Browsing NTNU Open by Author "Sandbakk, Øyvind"
Now showing items 1-20 of 147
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A Comparison of Frontal Theta Activity During Shooting among Biathletes and Cross-Country Skiers before and after Vigorous Exercise
Luchsinger, Harri; Sandbakk, Øyvind; Schubert, Michael; Ettema, Gerardus Johannes C; Baumeister, Jochen (Journal article; Peer reviewed, 2016)Background Previous studies using electroencephalography (EEG) to monitor brain activity have linked higher frontal theta activity to more focused attention and superior performance in goal-directed precision tasks. In ... -
A multi-sensor system for automatic analysis of classical cross-country skiing techniques
Seeberg, Trine Margrethe; Tjønnås, Johannes; Rindal, Ole Marius Hoel; Haugnes, Pål; Dalgard, Steffen Harald; Sandbakk, Øyvind (Journal article; Peer reviewed, 2017)Commercial systems utilizing data from inertial measurement units (IMUs) to analyse movement patterns have not yet been adapted to monitor daily training in cross-country (XC) skiing. The main purposes of this study are ... -
The aerobic and anaerobic contribution during repeated 30-s sprints in elite cyclists.
Almquist, Nicki Winfield; Sandbakk, Øyvind; Rønnestad, Bent R.; Noordhof, Dionne (Journal article; Peer reviewed, 2021)Although the ability to sprint repeatedly is crucial in road cycling races, the changes in aerobic and anaerobic power when sprinting during prolonged cycling has not been investigated in competitive elite cyclists. Here, ... -
Analysis of a Biathlon Sprint Competition and Associated Laboratory Determinants of Performance
Luchsinger, Harri; Talsnes, Rune; Kocbach, Jan; Sandbakk, Øyvind (Journal article; Peer reviewed, 2019)Biathlon is an Olympic winter-sport where cross-country (XC) skiing in the skating technique is combined with rifle shooting. In the biathlon sprint competition for men, three laps of 3.3-km are interspersed with a 5-shot ... -
Analysis of a skating time-trial competition and associated performance-determinants in cross-country skiers
Shang, Lei; Sandbakk, Øyvind; Shi, Ruiying; Chen, Xiaoping; Talsnes, Rune Kjøsen (Peer reviewed; Journal article, 2022)Purpose: To examine the contributions of time in different terrains and sub-technique distribution to overall time-trial performance, as well as the relationships of laboratory and field-based performance determinants in ... -
Analysis of a sprint biathlon competition and associated laboratory determinants of performance
Talsnes, Rune Kjøsen (Master thesis, 2017)Background: Biathlon is a traditional Olympic winter sport combining cross-country skiing using the skating technique with rifle shooting. Thus, biathlon is a complex sport, that in addition to a high endurance capacity ... -
Analysis of classical time-trial performance and technique-specific physiological determinants in elite female cross-country skiers
Sandbakk, Øyvind; Losnegard, Thomas; Skattebo, Øyvind; Hegge, Ann Magdalen; Tønnessen, Espen; Kocbach, Jan (Peer reviewed; Journal article, 2016)The present study investigated the contribution of performance on uphill, flat, and downhill sections to overall performance in an international 10-km classical time-trial in elite female cross-country skiers, as well as ... -
Analysis of Endurance Coaches’ and Athletes’ perceptions and experiences of causes for long-term underperformance and recovery strategies used in the return to previous performance levels
Eid, Hanna (Master thesis, 2023)Bakgrunn: Langvarig underprestasjon (LTU) er anerkjent som et kritisk problem som utholdenhets trenere og utøvere må møte sammen. Ved å utforske deres oppfatninger av denne situasjonen, kan det gi oss en mer utfyllende ... -
Analysis of race-preparation strategies, performance-development and physiological responses during an entire sprint competition in cross-country skiing
Berdal, Tore (Master thesis, 2022)Formål: Beskrive rennforberedelser, utvikling av prestasjon og fysiologiske responser under en hel sprintkonkurranse i langrenn. Metode: 20 mannlige junior langrennsutøvere deltok i en simulert langrennssprint, bestående ... -
Are gender differences in upper-body power generated by elite cross-country skiers augmented by increasing the intensity of exercise?
Hegge, Ann Magdalen; Myhre, Kenneth; Welde, Boye; Holmberg, Hans-Christer; Sandbakk, Øyvind (Peer reviewed; Journal article, 2015)In the current study, we evaluated the impact of exercise intensity on gender differences in upper-body poling among cross-country skiers, as well as the associated differences in aerobic capacity, maximal strength, body ... -
Assessment of Basic Motions and Technique Identification in Classical Cross-Country Skiing
Tjønnås, Johannes; Trine, Seeberg; Rindal, Ole Marius Hoel; Haugnes, Pål; Sandbakk, Øyvind (Journal article; Peer reviewed, 2019)Cross-country skiing is a popular Olympic winter sport, which is also used extensively as a recreational activity. While cross-country skiing primarily is regarded as a demanding endurance activity it is also technically ... -
Association between Laboratory Capacities and World-cup Performance in Nordic Combined
Rasdal, Vegard; Fudel, Ronny; Kocbach, Jan; Moen, Frode; Ettema, Gertjan; Sandbakk, Øyvind (Journal article; Peer reviewed, 2017)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 ... -
Associations between body-height-normalized pole and ski lengths and performance among male and female elite cross-country skiers
Torvik, Per Øyvind; van den Tillaar, Roland Johannes Wilhelmus; Sandbakk, Øyvind (Peer reviewed; Journal article, 2021)Cross-country (XC) skiers employ whole-body exercise to generate speed through poles and skis. The choice of optimal pole and ski lengths are therefore of high importance. The aim of this study was to document pole and ski ... -
Automated classification and quantification of spatio-temporal parameters in cross-country skiing skating technique by analysis of inertial sensor data and sensor insole data
Garsjø, Lene-Kristine (Master thesis, 2017)The aim of this thesis was (1) to develop a method for dividing cross-country skiing cycles into phases, and (2) extract and select features characterizing the change in center of pressure (CoP) during these phases. Both ... -
Automated detection and classification of movement cycles in cross-country skiing through analysis of inertial sensor data movement patterns
Meland, Henrik J. (Master thesis, 2017)Published technique analysis tools for movement patterns in cross-country skiing have accuracies ranging from 88% up to 98.5%, but reviews of these studies reveals that none have thoroughly addressed classifier robustness ... -
Automatic Classification of Sub-Techniques in Classical Cross-Country Skiing Using a Machine Learning Algorithm on Micro-Sensor Data
Rindal, Ole Marius Hoel; Seeberg, Trine Margrethe; Tjønnås, Johannes; Haugnes, Pål; Sandbakk, Øyvind (Journal article; Peer reviewed, 2018)The automatic classification of sub-techniques in classical cross-country skiing provides unique possibilities for analyzing the biomechanical aspects of outdoor skiing. This is currently possible due to the miniaturization ... -
Block vs. Traditional Periodization of HIT: Two Different Paths to Success for the World’s Best Cross-Country Skier
Solli, Guro Strøm; Espen, Tønnessen; Sandbakk, Øyvind (Journal article; Peer reviewed, 2019)In short-term studies, block periodization of high-intensity training (HIT) has been shown to be an effective strategy that enhances performance and related physiological factors. However, long-term studies and detailed ... -
Blood Pressure Response and Pulse Arrival Time During Exercise Testing in Well-Trained Individuals
Heimark, Sondre; Eitzen, Ingrid; Vianello, Isabella; Bøtker-Rasmussen, Kasper; Mamen, Asgeir; Rindal, Ole Marius Hoel; Waldum-Grevbo, Bård; Sandbakk, Øyvind; Seeberg, Trine Margrethe (Peer reviewed; Journal article, 2022)Introduction: There is a lack of data describing the blood pressure response (BPR) in well-trained individuals. In addition, continuous bio-signal measurements are increasingly investigated to overcome the limitations of ... -
Changes in power output, physiological responses and technique during upper-body repeated sprint exercise
Skålvik, Tommy Fredriksen (Master thesis, 2013)Purpose: The purpose of this study was to examine upper-body repeated sprint performance, physiological responses, and the relationships to technique and muscle co-ordination. Methods: Twelve male elite cross-country ... -
Comparison of contemporary intensity distribution approach and increased amount of high- or low intensity when progressing training load in the preparation period of cross-country skiers.
Tomson, Henek (Master thesis, 2021)Background. Successful endurance athletes train a relatively large volume at low intensity endurance training, which is interspersed by relatively low volumes of high intensity training. There is, however, strong indications ...