You did the Maffetone method applied to endurance work? Running? and if so where did you have your issues
I was using Maffetone in support of running at half-marathon distances. My complaints are not with his core insight. Aerobic Deficiency Syndrome really is a thing and the only answer is putting in time below the Aerobic Threshold (AeT - which he approximates with the MAF number).
The problems I had with his method is that there really is no method in
The Big Book of Endurance. MAF is a really crude measure that has almost no room for variability between individuals or even conditioning and it is way to monotonic with age. While your MAF might have been too high, mine was clearly too low, but I didn't have any guidance on how to determine the right level.
Uphill Athlete is clear that MAF runs too low for a lot of athletes. That is fine in that it is conservative, but not optimal. Worse, the book really doesn't have much guidance on time needed or training plans. I imagine if I was an overtrained triathlete more of it would have applied, but it just wasn't meant for someone looking to incorporate running into an overall fitness program. I ended up using
80/20 Running by Matt Fittgerald and had good luck with it. The idea of spending a lot of time sub-AeT is not unique to Maffetone.
But the best teacher is experience. Now I have a really good feel for what how much to train and how training at 118, 128, or 138 bpm does for me. All are good, but they build my aerobic system in different ways.
Uphill Athlete clarified a lot for me and matched my experience, but it's a big book. Al's
article on training for the Air Force PT test is more than enough to get anyone started in the right direction.
The whole picture of A+A is the alactics and the aerobics: snatch & run.
The combo is amazing. I am rucking, running, doing Q&D and some mobility work. The whole package is doing wonders for me and gives me a lot more than it takes.