Clinical parameters, body composition and fat availability, exercise parameters, insulin sensitivity and MR-spectroscopy data in endurance trained athletes.

Values are indicated in mean ± SEM. BMI  =  body mass index; FFA  =  free fatty acids; suppression of EGP  =  suppression of endogenous glucose production  =  measure of hepatic insulin resistance; M-value  =  glucose infusion at high insulin dose  =  measure of peripheral (whole body) insulin resistance; IMCL  =  intramyocellular lipids; IHCL  =  intrahepatocellular lipids expressed as % of hepatic water signal; IMCL pre/IHCL pre  =  before exercise; IMCL post/IHCL post  =  post exercise; ΔIMCL/ΔIHCL  = 2h-aerobic exercise induced changes of IMCL/IHCL; α =  p-value <0.002; β  =  p value <0.001.