Update: deload week, half the volume of last couple weeks. Feeling springy, stairs feel good, aches and pains are melting away. Been training pretty much exclusively in Z1/Z2, no planned excursions above Z2 but a few accidental, and never very far above. Max str a couple times a week, no ME.
Had to walk to keep today’s run in Z1 (<135bpm); eventually said screw it and jogged slow. Last mile in 12:06 at average HR around 145-150. HR drift test in similar conditions about a month ago yielded a 9:54 pace at 147 HR. What’s going on?
“Residual fatigue from max str”–okay, but I’d expect this to feel like a higher RPE at same HR (and have actually experienced this in previous training cycles) and this wasn’t that–it felt really easy, I just couldn’t keep my heart rate down
“You accidentally found your AnT, not your AeT”–doubt it. I’ve averaged 7:20ish for 4 mi with a negative split (didn’t take HR), 7:00ish/190bpm for a 5k, and 173 HR for ~35min uphill hike within the last year, no major breaks or obvious acute regressions. I suppose I could be in good enough shape that a half-hour-ish effort won’t capture AnT, but look at my actual performances, I’m not exactly Kipchoge here.
“Instrumentation”–maybe, I didn’t notice anything weird at the time of the AeT test but I did notice some anomalous readings from that chest strap ~2 weeks later, changed the battery, still got weird readings, switched makes/models, have noticed nothing weird subsequently.
“Overtraining”–I can’t prove this isn’t it, but I don’t think my volumes (~10hr/week) are way out of line with previous training cycles (especially considering non-training activity volume), I don’t feel run-down or flat or whatever, I still want to get out the door and train, everything feels pretty easy. HR is just misbehaving wildly relative to pace while running. (Hill hiking seems to be behaving about as I would expect, though it’s obviously harder to control for surface, incline, etc.).
I’ll try a new AeT test fairly soon (not right away, I’m about to change location to a warmer climate and want to acclimate). What else can I do here? In general, what gives?