Browsing NTNU Open by Author "Hallén, Jostein"

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    • Determinants and reference values for blood volume and total hemoglobin mass in women and men 

      Oberholzer, Laura; Montero, David; Robach, Paul; Siebenmann, Christoph; Ryrsøe, Camilla Koch; Bonne, Thomas C.; Breenfeldt Andersen, Andreas; Bejder, Jacob; Karlsen, Trine; Edvardsen, Elisabeth; Rønnestad, Bent; Hamarsland, Håvard; Cepeda-Lopez, Ana C.; Rittweger, Jörn; Treff, Gunnar; Ahlgrim, Christoph; Almquist, Nicki Winfield; Hallén, Jostein; Lundby, Carsten (Peer reviewed; Journal article, 2023)
      Blood volume (BV) is an important clinical parameter and is usually reported per kg of body mass (BM). When fat mass is elevated, this underestimates BV/BM. One aim was to study if differences in BV/BM related to sex, age, ...

    • Evidence against a Beneficial Effect of Irisin in Humans 

      Raschke, Silja; Elsen, Manuela; Gassenhuber, Hans; Sommerfeld, Mark; Schwahn, Uwe; Brockmann, Barbara; Jung, Raphael; Wisløff, Ulrik; Tjønna, Arnt Erik; Raastad, Truls; Hallén, Jostein; Norheim, Frode; Drevon, Christian A; Romacho, Tania; Eckardt, Kristin; Eckel, Juergen (Journal article; Peer reviewed, 2013)
      Brown adipose tissue has gained interest as a potential target to treat obesity and metabolic diseases. Irisin is a newly identified hormone secreted from skeletal muscle enhancing browning of white fat cells, which ...

    • Technique analysis in elite athletes using principal component analysis 

      Gløersen, Øyvind Nøstdahl; Myklebust, Håvard; Hallén, Jostein; Federolf, Peter Andreas (Journal article; Peer reviewed, 2018)
      The aim of this study was to advance current movement analysis methodology to enable a technique analysis in sports facilitating (1) concurrent comparison of the techniques between several athletes; (2) identification of ...

    • The Influence of Pole Length on Performance, O2-Cost and Kinematics in Double Poling 

      Losnegard, Thomas; Myklebust, Håvard; Skattebo, Øyvind; Stadheim, Hans Kristian; Sandbakk, Øyvind; Hallén, Jostein (Journal article; Peer reviewed, 2017)
      Purpose: In the double poling cross-country skiing technique, the propulsive forces are transferred solely through the poles. The aim of the present study was to investigate how pole length influences double poling ...