Communications in KinesiologyA technique with increasing utilization in Nordic ski competition is double poling, in which the skier stands in set tracks and applies force to both poles during forward torso rotation (poling phase) followed by a return to upright posture (recovery ...
Riley N. Kuczma +6 more
doaj +3 more sources
Artificially induced altitudes aerobic and anaerobic performance differences on double-poling ergometer in elite young cross-country skiers [version 2; peer review: 1 approved, 2 approved with reservations] [PDF]
F1000ResearchBackground Among the key factors for cross-country skier training are high altitude training and strength in double-polling, because has recently been used not only for long-distance races but also for World cup.
Jiří Suchý +6 more
doaj +2 more sources
Stronger Is Better: The Impact of Upper Body Strength in Double Poling Performance [PDF]
Frontiers in Physiology, 2019 The purpose of the present study was to compare time results from a roller-skiing double poling (DP) time trial with different physiological variables, muscular strength variables, and DP characteristics in both male and female young competitive skiers ...
Arnstein Sunde +7 more
doaj +2 more sources
In Vivo hip joint loading during cross-country skiing on a simulator [PDF]
Frontiers in Bioengineering and BiotechnologyBackgroundReturn to sports following total hip arthroplasty (THA) is important to an increasingly younger and active clientele. However, knowledge about in vivo joint forces during sports is scarce and often only estimated.
Daniela Aschenbrenner +16 more
doaj +2 more sources
Sex differences in speed and sub-technique selection in elite sprint cross-country skiers: a time-trial qualification analysis [PDF]
Frontiers in Sports and Active LivingPurposeThis study investigated sex differences in speed, sub-technique selection and cycle characteristics during a sprint cross-country skiing time-trial qualification in the classical style.MethodsThirty elite- to world-class cross-country skiers (15 ...
Øyvind Sandbakk +4 more
doaj +2 more sources
Influence of Hypoxic Interval Training and Hyperoxic Recovery on Muscle Activation and Oxygenation in Connection with Double-Poling Exercise. [PDF]
PLoS ONE, 2015 Here, we evaluated the influence of breathing oxygen at different partial pressures during recovery from exercise on performance at sea-level and a simulated altitude of 1800 m, as reflected in activation of different upper body muscles, and oxygenation ...
Christoph Zinner +5 more
doaj +2 more sources
Maximal aerobic and anaerobic power and time performance in 800 m double poling ergometer [PDF]
European Journal of Applied Physiology, 2023 Jan-Michaél Johansen +2 more
exaly +2 more sources