groovy. i figured as much. to give jock a little background on what the conditions were: this was done on a stationary trainer , as it normally is. did a 10 min warm up, some short sprints etc. rested for 2 mins, then brought the HR up 150 or so. gearing was 53:15, in the hardest trainer setting. started timer on polar, went as hard as possible for 8 minutes, stopped timer, spun for 10 mins, with a couple of smaller sprints, then repeat.