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https://www.readbyqxmd.com/read/28713458/trunk-strength-characteristics-of-elite-alpine-skiers-a-comparison-with-physically-active-controls
#1
Carolin Hildebrandt, Lisa Müller, Christian Heisse, Christian Raschner
Core muscle imbalances and weak trunk strength are relevant for injury prevention and performance. Information regarding core strength requirements and ideal flexion/extension ratios in alpine skiing is limited. We aimed to compare trunk strength capacities in elite alpine skiers with those of a matched control group. The concentric maximal trunk flexion and extension of 109 elite skiers and 47 active controls were measured at 150°/s in a ballistic mode using the CON-TREX® TP 1000 test system. The relative flexion peak torque was higher in male ski racers (p = 0...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28713454/balance-basic-anthropometrics-and-performance-in-young-alpine-skiers-longitudinal-analysis-of-the-associations-during-two-competitive-seasons
#2
Blaz Lesnik, Damir Sekulic, Matej Supej, Michael R Esco, Milan Zvan
Balance is hypothesized to be important in alpine skiing, while it is known that balance depends on anthropometric indices. The aim of this investigation was to explore the association between balance, anthropometrics and skiing-results over two competitive seasons among youth alpine-skiers. Eighty-one skiers (40 females) participated in this study. The participants were tested twice over two competitive seasons: when they were 12-13 years old (U14) and when they were 14-15 years old (U16). The variables consisted of anthropometrics (body height and body mass) and three balance indexes (medio-lateral-, anterio-posterior- and overall-stability-index)...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28689164/head-impact-velocities-in-fis-world-cup-snowboarders-and-freestyle-skiers-do-real-life-impacts-exceed-helmet-testing-standards
#3
Sophie E Steenstrup, Kam-Ming Mok, Andrew S McIntosh, Roald Bahr, Tron Krosshaug
INTRODUCTION: Prior to the 2013-2014 season, the International Ski Federation (FIS) increased the helmet testing speed from a minimum requirement of 5.4 to 6.8 m/s for alpine downhill, super-G and giant slalom and for freestyle ski cross, but not for the other freestyle disciplines or snowboarding. Whether this increased testing speed reflects impact velocities in real head injury situations on snow is unclear. We therefore investigated the injury mechanisms and gross head impact biomechanics in four real head injury situations among World Cup (WC) snowboard and freestyle athletes and compared these with helmet homologation laboratory test requirements...
July 8, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28552919/methods-for-acquiring-data-on-terrain-geomorphology-course-geometry-and-kinematics-of-competitors-runs-in-alpine-skiing-a-historical-review
#4
Włodzimierz S Erdmann, Vassilis Giovanis, Piotr Aschenbrenner, Vaios Kiriakis, Andrzej Suchanowski
PURPOSE: This paper aims at the description and comparison of methods of topographic analysis of racing courses at all disciplines of alpine skiing sports for the purposes of obtaining: terrain geomorphology (snowless and with snow), course geometry, and competitors' runs. METHODS: The review presents specific methods and instruments according to the order of their historical appearance as follows: (1) azimuth method with the use of a compass, tape and goniometer instruments; (2) optical method with geodetic theodolite, laser and photocells; (3) triangulation method with the aid of a tape and goniometer; (4) image method with the use of video cameras; (5) differential global positioning system and carrier phase global positioning system methods...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28546774/injuries-and-illnesses-in-a-cohort-of-elite-youth-alpine-ski-racers-and-the-influence-of-biological-maturity-and-relative-age-a-two-season-prospective-study
#5
Lisa Müller, Carolin Hildebrandt, Erich Müller, Renate Oberhoffer, Christian Raschner
BACKGROUND: Studies on injuries and illnesses involving youth ski racers younger than 15 years are lacking in the literature. The aim of this study was prospectively to assess the incidence, prevalence, and severity of traumatic and overuse injuries, as well as illnesses of elite youth ski racers with regard to sex, biological maturity status, and relative age. SUBJECTS AND METHODS: A prospective, longitudinal cohort design was used to monitor the anthropometrics, training characteristics, traumatic and overuse injuries, and illnesses of 82 elite youth ski racers (51 males, 31 females, age 9-14 years) over 2 consecutive years...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/28513243/performance-of-alpine-touring-boots-when-used-in-alpine-ski-bindings
#6
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/28472092/influence-of-slope-steepness-foot-position-and-turn-phase-on-plantar-pressure-distribution-during-giant-slalom-alpine-ski-racing
#7
Thomas Falda-Buscaiot, Frédérique Hintzy, Patrice Rougier, Patrick Lacouture, Nicolas Coulmy
The purpose of this study was to investigate the evolution of ground reaction force during alpine skiing turns. Specifically, this study investigated how turn phases and slope steepness affected the whole foot normal GRF pattern while performing giant slalom turns in a race-like setting. Moreover, the outside foot was divided into different plantar regions to see whether those parameters affected the plantar pressure distribution. Eleven skiers performed one giant slalom course at race intensity. Runs were recorded synchronously using a video camera in the frontal plane and pressure insoles under both feet's plantar surface...
2017: PloS One
https://www.readbyqxmd.com/read/28435336/anterior-cruciate-ligament-injury-reinjury-in-alpine-ski-racing-a-narrative-review
#8
REVIEW
Matthew J Jordan, Per Aagaard, Walter Herzog
The purpose of the present review was to: 1) provide an overview of the current understanding on the epidemiology, etiology, risk factors, and prevention methods for anterior cruciate ligament (ACL) injury in alpine ski racing; and 2) provide an overview of what is known pertaining to ACL reinjury and return to sport after ACL injury in alpine ski racing. Given that most of the scientific studies on ACL injuries in alpine ski racing have been descriptive, and that very few studies contributed higher level scientific evidence, a nonsystematic narrative review was employed...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/28424132/outcomes-of-recreational-activity-associated-trauma-in-elderly-persons-on-blood-thinning-medications
#9
Zachary M DeBoard, Jonathan Grotts, Lisa Ferrigno
With increasing life expectancy, the elderly are participating in recreational activities traditionally pursued by younger persons. Elderly patients have many reasons for worse outcomes after trauma, one of which may be the rising use of anticoagulant and/or antiplatelet medications. This study aimed to determine whether preinjury use of these agents yielded worse outcomes in geriatric patients injured during high-impact recreational activities. The National Trauma Data Bank was reviewed from 2007 to 2010 for patients ≥65 years admitted to Level I or II trauma centers with ICD-9 E-codes for specific mechanisms of injury...
April 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28398944/alpine-skiing-as-winter-time-high-intensity-training
#10
Thomas Stöggl, Christoph Schwarzl, Edith E Müller, Masaru Nagasaki, Julia Stöggl, Martin Schönfelder, Josef Niebauer
INTRODUCTION: To counteract the winter activity deficit, we set out to analyze cardiorespiratory and metabolic responses of two high intensity training (HIT) protocols during alpine skiing (AS), cross-country skiing (XCS) and indoor cycling (IC) and the effects of sex, age and fitness level in this comparison. METHODS: Nineteen healthy subjects (two age and fitness groups, both sexes) performed AS, XCS, and IC with measurements of oxygen uptake (VO2), energy expenditure (EE), heart rate (HR), lactate, blood glucose and rate of perceived exertion, determined during 4-min of continuous high intensity (HITc: 90% HRmax for XCS and IC or short turn skiing during AS) or 10-min intermittent HIT [HITint: 5x1' high intensity (>90% HRmax or short turn skiing), 1' active recovery]...
April 11, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28223309/how-can-we-prove-that-a-preventive-measure-in-elite-sport-is-effective-when-the-prevalence-of-the-injury-eg-acl-tear-in-alpine-ski-racing-is-low-a-case-for-surrogate-outcomes
#11
EDITORIAL
Josef Kröll, Jörg Spörri, Sophie Elspeth Steenstrup, Hermann Schwameder, Erich Müller, Roald Bahr
No abstract text is available yet for this article.
February 21, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28141537/joint-inertial-sensor-orientation-drift-reduction-for-highly-dynamic-movements
#12
Benedikt Fasel, Jorg Sporri, Julien Chardonnens, Josef Kroll, Erich Muller, Kamiar Aminian
Inertial sensor drift is usually corrected on a single-sensor unit level. When multiple sensor units are used, mutual information from different units can be exploited for drift correction. This study introduces a method for a drift-reduced estimation of three dimensional (3D) segment orientations and joint angles for motion capture of highly dynamic movements as present in many sports. 3D acceleration measured on two adjacent segments is mapped to the connecting joint. Drift is estimated and reduced based on the mapped accelerations' vector orientation differences in the global frame...
January 26, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28030491/severe-injuries-associated-with-skiing-and-snowboarding-a-national-trauma-data-bank-study
#13
Amory de Roulet, Kenji Inaba, Aaron Strumwasser, Konstantinos Chouliaras, Lydia Lam, Elizabeth Benjamin, Daniel Grabo, Demetrios Demetriades
BACKGROUND: Injuries after skiing and snowboarding accidents lead to an estimated 7,000 hospital admissions annually and present a significant burden to the health care system. The epidemiology, injury patterns, hospital resource utilization, and outcomes associated with these severe injuries need further characterization. METHODS: The National Trauma Data Bank was queried for the period 2007 to 2014 for admissions with Injury Severity Score > 15 and International Classification of Diseases Codes-9th Revision codes 885...
April 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27884864/sports-injuries-and-illnesses-in-the-lillehammer-2016-youth-olympic-winter-games
#14
Kathrin Steffen, Christine Holm Moseid, Lars Engebretsen, Pia K Søberg, Olav Amundsen, Kristian Holm, Thomas Moger, Torbjørn Soligard
BACKGROUND: Injury and illness surveillance during high-level youth sports events is an important first step in health prevention and caretaking of the young elite athletes. AIM: To analyse injuries and illnesses that occurred during the 10 days 2nd Youth Olympic Winter Games (YOG), held in Lillehammer 2016. METHODS: We recorded the daily occurrence (or non-occurrence) of injuries and illnesses through the reporting of (1) all National Olympic Committee (NOC) medical teams and (2) the polyclinic and medical venues by the Lillehammer Organising Committee (LYOCOG) medical staff...
January 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27808056/-mountain-medicine-an-introduction-i
#15
Kasper Fjellhaugen Hjuler, Bjørn Bay
Tourism to high-altitude areas is increasingly popular even from low-lying regions such as Denmark. Mountain sports include skiing, mountaineering, and ski touring. The young, elderly and at-risk individuals with pre-existing illnesses engage in recreational mountain activities. Thus, risk assessment and counselling regarding altitude exposure is increasingly relevant to all healthcare providers. In this first article of two in a review series, we summarize the state of the art of altitude physiology, alpine dangers and avalanches, and medical aspects of the increased UV-exposure at altitude...
October 31, 2016: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/27560498/collecting-kinematic-data-on-a-ski-track-with-optoelectronic-stereophotogrammetry-a-methodological-study-assessing-the-feasibility-of-bringing-the-biomechanics-lab-to-the-field
#16
Jörg Spörri, Christian Schiefermüller, Erich Müller
In the laboratory, optoelectronic stereophotogrammetry is one of the most commonly used motion capture systems; particularly, when position- or orientation-related analyses of human movements are intended. However, for many applied research questions, field experiments are indispensable, and it is not a priori clear whether optoelectronic stereophotogrammetric systems can be expected to perform similarly to in-lab experiments. This study aimed to assess the instrumental errors of kinematic data collected on a ski track using optoelectronic stereophotogrammetry, and to investigate the magnitudes of additional skiing-specific errors and soft tissue/suit artifacts...
2016: PloS One
https://www.readbyqxmd.com/read/27540485/investigating-physical-fitness-and-race-performance-as-determinants-for-the-acl-injury-risk-in-alpine-ski-racing
#17
Kai-Uwe Schmitt, Nicole Hörterer, Michael Vogt, Walter O Frey, Silvio Lorenzetti
BACKGROUND: ACL ruptures in Alpine ski racers are frequently observed. This study analysed the association between physical fitness, race performance and the knee injury history. METHODS: A retrospective study was conducted to investigate the influence of physical fitness and performance on the knee injury outcome. As part of this study an injury data base (covering 2004-2013) was established that recorded information about the athletes, their fitness status as determined by a standardised fitness test (Swiss Ski Power Test, SSPT) as well as medical information related to injuries...
2016: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27532454/asymmetry-and-thigh-muscle-coactivity-in-fatigued-anterior-cruciate-ligament-reconstructed-elite-skiers
#18
Matthew J Jordan, Per Aagaard, Walter Herzog
PURPOSE: The acute effects of fatigue on functional interlimb asymmetry and quadriceps/hamstring muscle activity levels, including preparatory coactivation during squat jump takeoff and landing, were evaluated in elite alpine ski racers with/without anterior cruciate ligament reconstruction (ACLR). METHODS: Twenty-two elite ski racers (ACLR, n = 11; control, n = 11) performed an 80-s repeated squat jump test (jump test) on a dual force plate system with simultaneous EMG recordings in vastus lateralis, vastus medialis, semitendinosus, and biceps femoris...
January 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27531522/helmet-use-and-risk-of-head-injuries-in-alpine-skiers-and-snowboarders-changes-after-an-interval-of-one-decade
#19
Steinar Sulheim, Arne Ekeland, Ingar Holme, Roald Bahr
BACKGROUND: In a previous study, we concluded that a safety helmet can reduce the risk for head injury by 60%. Other studies reported similar effects, resulting in a general recommendation to wear a helmet while skiing or snowboarding. AIM: To determine the effect of the expected increased helmet wear on the risk of head injury one decade after the recommendation. METHODS: Ski patrols reported injury cases in major Norwegian alpine ski resorts...
January 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27525174/utilization-of-impact-testing-to-measure-injury-risk-in-alpine-ski-and-snowboard-athletes
#20
John Faltus, Brittney Huntimer, Thomas Kernozek, John Cole
BACKGROUND: While studies that have examined the prevalence of musculoskeletal injuries in alpine skiing and snowboarding exist, there has been no discussion of how neurocognitive deficits may influence such injuries. Recent authors have identified a possible link between Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) testing results and the prevalence of musculoskeletal injury in athletic populations. However, no study has specifically examined this in the alpine skiing and snowboard athletes who sustain injury and those that do not...
August 2016: International Journal of Sports Physical Therapy
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