Back in January I did an AeT test at the local lab and they determined that my threshold (RER .85) was at 162bpm which I was happy with as this same time last year I was at 140.
Recently I’ve tried to do the HR drift test but it’s been difficult to really target 166bpm for the test to see if that’s where I’m at.
Heart rates aren’t that precise. Think in terms of 5-BPM buckets, not specific BPM values. Start your next test around 165 and see what happens.
Lately while doing the z2 workouts I’ve been finding that i’m feeling much more fatigued afterwords and that my energy level from day to day isn’t what it used to be.
This is normal. Your pace in Z2 has probably increased, so those workouts will be more fatiguing. The solution is to do less of Z2 and replace the volume with Z1.
I’m wondering if even though I may not quite be at the 10% if I should switch to zone 1 with the occasional z3 workout?
I’m also hoping that 30min was long enough of a testing time for the Anaerobic Threshold test? I’d like to not have to do that again as it threw me into an asthma attack afterwords.
Sounds like it was long enough!