Heavy legs during run

Congrats on the first training log today!

So how's your post workout recovery & nutrition?  I find that it makes a difference in how I recover and can train the next day or two.  How about electrolyte supplementing? I know here in FL when it starts to get warmer it changes from the winter training.

Ah trapped by the HR reading before acclimation!  Learn the RPE vs HR relationship, it will help with the pace vs feel as the weather gets warmer.

A wise man once told me!
"Use the scale Ron copied - that's what I use as a guideline. Learn to use RPE and HR together. Some days (especially) hot ones, the HR won't mean much and you'll have to rely on RPE.
Mike"

Not a wasted run, look what was learned

I limit wearing my HR these days just so I don't get trapped by it.  For recovery run & rides, yes it is good to use to prevent yourself from over doing it.  When I'm acclimated to the summer weather it's not all that much different than the winter months other than having to compensate for drift due to the heat.  Hydration levels more than anything will affect the HR, I always run with fluids (fuel belt).  Do the LT tests and you really cannot go to wrong using the HRM & RPE for training.

You know, from running real slow the other day, you probably had more vertical motion in your running form than usual, this will beat up the legs.  when you need to run slower, make sure you try and keep the stride count up where it should be but shorten the stride length.  This will limit your up & down motion which is wasted energy.