Training regimen ... a lot of BRICKS

You're doing the bricks for time crunched and scheduling reasons, right?

I do combined workouts through most of the Tri Season.

I bike commute to work and most of my morning workouts (Swim and/or Run) include a bike segment at either end.  A go to workout for lunch is to run down to the beach by my office and get in a quick swim in the ocean before running back to work.

Friday's for example: I start out at the beach, get in an 8-10 mile run, then do my weekly club swim (usually 2,000 meters) in the ocean before heading to work on my bike (15 Miles). At lunch I do a typical aquathon (Run to the beach and swim. (8 mile run, 1000 meter swim) and after work, do a longer ride back to my car at the beach. (30-50 miles)

It typically nets out to 5-6 hours of training and for me at least, is an awesome day. Saturday is almost always a recovery day to set me up for long workouts on Sunday.

I guess its all about the planning and making it work with your abilities and your schedule.

Some say combined workouts are not ideal, but at 48 I am still setting personal bests and placing very high in the standings so I will stick with what I am doing at least until I get bored.

Yes ... I am crunched on time and schedule so it works out best for me to get in both while I'm out.  Again, I've seen steady improvement in pace and endurance and any aches or pains are minor.  So this indicates to me that intensity levels are about right.

Just my opinion, but if that's how you can get your training in, that's how you get it in.  I often do some type of brick if I can't schedule it any other way, or if I sleep in in the morning

I do try to keep key workouts separated, as quality will trump quantity IMO.  So my long run I try to keep away from anything else, although I do often swim later that same day

Doing two, or even three, workouts in a day doesn't necessarily make it a brick.......in fact, mostly it's not. 

Thanks all for the feedback.  Again I'm testing the water here as to overdoing it and this working against me in the overall.  Sounds like this is a common practice amongst triathletes.  One clarification on my workouts - I move right from one sport to the other while at the gym ... this isn't a morning swim - lunch or evening run or cycle. 

Sounds like as long as I'm conservative with intensity, I should be able to keep this up without injury, which is what I was most concerned about.