Blar i Brage NIH på forfatter "Olstad, Bjørn Harald"
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Race analysis in competitive swimming: A narrative review
Gonjo, Tomohiro; Olstad, Bjørn Harald (Peer reviewed; Journal article, 2020)Researchers have quantified swimming races for several decades to provide objective information on race strategy and characteristics. The purpose of the present review was to summarize knowledge established in the literature ... -
The relationship between selected load-velocity profile parameters and 50 m front crawl swimming performance
Gonjo, Tomohiro; Njøs, Nikolai; Eriksrud, Ola; Olstad, Bjørn Harald (Peer reviewed; Journal article, 2021)The purpose of the present study was to establish relationships between sprint front crawl performance and a swimming load-velocity profile. Fourteen male national-level swimmers performed 50 m front crawl and semi-tethered ... -
Reliability of a semi-tethered front crawl sprint performance test in adolescent swimmers
Szczepan, Stefan; Wróblewska, Zofia; Klich, Sebastian; Michalik, Kamil; Gonjo, Tomohiro; Olstad, Bjørn Harald; Rejman, Marek (Peer reviewed; Journal article, 2023)This study aimed to evaluate the test-retest reliability of a sprint performance test with semi-tethered front crawl swimming to indirectly assess the current potential to perform at maximal anaerobic effort in adolescent ... -
Reliability of load-velocity profiling in front crawl swimming
Olstad, Bjørn Harald; Gonjo, Tomohiro; Njøs, Nikolai; Abächerli, Kathrin; Eriksrud, Ola (Peer reviewed; Journal article, 2020)The purposes of this study were to establish test-retest reliability of calculating load-velocity profiles in front crawl swimming using five and three different external loads, and if outcome results were comparable between ... -
Reliability of the active drag assessment using an isotonic resisted sprint protocol in human swimming
Gonjo, Tomohiro; Olstad, Bjørn Harald (Peer reviewed; Journal article, 2022)The purpose of the presents study was to investigate the reliability of the active drag (Da) assessment using the velocity perturbation method (VPM) with different external resisted forces. Eight male and eight female ... -
Start and turn performances of competitive swimmers in sprint butterfly swimming
Gonjo, Tomohiro; Olstad, Bjørn Harald (Peer reviewed; Journal article, 2020)The purposes of this study were to establish relationships between selected underwater kinematics and the starting and turning performances and to quantify kinematic differences between these segments in sprint butterfly ... -
SwimBIT: A Novel Approach to Stroke Analysis During Swim Training Based on Attitude and Heading Reference System (AHRS)
Felix, Eduardo Ramos; da Silva, Hugo Plácido; Olstad, Bjørn Harald; Cabri, Jan; Correia, Paulo Lobato (Peer reviewed; Journal article, 2019)In a world where technology is assuming a pervasive role, sports sciences are also increasingly exploiting the possibilities opened by advanced sensors and intelligent algorithms. This paper focuses on the development of ... -
Validation of the Polar OH1 and M600 optical heart rate sensors during front crawl swim training
Olstad, Bjørn Harald; Zinner, Christoph (Peer reviewed; Journal article, 2020)Purpose: The Polar OH1 is an optical heart rate (HR) sensor which can be used on different parts of the body. The purpose of the study was to evaluate the validity of the OH1 as well as a wrist worn heart rate device (Polar ...