Observations of muscle lactate concentrations when comparing HT with AT was an unexpected result, given that the mechanisms which increase glycogenolysis would most likely increase lactate. Previous studies had compared the effect of elevated muscle temperature on CHO metabolism during submaximal exercise (Febbraio, 1996) which demonstrated increased muscle lactate accumulation with heating, further supported by (Young, 1985; Febbraio. 1994; Hargreaves, 1996) which consistently observed increases in muscle lactate concentrations during exercise in
