title: Rebuttal by Lars Nybo and Carsten Lundby.
authors.affiliation: Department of Nutrition, Exercise and Sport Sciences, Section for Integrative Human Physiology, University of Copenhagen, Copenhagen, Denmark.
authors.forename: Lars
authors.initials: L
authors.lastname: Nybo
authors.affiliation: Zürich Center for Integrative Human Physiology, Institute of Physiology, University of Zürich, Zürich, Switzerland.
authors.forename: Carsten
authors.initials: C
authors.lastname: Lundby