keyword
https://read.qxmd.com/read/38528144/skiing-economy-and-kinematic-during-a-field-double-poling-roller-skiing-among-novice-and-experienced-cross-country-skiers
#1
JOURNAL ARTICLE
Yang Zhu, Zhiqiang Wang, Ruoyang Li, Yanyan Li, Peng Bai, Weifeng Gao, Yaping Zhong
To assess the skiing economy (SE) and kinematics during double poling (DP) roller skiing between two groups of skiers in a field setting. Five experienced and five novice male skiers performed a SEDP test at 16 km∙h-1 on an outdoor athletics track. Gas exchange parameters were measured to determine SEDP . A two-dimensional video was filmed to measure the kinematics variables. Experienced skiers exhibited a 21% lower oxygen cost than novice skiers (p = 0.016) in DP, indicating a strong association between SEDP , cycle length and cycle rate (p < 0...
March 25, 2024: Scientific Reports
https://read.qxmd.com/read/38500548/changes-in-roller-skiing-economy-among-nordic-combined-athletes-leading-up-to-the-competition-season
#2
JOURNAL ARTICLE
Takuya Yanaka, Mariko Nakamura, Kaoru Yamanobe, Yusuke Ishige
The purpose of this study was to compare roller skiing economy during different training phases in Nordic combined (NC) athletes and determine the aerobic and anaerobic factors responsible for changes in skiing economy. Seven elite NC athletes underwent incremental load tests on a large buried treadmill in both spring and autumn using roller skis. Measurements included oxygen uptake, respiratory exchange ratio, and blood lactate concentration. Roller skiing economy was calculated from aerobic and anaerobic energy system contributions, and overall roller skiing economy was determined by combining the two...
2024: Frontiers in sports and active living
https://read.qxmd.com/read/38474946/comparative-analysis-of-the-diagonal-stride-technique-during-roller-skiing-and-on-snow-skiing-in-youth-cross-country-skiers
#3
JOURNAL ARTICLE
Mujia Ma, Shuang Zhao, Ting Long, Qingquan Song, Hans-Christer Holmberg, Hui Liu
Roller skiing is one primary form of training method as it is an off-snow equivalent to cross-country (XC) skiing during the dry land preseason training, but the results could only be applied to on-snow skiing with appropriate caution. The aim of this present study was to investigate the similarities and differences in roller skiing and on-snow skiing with the diagonal stride (DS) technique. Six youth (age: 14.3 ± 2.9 years) skiers participated in this study. Two high-definition video camcorders and FastMove 3D Motion 2...
February 22, 2024: Sensors
https://read.qxmd.com/read/38393417/effect-of-exercise-intensity-and-apnea-on-splenic-contraction-and-hemoglobin-increase-in-well-trained-cross-country-skiers
#4
JOURNAL ARTICLE
Hampus Lindblom, Frank Pernett, Erika Schagatay, Pontus Holmström
The human spleen acts as a reservoir for red blood cells, which is mobilized into the systemic circulation during various conditions such as hypoxia and physical exertion. Cross-country (XC) skiers, renowned for their exceptional aerobic capacity, are regularly exposed to high-intensity exercise and local oxygen deficits. We investigated a putative dose-dependent relationship between splenic contraction and concomitant hemoglobin concentration ([Hb]) elevation across four exercise intensities in well-trained XC skiers...
February 23, 2024: European Journal of Applied Physiology
https://read.qxmd.com/read/38300939/supplement-usage-and-doping-attitudes-in-elite-youth-sports-the-mediating-role-of-dietary-supplement-acceptance
#5
JOURNAL ARTICLE
Jan Åge Kristensen, Tommy Haugen, Yngvar Ommundsen
This study investigated whether dietary supplement acceptance mediated the relationship between supplement use and doping attitudes in youth sports. To this end, we employed a two-wave half-longitudinal design during a sports season (time point one [T1] to time point two [T2]). The sample consisted of 217 elite youth athletes (47% male; mean age = 16.98 years, standard deviation = 0.88) who competed in team sports (43%; N = 93; basketball, floorball, handball, and ice hockey) and individual sports (57%; N = 124; alpine skiing, biathlon, cross-country skiing, swimming, and tennis)...
2024: PloS One
https://read.qxmd.com/read/38251289/sports-participation-and-osteoarthritis-in-females-a-systematic-review
#6
REVIEW
Magnus Brent, Mikkel Bo Brent
Sports participation and the risk of osteoarthritis (OA) have been a concern for decades. Few research efforts have been dedicated to clarify this issue for females, although they are considered at greater risk of developing OA than males. In contrast, several reviews have established an association between sports participation and OA for males. The aim of the systematic review was to assess the association between OA and participation in popular sports for females. PubMed, Embase, and Google Scholar were searched and yielded 578 articles...
December 31, 2023: Sports
https://read.qxmd.com/read/38180004/a-taste-of-ambrosia-do-olympic-medalists-live-longer-than-olympic-losers
#7
JOURNAL ARTICLE
Anna Kovbasiuk, Leon Ciechanowski, Dariusz Jemielniak
OBJECTIVE: To investigate the longevity of a large sample of Olympic Games participants, considering the interaction between different types of sports and medal awards. METHODOLGY: Data scraping from Wikipedia and Wikidata allowed us to collect a sample of 102,993 famous athletes. We selected 20 of the most populated disciplines to make the groups comparable. We conducted a comparison of life duration on a subset of 17,194 elite athletes, predominantly male, dead at the time of analysis...
January 5, 2024: Scandinavian Journal of Public Health
https://read.qxmd.com/read/38140345/relative-energy-deficiency-in-sport-reds-indicators-in-male-adolescent-endurance-athletes-a-3-year-longitudinal-study
#8
JOURNAL ARTICLE
Thomas Birkedal Stenqvist, Anna Katarina Melin, Monica Klungland Torstveit
Longitudinal measurements of Relative Energy Deficiency in Sport (REDs) among adolescent male elite athletes are lacking. We aimed to monitor REDs indicators and their possible impact on performance in elite high-school cross-country skiing and biathlon athletes ( n = 13) (16.3 ± 0.4 years, 179.4 ± 7.6 cm, 63.6 ± 8.2 kg body mass (BM), and peak oxygen uptake (VO2peak ): 61.5 ± 5.3 mL/kg BM/min) every 6 months for 3 years. Protocols included assessments of energy availability (EA), body composition and bone mineral density (BMD), resting metabolic rate (RMR), disordered eating behavior, exercise addiction, VO2peak , and muscle strength...
December 12, 2023: Nutrients
https://read.qxmd.com/read/38112794/non-specific-and-ski-specific-performance-development-in-peri-pubertal-cross-country-skiers
#9
JOURNAL ARTICLE
Chiara Zoppirolli, Roberto Modena, Lorenzo Bortolan, Federico Schena, Barbara Pellegrini
PURPOSE: To evaluate non-specific and ski-specific performance development in male (M) and female (F) peri-pubertal cross-country skiers and to evaluate their relationship with cross-country skiing (XCS) performance and biological maturation within each age category and sex. METHODS: Twenty-one and 19 athletes under 14 and 16 years old, respectively (U14 and U16), were tested for biological maturation; non-specific speed, agility, strength, endurance, and balance; ski-specific speed, agility, and endurance...
December 19, 2023: European Journal of Applied Physiology
https://read.qxmd.com/read/38100499/relationship-between-methods-of-monitoring-training-load-and-physiological-indicators-changes-during-4-weeks-cross-country-skiing-altitude-training
#10
JOURNAL ARTICLE
Yichao Yu, Dongye Li, Yifan Lu, Jing Mi
This study aimed to: (i) analyze the load characteristics of 4 weeks cross-country skiing altitude training; (ii) analyze the relationships between methods of monitoring training load and physiological indicators changes of elite male Chinese cross-country skiers during this period. Practitioners collected load data during 4 weeks of altitude training camp. Participants performed maximal oxygen uptake, lactate threshold, body composition, and skierg power test before and after the training camp to investigate the changes in physiological performance...
2023: PloS One
https://read.qxmd.com/read/38017144/effects-of-poling-camber-angle-on-the-biomechanics-of-cross-country-sit-skiing
#11
JOURNAL ARTICLE
Yuan Tian, Xue Chen, Yujie Liu, Gang Sun, Zhixiong Zhou, Chenglin Liu, Bo Huo
Cross-country sit-skiers use double poling (DP) technique to drive the slide. The aim of this study is to analyze how poling camber angle affect the capacity of power output and biomechanical parameters of the DP process. Twenty-four non-disabled college students (24.67 ± 1.46 years old) were recruited to perform three successive 30-s maximal effort tests with different poling camber angles of 0°, 15°, 24° and 30° using a sit-skiing ergometer. The biomechanical parameters, output power and muscle activation of the subjects were analyzed...
November 28, 2023: Scientific Reports
https://read.qxmd.com/read/38015538/ppara-and-il6-exploring-associations-with-athletic-performance-and-genotype-polymorphism
#12
JOURNAL ARTICLE
Derya Kazancı, Tolga Polat, Ömer Kaynar, Muhammet Fatih Bilici, Beste Tacal Aslan, Korkut Ulucan
This study aims to investigate the Interleukin (IL)-6 rs1800795 and peroxisome proliferator-activated receptor alpha (PPARA) rs4253778 polymorphism distributions in the relatively faster and slower subgroups of national cross-country skiing athletes and to identify advantageous genotypes for endurance performance. IL-6 is an inflammatory mediator that is effective in muscle tissue hypertrophy, repair, and the immune system. On the other hand, PPARA transcription factor is a molecule associated with fatty acid, sugar metabolism and inflammation formation...
November 15, 2023: Cellular and Molecular Biology
https://read.qxmd.com/read/37964776/the-proportional-distribution-of-training-by-elite-endurance-athletes-at-different-intensities-during-different-phases-of-the-season
#13
REVIEW
Billy Sperlich, Manuel Matzka, Hans-Christer Holmberg
The present review examines retrospective analyses of training intensity distribution (TID), i.e., the proportion of training at moderate (Zone 1, Z1), heavy (Z2) and severe (Z3) intensity by elite-to-world-class endurance athletes during different phases of the season. In addition, we discuss potential implications of our findings for research in this field, as well as for training by these athletes. Altogether, we included 175 TIDs, of which 120 quantified exercise intensity on the basis of heart rate and measured time-in-zone or employed variations of the session goal approach, with demarcation of zones of exercise intensity based on physiological parameters...
2023: Frontiers in sports and active living
https://read.qxmd.com/read/37948036/perspectives-on-concurrent-strength-and-endurance-training-in-healthy-adult-females-a-systematic-review
#14
Ritva S Mikkonen, Johanna K Ihalainen, Anthony C Hackney, Keijo Häkkinen
BACKGROUND: Both strength and endurance training are included in global exercise recommendations and are the main components of training programs for competitive sports. While an abundance of research has been published regarding concurrent strength and endurance training, only a small portion of this research has been conducted in females or has addressed their unique physiological circumstances (e.g., hormonal profiles related to menstrual cycle phase, menstrual dysfunction, and hormonal contraceptive use), which may influence training responses and adaptations...
November 10, 2023: Sports Medicine
https://read.qxmd.com/read/37931616/performance-determining-variables-of-a-simulated-sprint-cross-country-skiing-competition
#15
JOURNAL ARTICLE
Rune Kjøsen Talsnes, Jan-Magnus Brattebø, Tore Berdal, Trine Seeberg, Knut Skovereng, Thomas Losnegard, Jan Kocbach, Øyvind Sandbakk
PURPOSE: To investigate performance-determining variables of an on-snow sprint cross-country skiing competition and the evolvement in their relationship with performance as the competition progresses from the individual time trial (TT) to the final. METHODS: Sixteen national-level male junior skiers (mean [SD] age, 18.6 [0.8] y; peak oxygen uptake [VO2peak], 67.6 [5.5] mL·min-1·kg-1) performed a simulated sprint competition (1.3 km) in the skating style, comprising a TT followed by 3 finals (quarterfinals, semifinals, and final) completed by all skiers...
November 6, 2023: International Journal of Sports Physiology and Performance
https://read.qxmd.com/read/37917966/annual-volume-and-distribution-of-physical-training-in-norwegian-female-cross-country-skiers-and-biathletes-a-comparison-between-sports-competition-levels-and-age-categories-the-fendura-project
#16
JOURNAL ARTICLE
John O Osborne, Guro S Solli, Tina P Engseth, Boye Welde, Bente Morseth, Dionne A Noordhof, Øyvind Sandbakk, Erik P Andersson
PURPOSE: To describe and compare the annual physical training characteristics between Norwegian female cross-country (XC) skiers and biathletes across competition levels and age categories. METHODS: Daily training sessions for 1 year were recorded for 45 XC skiers and 26 biathletes, comprising international/national team (inter[national]) and nonnational/regional team members (nonnational) of both junior and senior age. Endurance, strength, flexibility, speed, and power training sessions were recorded...
October 11, 2023: International Journal of Sports Physiology and Performance
https://read.qxmd.com/read/37875331/olympic-games-during-nationwide-lockdown-sports-injuries-and-illnesses-including-covid-19-at-the-beijing-2022-winter-olympics
#17
JOURNAL ARTICLE
Torbjørn Soligard, Debbie Palmer, Kathrin Steffen, Alexandre Dias Lopes, Natalia Grek, Xuan He, Yan Wang, Marie-Elaine Grant, Brett G Toresdahl, Matthias Gilgien, Richard Budgett, Lars Engebretsen
OBJECTIVE: The objective of this study is to describe the incidence of injuries and illnesses sustained during the Beijing Winter Olympic Games from 4 February 2022 to 20 February 2022. METHODS: We recorded the daily number of athlete injuries and illnesses (1) through the reporting of all National Olympic Committee (NOC) medical teams and (2) in the polyclinic and medical venues by the Beijing 2022 medical staff. RESULTS: In total, 2848 athletes (1276 women, 45%; 1572 men, 55%) from 91 NOCs were followed prospectively for the occurrence of injury and illness...
October 24, 2023: British Journal of Sports Medicine
https://read.qxmd.com/read/37860156/use-of-pharmaceuticals-amongst-athletes-tested-by-anti-doping-norway-in-a-five-year-period
#18
JOURNAL ARTICLE
Astrid Gjelstad, Tine Marie Herlofsen, Anne-Linn Bjerke, Fredrik Lauritzen, Ingunn Björnsdottir
INTRODUCTION: The aim of the study was to map the use of pharmaceuticals by Norwegian athletes registered on doping control forms (DCFs) in a five-year period to examine general and some class specific use of pharmaceuticals across sports and athlete levels. METHOD: Anonymous data from DCFs collected in 2015-2019 were manually entered into a database using the Anatomical Therapeutic Chemical (ATC) system for classification of the pharmaceuticals. Variables entered were year of control, gender, age group, athlete level, sport, test type, nationality, and pharmaceuticals (and dietary supplements) used...
2023: Frontiers in sports and active living
https://read.qxmd.com/read/37804364/comprehensive-analysis-of-performance-physiological-and-perceptual-responses-during-an-entire-sprint-cross-country-skiing%C3%A2-competition
#19
JOURNAL ARTICLE
Rune Kjøsen Talsnes, Tore Berdal, Jan-Magnus Brattebø, Trine Seeberg, Thomas Losnegard, Jan Kocbach, Øyvind Sandbakk
PURPOSE: To investigate performance, physiological, and perceptual responses of an entire sprint cross-country skiing competition in the skating style. METHODS: Eighteen national-level male junior skiers participated in a simulated competition comprising an individual time trial (TT), followed by three heats (quarterfinals [QF], semifinals [SF], and final [F]). Participants' heart rate (HR) was continuously monitored while perceived readiness (RED, 1-10), rating of perceived exertion (RPE, 6-20), and blood lactate [La-] were assessed at standardized time points...
October 7, 2023: European Journal of Applied Physiology
https://read.qxmd.com/read/37758254/highly-trained-biathletes-with-a-fast-start-pacing-pattern-improve-time-trial-skiing-performance-by-pacing-more-evenly
#20
JOURNAL ARTICLE
Thomas Losnegard, Magne Lund-Hansen, Erland Vedeler Stubbe, Even Dahlen Granrud, Harri Luchsinger, Øyvind Sandbakk, Jan Kocbach
PURPOSE: In sprint biathlon, a J-shaped pacing pattern is commonly used. We investigated whether biathletes with a fast-start pacing pattern increase time-trial skiing and shooting performance by pacing more evenly. METHODS: Thirty-eight highly trained biathletes (∼21 y, 27 men) performed an individual 7.5 (3 × 2.5 km for women) or 10-km (3 × 3.3 km for men) time trial on roller skis with a self-selected pacing strategy (day 1). Prone (after lap 1) and standing shooting (after lap 2) stages were performed using paper targets...
September 27, 2023: International Journal of Sports Physiology and Performance
keyword
keyword
74533
1
2
Fetch more papers »
Fetching more papers... Fetching...
Remove bar
Read by QxMD icon Read
×

Save your favorite articles in one place with a free QxMD account.

×

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"

We want to hear from doctors like you!

Take a second to answer a survey question.