Hey girls and boys,
I report back finally with some sort of sensible results, and thought my process of figuring this out might be helpful for someone else. Yesterday I completed my 3rd drift test and got a steady and sure 4.2% drift that looked right on analyzing, AND also felt right.
Test 1: 12.5% @ 2.6mph
In early Sept I did a test and, assuming I am not fit, targeted 120bpm. I figured if I undershot, it’d be a clear no-drift. Completed on a treadmill, I analyzed and saw a 3.4% drift. I thought “OK, so I am in bad cardio shape for my age, this must be my AeT”. Over Sept I did a lot of “Z2” work based on that number (so like…110bpm), and I noticed that I basically never felt stressed in any way, and it always felt very easy. I could probably sing the whole time without missing a beat. Hmm.
Test 2: 13.5% @ 2.8mph
On our assigned drift test day first week of Oct, I did another drift test, this time targeting 125 “just to see”. To my surprise, I had 0% drift…maybe even slightly negative, and it still felt very easy. Bizarre, and Mark Postle said ‘do it again higher’. He suggested 130, but I had done a couple things there and it all felt easy, so I figured “lets try to surpass my threshold and get a very clear drift above 5%”
Test 3: 15% @ 3 mph
Yesterday I repeated the test, but targeted 140bpm. ALRIGHT, finally, it felt like I was doing work, but not too hard, and I would not please an audience with any singing. Total effort was 1h25m after a good warmup toying with speed. I had a 5bpm drift over the test, starting HR of 140, first half ~143, second half ~149, so 4.2% drift. 140bpm for my 35 year old age also happens to be must closer to where I “should be”.
I haven’t done extended treadmill anything ever, so I think my first test’s drift was just modality newness and my body’s surprise. The key with test one and two is they did not feel like I was working, and should have heeded that more. The last test was definitely at my “nose breathing boundary”. I realize I should have just followed the “180-35” guideline and started at 145, that would have gotten me real close up front. Alas, I’m scared of overtraining and figured there would be no harm to undershooting at first.
Happy Tuesday to you all from Jacksonville, FL!