Muscle fibre profile area (Af), volume density (V<sub>v</sub>), capillary-to-fibre ratio (CF) and number of capillaries per fibre square millimetre (CD) were determined from Media needle biopsies of vastus lateralis of twenty-four male volunteers (mean ± SD: age 25.4±5.8 years, height 178.6±5.5 cm, body mass 7