A Brick?

[Tri Girl]

That's about right for me in my training. You can do any length brick that you want. It kinda depends on the kind of race you're training for. For sprints your bricks can be short, for longer races, they need to be longer.
For me, I try to do a brick at least once a week during the season, and for about 2 months prior to any long distance race, I do 2 bricks a week (one long and one short). On long run days (usually anything over an hour run), I usually like to do a reverse brick. I spin really easy on the trainer for about 15-30 min (depending on the length of the run). I've noticed that it really helps to flush the lactic acid from my legs and they feel a lot better the next day, but so does sitting in ice cold water for 5 min. The bike just doesn't freeze my skin off. Just my thoughts, and I'm sure others will have much better info than me.