Jan Kocbach
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View article: Exploring key factors associated with training quality among elite para-athletes. A qualitative study
Exploring key factors associated with training quality among elite para-athletes. A qualitative study Open
Introduction Despite extensive research on training load characteristics, knowledge about training quality remains sparse. Training quality encompasses two dimensions: quality in the training process and quality in specific training sessio…
View article: Sex differences in classical and skating cross-country skiing time-trial competitions
Sex differences in classical and skating cross-country skiing time-trial competitions Open
Purpose To compare differences in speed, sub-technique selection, and kinematics between male and female cross-country skiers during 10-km time-trial competitions. Methods Elite- to world-class skiers performed FIS-regulated 3 × 3.3-km cla…
View article: Day‐To‐Day Endurance Training Periodization of World‐Class Cross‐Country Skiers
Day‐To‐Day Endurance Training Periodization of World‐Class Cross‐Country Skiers Open
This study aimed to investigate the day‐to‐day endurance training periodization of male and female world‐class cross‐country skiers. Self‐reported session‐by‐session training data from 17 (7 female) world‐class cross‐country skiers were re…
View article: The effect of work rate on metabolic and mechanical intensity measures across skating style sub‐techniques in cross‐country skiing
The effect of work rate on metabolic and mechanical intensity measures across skating style sub‐techniques in cross‐country skiing Open
The purpose of this study was to examine how the work rate (WR) influences whole‐body metabolic rate (MR) and more local measures of intensity (i.e., pole power, joint power, and triceps brachii (TB) and vastus lateralis (VL) tissue satura…
View article: A method for processing inertial measurement unit data for para-Nordic sit-ski race analysis: a step-by-step guide
A method for processing inertial measurement unit data for para-Nordic sit-ski race analysis: a step-by-step guide Open
Inertial measurement units can provide biomechanical insights into tasks performed in the laboratory and in the field and have yielded valuable information for practitioners and researchers alike within several sports. However, for data fr…
View article: Effect of Class, Sex, and Final Rank on the Time Distribution Across Terrains During Para Cross‐Country Skiing Races
Effect of Class, Sex, and Final Rank on the Time Distribution Across Terrains During Para Cross‐Country Skiing Races Open
Para cross‐country (XC) skiers compete in race courses with different terrains (uphill, downhill, and undulated) across several classes in three categories (visually, standing, and sitting impaired). The objectives were to investigate (1) …
View article: Quantification of losses from borehole thermal energy storage through distributed temperature sensing and numerical modelling
Quantification of losses from borehole thermal energy storage through distributed temperature sensing and numerical modelling Open
Borehole Thermal Energy Storage (BTES) is a successful technology for storing and supplying heat and cooling for buildings and industry. The losses from the storage can be drastically reduced by changes in design and operation. According t…
View article: Comparison of BTES modelling approaches in an energy system model: inaccuracies in BTES model results have limited impact on total seasonal performance factor
Comparison of BTES modelling approaches in an energy system model: inaccuracies in BTES model results have limited impact on total seasonal performance factor Open
Borehole thermal energy storage (BTES) has reduced energy usage by supplying large portions of the heating and cooling demands in buildings and industry. System modeling is used for design and preliminary assessment of expected savings fro…
View article: A spectrum-of-spectrum filtering method to extract direct and multipath arrivals from simulations and measurements
A spectrum-of-spectrum filtering method to extract direct and multipath arrivals from simulations and measurements Open
In measurements and numerical modelling of wave propagation, undesired interference between direct and multipath arrivals can be reduced using Fourier-based signal processing methods. Existing methods, such as cepstral analysis and time-si…
View article: Highly Trained Biathletes With a Fast-Start Pacing Pattern Improve Time-Trial Skiing Performance by Pacing More Evenly
Highly Trained Biathletes With a Fast-Start Pacing Pattern Improve Time-Trial Skiing Performance by Pacing More Evenly Open
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…
View article: The influence of tactical positioning on performance in sprint cross-country skiing
The influence of tactical positioning on performance in sprint cross-country skiing Open
The purpose of this study was to examine the influence of tactical positioning on performance in the heats of sprint cross-country (XC) skiing among men and women and the consistency of overtaking events over repeated competitions on the s…
View article: The Influence of a Fast Start Versus a Conservative Start Pacing Strategy on Sprint Roller Skiing Performance in Highly Trained Female Junior Skiers
The Influence of a Fast Start Versus a Conservative Start Pacing Strategy on Sprint Roller Skiing Performance in Highly Trained Female Junior Skiers Open
Purpose Pacing profiles differ substantially in endurance sports with short competition duration (2–4 min). Herein, we investigated the effect of a fast start (FS) versus a conservative start (CS) pacing strategy on sprint time-trial perfo…
View article: Race development and performance-determining factors in a mass-start cross-country skiing competition
Race development and performance-determining factors in a mass-start cross-country skiing competition Open
Introduction Although five of six Olympic events in cross-country skiing involve mass-starts, those events are sparsely examined scientifically. Therefore, in this study, we investigated speed profiles, pacing strategies, group dynamics an…
View article: The influence of race tactics for performance in the heats of an international sprint cross-country skiing competition
The influence of race tactics for performance in the heats of an international sprint cross-country skiing competition Open
The purpose of this study was to examine the influence of race tactics for performance in the heats of an international sprint cross-country (XC) skiing competition in the classical style. Thirty elite male XC skiers (age: 24±3 years, spri…
View article: Inner-Cycle Phases Can Be Estimated from a Single Inertial Sensor by Long Short-Term Memory Neural Network in Roller-Ski Skating
Inner-Cycle Phases Can Be Estimated from a Single Inertial Sensor by Long Short-Term Memory Neural Network in Roller-Ski Skating Open
Objective: The aim of this study was to provide a new machine learning method to determine temporal events and inner-cycle parameters (e.g., cycle, pole and ski contact and swing time) in cross-country roller-ski skating on the field, usin…
View article: Inertial Sensors-Based Estimation of Temporal Events in Skating Sub-Techniques While In-Field Roller Skiing
Inertial Sensors-Based Estimation of Temporal Events in Skating Sub-Techniques While In-Field Roller Skiing Open
The aim of this study was to adapt a treadmill-developed method for determination of inner-cycle parameters in cross-country roller ski skating for a field application. The method is based on detecting initial and final ground-contact of p…
View article: Performance Effects of Video- and Sensor-Based Feedback for Implementing a Terrain-Specific Micropacing Strategy in Cross-Country Skiing
Performance Effects of Video- and Sensor-Based Feedback for Implementing a Terrain-Specific Micropacing Strategy in Cross-Country Skiing Open
Purpose : To investigate the performance effects of video- and sensor-based feedback for implementing a terrain-specific micropacing strategy in cross-country (XC) skiing. Methods : Following a simulated 10-km skating time trial (Race1) on…
View article: Inner-cycle Phases can be Estimated from a Single Inertial Sensor by Long Short-term Memory Neural Network in Roller Ski Skating
Inner-cycle Phases can be Estimated from a Single Inertial Sensor by Long Short-term Memory Neural Network in Roller Ski Skating Open
Objective: The aim of this study was to provide a new machine learning method to determine temporal events and inner-cycle parameters (e.g., cycle, poles and skis contact and swing time) in cross-country roller ski skating on the field, us…
View article: Validation of temporal parameters within the skating sub-techniques when roller skiing on a treadmill, using inertial measurement units
Validation of temporal parameters within the skating sub-techniques when roller skiing on a treadmill, using inertial measurement units Open
The aim of this study was to develop and validate a method using inertial measurements units (IMUs) to determine inner-cycle parameters (e.g., cycle, poles and skis contact, and swing time) and the main sub-techniques (i.e., G2, G3 and G4)…
View article: The AutoActive Research Environment
The AutoActive Research Environment Open
There is an ever-growing variety of biomedical sensors and wearables that aim to monitor activity, biomarkers, and vital signs.However, to fully understand the physical and physiological factors of the underlying processes, multiple sensor…
View article: Framework for effective robust design of building energy systems: Bridging the gap between predicted and actual energy use
Framework for effective robust design of building energy systems: Bridging the gap between predicted and actual energy use Open
Practitioners working on building performance simulations do seldom apply uncertainty and sensitivity analysis using state-of-the-art global methods in their daily workflow. With stricter building regulations imposed year by year, a corres…
View article: Case study on optimal design and operation of detached house energy system: Solar, battery, and ground source heat pump
Case study on optimal design and operation of detached house energy system: Solar, battery, and ground source heat pump Open
Government policy impacts the level of sustainability for which houseowners design and operate their energy system. Consequently, there is a need to consider the sustainability level resulting from different policies, assuming optimal desi…
View article: Physiological and Biomechanical Responses to Cross-Country Skiing in Varying Terrain: Low- vs. High-Intensity
Physiological and Biomechanical Responses to Cross-Country Skiing in Varying Terrain: Low- vs. High-Intensity Open
The purposes of our study were to investigate the physiological and biomechanical responses to low-intensity (LI) and high-intensity (HI) roller ski skating on varying terrain and compare these responses between training intensities. Nine …
View article: Estimation of Mechanical Power Output Employing Deep Learning on Inertial Measurement Data in Roller Ski Skating
Estimation of Mechanical Power Output Employing Deep Learning on Inertial Measurement Data in Roller Ski Skating Open
The ability to optimize power generation in sports is imperative, both for understanding and balancing training load correctly, and for optimizing competition performance. In this paper, we aim to estimate mechanical power output by employ…
View article: Laboratory- and field-based performance-predictions in cross-country skiing and roller-skiing
Laboratory- and field-based performance-predictions in cross-country skiing and roller-skiing Open
The purpose of the present study was to investigate how various laboratory- and field-based tests predict on-snow cross-country (XC) skiing and roller-skiing performance. Thirty-three national-level male XC skiers (19.0±2.5 years, maximal …
View article: Temporal and kinematic patterns distinguishing the G2 from the G4 skating sub-technique
Temporal and kinematic patterns distinguishing the G2 from the G4 skating sub-technique Open
In cross-country ski skating, both the G2 and G4 sub-techniques involve one pole push for every second ski push but are used at largely different speed-slope ranges. The aim of this study was to compare temporal and kinematic patterns betw…