Cycling2:07:44 59.35 km (27.9 kph) +359m ahr:150 max:190
Randomly decided to do short a "maxout-test" on an uphill Strava segment. My best time last year (summer) was 6:38, this time 7:04 (+26" or +6.5% slower) with slower start due to people plus not as dry conditions. Last time 176 avg. and max 178 HR, this time avg. 182 and max 190 HR. So, I guess some muscle mass still exists.
If my average HR would not be too high all the time, still, I would be happy to utilize a bigger HR range, as I usually 'struggled' to properly get beyond 180.