Quick BT Training Plan Question

I am wrapping up that plan right now.  When it first started out, I was doing an hour long body pump class for my strength twice a week.  As it progressed, and my three sports training sessions increased in volume and intensity, I found I needed that time in the morning to sleep and recover.  I believe the plan even says that if you need to drop a workout, drop the strength first.  In it's place I would ride a little longer.  Basically do the plan's ride, then tack on 10-20 more miles.  I did this because I wanted to do a century (and successfully did one).  If you need some swim work, get some paddles and add 500 yards here and there, or do some extra kick drills.  Maybe even... dare I say... the dreaded butterfly.  It's a fantastic core workout that counts as time in the pool.  I would also try to throw in an extra 5k here and there if my legs felt fresh and it wasn't a high volume run week.  Just something local.  $20 to a local church or charity, free t-shirt, and three miles added volume to the run total.

I actually can't remember the last time I did a strength session outside of basic core work.  The swim/bike/run sessions can get pretty intense if you do them the way they were intended, and you will probably find that recovery will become a bigger and bigger issue.

Ride more is good.  Also, if hills or riding into the wind; ergo bike power is a limiter, try some hill repeats on the bike.  Running hills will help with run strength.  Core exercises (crunches, obliques, planks, supermans, stretching) are a great alternative as well.