ABSTRACT STEPTO, NK, DT MARTIN, KE FALLON, and JA HAWLEY. Metabolic demands
of intense aerobic interval training in competitive cyclists. Med. Sci. Sports Exerc., Vol. 33,
No. 2, 2001, pp. 303–310. Purpose: To investigate the metabolic demands of a single
session of intense aerobic interval training in highly trained competitive endurance cyclists.
Methods: Seven cyclists (peak O2 uptake [VO2peak] 5.14 0.23 L. min 1, mean SD)
performed 8 5 min work bouts at 86 2% of VO2peak with 60-s recovery. Muscle biopsies …

Purpose: To investigate the metabolic demands of a single session of intense aerobic
interval training in highly trained competitive endurance cyclists. Methods: Seven cyclists
(peak O2 uptake [O2peak] 5.14+/-0.23 L. min-1, mean+/-SD) performed 8 x 5 min work bouts
at 86+/-2% of O2peak with 60-s recovery. Muscle biopsies were taken from the vastus
lateralis immediately before and after the training session, whereas pulmonary gas
exchange and venous blood were sampled at regular intervals throughout exercise. Results …