Tony said:
While its difficult at first to get an idea of LTHR, and it will change
(become higher) over time, if you exercise too close to LTHR or above it too
often, your training won't be effective. Training programs based on LTHR
take into account (and I think more directly train) the energy supply
system.
I suggest at first use your heart-rate monitor as a biofeedback tool only;
learn your body's response to exercise from it. Judge your pace with other
factors, such as whether or not you can talk comfortably when running.
I agree with Tony. When starting, it's far easier to use conversational
effort as a guideline. Where your speech starts breaking up, then only
gasping words (breathing harder), you're probably approaching the (85-)
90% max hr zone or (80-) 85% Karvonen or heart rate reserve of the LT hr
zone (approximate numbers). It's using hard breathing as a surrogate for
LT. This might not be completely true, but it's a good guideline for
starters.
As Tony said, this targets the energy systems better, esp. if your max
hr emphasis might be off.
Not sure if yours is a downloadable version or not, but looking at
post-run graphs of hr can be instructive.
Another thought after you get a feel for things is to try estimating
your current hr while running at certain efforts, then look at your hrm
to check.
Good luck with your new tool.
Dot
--
"So many people get stuck in the routine of life that their dreams waste
away. This is about living the dream." - Cave Dog