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https://www.readbyqxmd.com/read/29226382/substantial-injuries-influence-ranking-position-in-young-elite-athletes-of-athletics-cross-country-skiing-orienteering
#1
Philip von Rosen, Annette Heijne
The relationship between injury and performance in young athletes is scarcely studied. The aim of this study was therefore to explore the association between injury prevalence and ranking position among adolescent elite athletes. 162 male and female adolescent elite athletes (age range 15-19), competing in athletics (n=59), cross-country skiing (n=66) and orienteering (n=37), were monitored weekly over 22-47 weeks using a web-based injury questionnaire. Ranking lists were collected. A significant (p=.003) difference was found in the seasonal substantial injury prevalence across the ranked athletes over the season, where the top-ranked (median 3...
December 11, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29199781/velocity-distribution-of-women-s-30-km-cross-country-skiing-during-olympic-games-from-2002-2014
#2
Wlodzimierz S Erdmann, Dorota Dancewicz-Nosko, Vasilios Giovanis
BACKGROUND: Within several investigated endurance sport disciplines the distribution of load of the best competitors has a manner of evenly or slightly rising velocity values. Unfortunately many other competitors have usually diminishing values or when they are very poor they have evenly values. The aim of this study was to investigate distribution of velocity within 30-km cross-country female skiers. METHODS: Cross-country skiing runs were investigated of Olympic Games 2002-2014 (Salt Lake City, Turin, Vancouver, Sochi)...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29196845/pole-lengths-influence-o2-cost-during-double-poling-in-highly-trained-cross-country-skiers
#3
Camilla Høivik Carlsen, Bjarne Rud, Håvard Myklebust, Thomas Losnegard
PURPOSE: In elite cross-country skiing, double poling is used in different terrain. This study compared O2-cost and kinematics during double poling with four different pole lengths [self-selected (SS), SS - 5 cm, SS + 5 cm, SS + 10 cm] at Low versus Moderate incline. METHODS: Thirteen highly trained male cross-country skiers (mean ± SD 23 ± 3 years; 182 ± 4 cm; 77 ± 6 kg) completed eight submaximal trials with roller skis on a treadmill at two conditions: "Low incline" (1...
December 1, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29181259/injury-patterns-in-adolescent-elite-endurance-athletes-participating-in-running-orienteering-and-cross-country-skiing
#4
Philip von Rosen, Frida Floström, Anna Frohm, Annette Heijne
Background: Prospective injury registration studies, monitoring adolescent elite athletes, are sparse in running, orienteering and cross-country skiing, yet essential for developing prevention programs. Purpose: The aims of this study were to describe the injury prevalence/incidence, severity grade, injury location, risk factors and the prevalence of illness in running (RU), orienteering (OR) and cross-country skiing athletes (CR). Study Design: Prospective cohort study...
October 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29141496/power-and-pacing-calculations-based-on-real-time-locating-data-from-a-cross-country-skiing-sprint-race
#5
Mikael Swarén, Anders Eriksson
Pacing strategies in cross-country skiing have been investigated in several studies. However, none of the previous studies have been verified by collected skiing data giving the skiing velocities along a measured track. These can be used to calculate the propulsive power output. Collected real-time positioning data from a cross-country sprint skiing race were used to estimate the propulsive power by applying a power balance model. Analyses were made for the time-trial and the final for one female and one male skier...
November 15, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29117228/the-pacing-strategy-and-technique-of-male-cross-country-skiers-with-different-levels-of-performance-during-a-15-km-classical-race
#6
Boye Welde, Thomas L Stöggl, Gunnar E Mathisen, Matej Supej, Chiara Zoppirolli, Andreas K Winther, Barbara Pellegrini, Hans-Christer Holmberg
In this study the pacing strategy, cycle characteristics and choice of technique of elite male cross-country (XC) skiers during a three-lap, 15-km classical race with interval start were measured. During the Norwegian Championships in 2016, fast (n = 18, age: 26±4 yr; height: 182±4 cm; body mass: 78±3 kg (means±SD)) and slow skiers (n = 18, age: 22±2 yr; height: 183±5 cm; body mass: 78±6 kg) were video recorded on flat (0°), intermediate (3.5°) and uphill sections (7.1°) of the first and final laps...
2017: PloS One
https://www.readbyqxmd.com/read/29024041/strength-training-improves-double-poling-performance-after-prolonged-submaximal-exercise-in-cross-country-skiers
#7
S Øfsteng, Ø Sandbakk, M van Beekvelt, D Hammarström, R Kristoffersen, J Hansen, G Paulsen, B R Rønnestad
The purpose of this study was to investigate the effects of adding strength training with or without vibration to cross-country (XC) skiers' endurance training on double poling (DP) performance, physiological and kinematic adaptations. Twenty-one well-trained male XC skiers combined endurance- and upper-body strength-training three times per week, either with (n=11) or without (n=10) superimposed vibrations for 8 weeks, whereas eight skiers performed endurance training only (CON). Testing included 1RM in upper-body exercises, work economy, neural activation, oxygen saturation in muscle and DP kinematics during a prolonged submaximal DP roller ski test which was directly followed by a time to exhaustion (TTE) test...
October 10, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28950695/pacing-profiles-in-age-group-cross-country-skiers-in-the-vasaloppet-2012-2016
#8
Pantelis T. Nikolaidis, Beat Knechtle
Little is known for pacing profiles in age groups cross-country skiers. The aim of the present study was to examine the effect of sex, age and calendar year on pacing strategies in the largest ski marathon in the world. All finishers (n = 66,435) in ‘Vasaloppet’ from 2012 to 2016 were examined for 12 different age groups (G). There was an association between age group and sex (χ² = 1091.1, P < 0.001; Cramer’s V = 0.13, P < 0.001), where the men-to-women ratio in each age group ranged from 3.29 (in G₂₀) to 64...
October 31, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28921697/cross-country-skiing-is-associated-with-lower-all-cause-mortality-a-population-based-follow-up-study
#9
Jari A Laukkanen, Tanjaniina Laukkanen, Setor K Kunutsor
OBJECTIVES: The prospective relationship between leisure time cross-country skiing and any fatal events is uncertain. We aimed to assess the associations of leisure time cross-country skiing habits with the risk of all-cause mortality in a general population. METHODS: A 12-month physical activity questionnaire was used at baseline to assess the frequency, average duration, and intensity of cross-country skiing in a prospective population-based cohort of 2,087 middle-aged men from Eastern Finland...
September 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28912656/do-maximal-roller-skiing-speed-and-double-poling-performance-predict-youth-cross-country-skiing-performance
#10
Roland Stöggl, Erich Müller, Thomas Stöggl
The aims of the current study were to analyze whether specific roller skiing tests and cycle length are determinants of youth cross-country (XC) skiing performance, and to evaluate sex specific differences by applying non-invasive diagnostics. Forty-nine young XC skiers (33 boys; 13.8 ± 0.6 yrs and 16 girls; 13.4 ± 0.9 yrs) performed roller skiing tests consisting of both shorter (50 m) and longer durations (575 m). Test results were correlated with on snow XC skiing performance (PXC) based on 3 skating and 3 classical distance competitions (3 to 6 km)...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28904979/the-russians-are-the-fastest-in-marathon-cross-country-skiing-the-engadin-ski-marathon
#11
Pantelis Theodoros Nikolaidis, Jan Heller, Beat Knechtle
It is well known that athletes from a specific region or country are dominating certain sports disciplines such as marathon running or Ironman triathlon; however, little relevant information exists on cross-country skiing. Therefore, the aim of the present study was to investigate the aspect of region and nationality in one of the largest cross-country skiing marathons in Europe, the "Engadin Ski Marathon." All athletes (n = 197,125) who finished the "Engadin Ski Marathon" between 1998 and 2016 were considered...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28899914/military-training-elicits-marked-increases-in-plasma-metabolomic-signatures-of-energy-metabolism-lipolysis-fatty-acid-oxidation-and-ketogenesis
#12
J Philip Karl, Lee M Margolis, Nancy E Murphy, Christopher T Carrigan, John W Castellani, Elisabeth H Madslien, Hilde-Kristin Teien, Svein Martini, Scott J Montain, Stefan M Pasiakos
Military training studies provide unique insight into metabolic responses to extreme physiologic stress induced by multiple stressor environments, and the impacts of nutrition in mediating these responses. Advances in metabolomics have provided new approaches for extending current understanding of factors modulating dynamic metabolic responses in these environments. In this study, whole-body metabolic responses to strenuous military training were explored in relation to energy balance and macronutrient intake by performing nontargeted global metabolite profiling on plasma collected from 25 male soldiers before and after completing a 4-day, 51-km cross-country ski march that produced high total daily energy expenditures (25...
September 2017: Physiological Reports
https://www.readbyqxmd.com/read/28821900/erratum-to-sitting-position-affects-performance-in-cross-country-sit-skiing
#13
M Lund Ohlsson, M S Laaksonen
No abstract text is available yet for this article.
August 19, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28810170/the-role-of-speed-and-incline-in-the-spontaneous-choice-of-technique-in-classical-roller-skiing
#14
Gertjan Ettema, Espen Kveli, Magne Øksnes, Øyvind Sandbakk
Cross-country skiers change technique depending on terrain (incline) and effort (work rate; speed at a particular incline or resistance). The literature is not unequivocal about the influence of incline or speed on the choice of technique, i.e., which of these act as a 'control parameter'. Identifying task related control parameters for spontaneous technique shifts assists elucidating which mechanisms are active for triggering technique transitions. The aim of this study was to investigate whether speed or incline acted as such control parameter for technique shifts during classic style roller skiing...
August 12, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28804521/home-advantage-in-the-winter-paralympic-games-1976-2014
#15
Darryl Wilson, Girish Ramchandani
PURPOSE: There is a limited amount of home advantage research concerned with winter sports. There is also a distinct lack of studies that investigate home advantage in the context of para sport events. This paper addresses this gap in the knowledge by examining home advantage in the Winter Paralympic Games. METHODS: Using a standardised measure of success, we compared the performances of host nations at home with their own performances away from home between 1976 and 2014...
2017: Sport Sciences for Health
https://www.readbyqxmd.com/read/28782598/physiological-and-performance-effects-of-nitrate-supplementation-during-roller-skiing-in-normoxia-and-normobaric-hypoxia
#16
Linn Nybäck, Caroline Glännerud, Gustav Larsson, Eddie Weitzberg, Oliver Michael Shannon, Kerry McGawley
The present study examined the effects of acute nitrate (NO3(-)) supplementation ingested in the form of concentrated beetroot juice on cross-country roller-ski performance in normoxia (N) and normobaric hypoxia (H). Eight competitive cross-country skiers (five males: age 22 ± 3 years, V·O2max 71.5 ± 4.7 mL kg(-1)·min(-1); three females: age 21 ± 1 years, V·O2max 58.4 ± 2.5 mL kg(-1)·min(-1)) were supplemented with a single dose of NO3(-)-rich beetroot juice (BRJ, ∼13 mmol NO3(-)) or a NO3(-)-depleted placebo (PL, ∼0 mmol NO3(-)) and performed 2 x 6-min submaximal exercise bouts and a 1000-m time-trial (TT) on a treadmill in N (20...
August 4, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28771061/comparison-of-performance-levels-and-sex-on-sprint-race-performance-in-the-biathlon-world-cup
#17
Harri Luchsinger, Jan Kocbach, Gertjan Ettema, Øyvind Sandbakk
Biathlon is an Olympic sport combining cross-country skiing with the skating technique and rifle shooting. The sprint (7.5 km for women and 10 km for men) includes two shootings between the three laps of skiing. The aims of the current study are to compare biathletes of different performance-levels and sex on total race time and performance-determining factors of sprint races in the biathlon World Cup. The top 10-performers (G1-10) and results within rank 21-30 (G21-30) in 47 sprint races during the 2011/2012 to 2015/2016 World Cup seasons were compared regarding total race time, course time, shooting time, range time, shooting performance (rate of hits) and penalty time...
August 3, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28763504/full-course-macro-kinematic-analysis-of-a-10-km-classical-cross-country-skiing-competition
#18
Finn Marsland, Colin Mackintosh, Hans-Christer Holmberg, Judith Anson, Gordon Waddington, Keith Lyons, Dale Chapman
In this study micro-sensors were employed to analyse macro-kinematic parameters during a classical cross-country skiing competition (10 km, 2-lap). Data were collected from eight male participants during the Australian championship competition wearing a single micro-sensor unit (MinimaxX™, S4) positioned on their upper back. Algorithms and visual classification were used to identify skiing sub-techniques and calculate velocities, cycle lengths (CL) and cycle rates (CR) over the entire course. Double poling (DP) was the predominant cyclical sub-technique utilised (43 ± 5% of total distance), followed by diagonal stride (DS, 16 ± 4%) and kick double poling (KDP, 5 ± 4%), with the non-propulsive Tuck technique accounting for 24 ± 4% of the course...
2017: PloS One
https://www.readbyqxmd.com/read/28662163/association-between-laboratory-capacities-and-world-cup-performance-in-nordic-combined
#19
Vegard Rasdal, Ronny Fudel, Jan Kocbach, Frode Moen, Gertjan Ettema, Øyvind Sandbakk
BACKGROUND: Nordic combined (NC) is an Olympic winter-sport performed as a ski jumping (SJ) event followed by a cross-country (XC) pursuit race employing the skating style. PURPOSE: To elucidate the associations between sport-specific laboratory capacities and SJ, XC skiing, and overall NC performance in a world-cup NC event. METHODS: Twelve international world-cup NC athletes from 8 nations performed laboratory testing one day prior to participating in a world-cup NC event...
2017: PloS One
https://www.readbyqxmd.com/read/28659826/no-additional-benefits-of-block-over-evenly-distributed-high-intensity-interval-training-within-a-polarized-microcycle
#20
Kerry McGawley, Elisabeth Juudas, Zuzanna Kazior, Kristoffer Ström, Eva Blomstrand, Ola Hansson, Hans-Christer Holmberg
Introduction: The current study aimed to investigate the responses to block- versus evenly-distributed high-intensity interval training (HIT) within a polarized microcycle. Methods: Twenty well-trained junior cross-country skiers (10 males, age 17.6 ± 1.5 and 10 females, age 17.3 ± 1.5) completed two, 3-week periods of training (EVEN and BLOCK) in a randomized, crossover-design study. In EVEN, 3 HIT sessions (5 × 4-min of diagonal-stride roller-skiing) were completed at a maximal sustainable intensity each week while low-intensity training (LIT) was distributed evenly around the HIT...
2017: Frontiers in Physiology
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