rayhuang said:... On todays and tomorrows training rides I'll mess around with splitting my rides into 3 intervals...
Sounds good Ray, I suspect you'll get hooked on running in interval mode. You don't actually need to display the running intervals (the effect of holding the left button down for several seconds at the beginning) you could run in full ride display but still trigger intervals with the quick double button press. That marks them in your file for later viewing. The beauty of running in interval display mode (where the interval number stays lit up all the time) is that all the display readings reflect only the interval you're currently performing. So things like average power, max pwr, avg HR, avg cadence, etc, are all related to the specific interval and not the entire ride.
The other cool thing is you can review your intervals while you're still riding and accumulating additional interval data. Say you finish a hard 2x20 session and you're noodling home on your cooldown. You can scroll till the interval number is active, hold down the right hand button for a few seconds and the interval number will show up with a little black circle with the letter M in the center. That means you're in memory mode and you can scroll through the intervals you've done and for each one scroll through all the readings like average power, average cadence, max pwr, energy expended, etc. This has very little value during a race but I've used it to help dial in my L5 and L6 efforts. Among other things it lets me check to see when I've done too many and am beginning to have trouble holding the desired power for the interval. The PT only stores 9 intervals for display, it actually tags the file with all of them but you can only use the memory playback function for the last 9. When you want to get back out of memory playback, just hold the right button down for several more seconds to toggle back to interval display mode.
Anyway, the PT has a lot of cool features but they take a bit of playing with to figure out if they're useful for your training and racing. I pretty much always ride in interval mode unless I'm just doing a totally unstructured group ride but I'd probably still want to seperate the ride itself from my WU and CD.
Good luck,
Dave