Christian Froyd

• PhD
• Professor (Associate) at Western Norway University of Applied Sciences

Objective: To investigate whether a cycling test based on decremental loads (DEC) could elicit higher maximal oxygen uptake (V˙O2max) values compared with an incremental test (INC). Design: Nineteen well-trained individuals performed an INC and a DEC test on a single day, in randomized order. Methods: During INC, the load was increased by 20 W...

The kinetics of recovery from neuromuscular fatigue resulting from exercise time trials (TTs) of different durations are not well-known. The aim of this study was to determine if TTs of three different durations would result in different short-term recovery in maximal voluntary contraction (MVC) and evoked peak forces. Twelve trained subjects perfo...

We asked whether the level of peripheral fatigue would differ when three consecutive exercise trials were completed to task failure, and whether there would be delayed recovery in maximal voluntary contraction (MVC) force, neuromuscular activation and peripheral fatigue following task failure. Ten trained sport students performed three consecutive...

We asked whether the level of peripheral fatigue would differ when three consecutive exercise trials were completed to task failure, and whether there would be delayed recovery in maximal voluntary contraction (MVC) force, neuromuscular activation and peripheral fatigue following task failure. Ten trained sport students performed three consecutive...

As of 2017, the international football federation introduced the change of direction ability test (CODA) and the 5×30 m sprint test for assistant referees (ARs) and continued the 6×40 m sprint test for field referees (FRs) as mandatory tests. The aim of this study was to evaluate the association between performance in these tests and running perfor...

Objectives: (1) to examine accelerations and high intensity running (HIR) in football field referees (FR) and assistant referees (AR) during football matches and (2) to evaluate fluctuations in accelerations and HIR between first and second half and in 5-min periods. Methods: All movements of the referees were measured using a radio-based tracking...

It has been proposed that group III and IV muscle afferents provide inhibitory feedback from locomotor muscles to the central nervous system, setting an absolute threshold for the development of peripheral fatigue during exercise. The aim of this study was to test the validity of this theory. Thus, we asked whether the level of developed peripheral...

Purpose: The aim of this study was to determine if exercise time trials (TT) of different durations would cause different levels of peripheral and central fatigue during exercise. Methods: Twelve trained subjects (11 men, 1 woman) performed TTs lasting 3, 10 and 40 min with repetitive self-paced concentric right knee extension at 60 deg[BULLET O...

Utarbeiding av en treningsplan, som er den første delen av treningsprosessen, inneholder ti steg, og de følger naturlig etter hverandre (se kapittel 12, figur 12.02). Mye av denne planleggingen er bundet til en viss rekkefølge der hvert steg i stor grad bør bygge på det som er gjort tidligere. Noen av disse stegene inneholder forhold som bestemmes...

Dokumentasjon av trening i en treningsdagbok, testing, analyse og evaluering av trening er viktig for god kvalitet i treningsprosessen. Informasjon om utført trening og endring av prestasjonsevne gjør at man kan utarbeide nye treningsplaner og gjennomføre trening på en stadig bedre måte.

Inntak av mat og drikke er helt nødvendig for at kroppen skal kunne fungere, og for å få størst mulig utbytte av trening og konkurranse. I dette kapitlet er fokuset primært lagt på kost og kostvaner til idrettsutøvere med sikte på å gjøre trening og prestasjon i konkurranser best mulig. Det er vesentlig å diskutere hva og hvor mye man skal spise, o...

Resultatene man oppnår i idrett, gjenspeiler i de fleste tilfellene kvaliteten i forberedelsene. Skal man gjøre det godt i idrett på et mer avansert nivå, må man være tilstrekkelig forberedt ut fra de kravene som til enhver tid gjelder. Både trenere og ambisiøse utøvere må gjøre de rette tingene til rett tid og i tilstrekkelig grad over flere år. D...

Utholdenhet er en viktig egenskap for prestasjon i mange idretter, men også i sammenheng med yrke og hverdagsliv. Vanligvis bruker vi utholdenhetsbegrepet for arbeidsperioder fra 1–2 minutter til flere timer, men utholdenhet kan også benyttes i sammenheng med kortere arbeidsperioder. I tillegg til å klargjøre sentrale begreper, modeller for å forkl...

The aim of this study was to investigate the effect of potentiation on stimulation-induced muscle function during and after an intense bout of self-paced dynamic exercise. Ten active subjects performed a time trial involving repetitive concentric extension-flexion of the right knee using a Biodex dynamometer. Electrical stimulation before and after...

We investigated the accuracy of the Moxus Modular Metabolic System (MOXUS) against the Douglas Bag Method (DBM) during high-intensity exercise, and whether the two methods agreed when detecting small changes in [Formula: see text] between two consecutive workloads ([Formula: see text]). Twelve trained male runners performed two maximal incremental...

The aim of this study was to measure the extent to which potentiation changes in response to an isometric maximal voluntary contraction. Eleven physically active subjects participated in two separate studies. Single stimulus of electrical stimulation of the femoral nerve was used to measure torque at rest in unpotentiated quadriceps muscles (study...

Key points In this study we describe the time course of fatigue development during and after an intense bout of self‐paced, high‐intensity dynamic exercise using various electrical stimulation parameters to assess neuromuscular function (NMF) changes. Most of the decrease in muscle function occurs within the first 40% of the exercise bout, and subs...

This study used a novel protocol to test the hypothesis that a plateau in oxygen consumption (VO(2 max)) during incremental exercise testing to exhaustion represents the maximal capacity of the cardiovascular system to transport oxygen. Twenty-six subjects were randomly divided into two groups matched by their initial VO(2 max). On separate days, t...

Treadmill tests for orienteering runners to monitor fitness and prescribe training intensities are common, but the relevance to real competition settings with running in forested terrain may be minimal. Portable oxygen and lactate analysers make it possible to characterize competition settings in forested terrain and to compare those results to lab...

Treadmill tests for orienteering runners to monitor fitness and prescribe training intensities are common, but the relevance to real competition settings with running in forested terrain may be minimal. Portable oxygen and lactate analysers make it possible to characterize competition settings in forested terrain and to compare those results to lab...

Boka ble lansert 28. mars 2005. Den beskriver hvilke fysiske faktorer som er avgjørende for prestasjon i utholdenhetsidretter, hvordan treningen kan deles inn i intensitetssoner, og hvordan prestasjonene kan utvikles i en langsiktig og systematisk prosess gjennom god treningsplanlegging. Treningsfilosofien som boka bygger på er utviklet av Rolf Sæt...