I rode on the trainer (because it was raining) for 45 minutes and then ran 2 miles outside. man was that weird. at first i felt really light and quick, then after about 2 minutes i didnt feel so quick. I normally run 9:30 miles for distance and today each mile was 10:30 and then 11:30!! does this get easier. I am getting ready for my first tri in a month. how often should I do a brick? once a week, twice a week?