I'm hoping to tap the *huge* collective knowledge of Slowtwitch for some training and/or race execution advice:

I just finished my 3rd half iron distance race and have done many other Olympic and Sprint distance triathlons. Every time I race, I can't seem to keep my heart rate in check for the run, despite being able to run much faster when doing stand-alone runs with a much lower heart rate. I'm fueling right (I think) in terms of calories per hour and drinking plenty of electrolytes, and I have done consistent brick training this year in hopes of improving my run transitions (although my heart rate doesn't do well during brick training either). To be clear, my legs aren't tired and they have no problem turning over when I get off the bike. I just can't maintain my run at such a high heart rate (zone 5).

In analyzing my latest 70.3 data, my bike started in zone 5 and basically stayed there for the entire 2.5 hours. I'm wondering if perhaps I should start the bike a bit slower to allow my heart rate to come down from the swim - thoughts on this?

I'm having trouble figuring out how to approach my training and racing execution from here. First I reigned in my fueling, and then ramped up my brick training. But I still struggle on the run.

Any help would be great :)

Thanks!