title: Isometric and isotonic muscle properties as determinants of work loop power output.
abstract: The power output of rabbit latissimus dorsi muscle was calculated under isotonic conditions and during oscillatory work. Isotonic shortening studies yielded a maximum power output of 120 W . kg-1 at a P/P0 of 0.4 compared to a maximum power output of 32 W . kg-1 obtained using the work loop technique. This difference can largely be explained by comparing actual work loops with those constructed using force velocity (P/V) and isometric data. At low cycle frequencies, work loop power output is quite close to that predicted from P/V and isometric data. However, at higher frequencies other dynamic muscle properties appear to exert a more marked effect.
authors.affiliation: Department of Pure and Applied Biology, University of Leeds, Leeds LS2 9JT, UK.
authors.forename: R S
authors.initials: RS
authors.lastname: James
authors.forename: I S
authors.initials: IS
authors.lastname: Young
authors.forename: V M
authors.initials: VM
authors.lastname: Cox
authors.forename: D F
authors.initials: DF
authors.lastname: Goldspink
authors.forename: J D
authors.initials: JD
authors.lastname: Altringham
mesh_terms: D000818:Animals; D007537:Isometric Contraction / Q000502:physiology*; D007551:Isotonic Contraction / Q000502:physiology*; D008954:Models, Biological; D018482:Muscle, Skeletal / Q000502:physiology*; D011817:Rabbits