I had for a while now noted that my Edge 530 would report post ride (most being ~1.5hr / 280NP types) that my anaerobic scores were 0.0, with all being aerobic. Based on the rides this clearly wasn't true. I was pretty sure that I had input indicative Max HR (based on max's achieved in the field on any given day and adding a couple of beats to reflect that I'd never truly been going all out).

Anyway so I went into Garmin Connect and noted that somehow my Max was in there as 213 (I'm 46, have been doing a lot of riding this year, consistently and deem my bike fitness to be close to as good as it's ever been). Anyway so I reset my max to 188 (I'd seen a handful of numbers over 180, but generally short, hard climbs might reach more mid 170's. The anaerobic scores suddenly came to life but seem to have gone too far. As an example here are the numbers for the same river loop (small group) ride I did either side of the adjustment, which was made on the weekend. Before was last Tuesday, After was today (Tuesday)

Before After
Distance 50km 50km
Duration 1:27:12 1:28:44
Avg Power 230 w 227 w
NP 277 w 280 w
Avg HR 150 bpm 144 bpm
Max HR 183 bpm 174 bpm
Calories 1207 kJ 1210 kJ
Aerobic Score 3.0 4.0
Anaerobic Score 0.0 3.4
Exercise Load 71 263
Training Benefit Tempo Sprint
Max HR Set 213 188
Training Status Productive Unproductive
VO2 65 62

I'm not really a slave to these numbers but it would be nice to have something that is somewhat representative of reality.