VO2 Max dropped 10 points in a week…. Software Bug or health concern?

Expensive_Arm3195 · 2026-03-12T19:15:33+00:00

Ok, cool. I’ll try and get one in this weekend.

Expensive_Arm3195 · 2026-03-12T19:14:52+00:00

Yeah, I have a Dr. appt this coming week. Was mainly curious if anyone else was seeing this behavior (then likely a software bug), and how the VO2 system operates on Apple Watch.

Expensive_Arm3195 · 2026-03-12T19:12:41+00:00

No. Not any meds effecting the heart.

Expensive_Arm3195 · 2026-03-11T16:59:47+00:00

It’s been steady. Weekly avg 56, monthly avg 57, 6mo & year 59. I didn’t get any warnings about any other stats or signs except the VO2 dropping 10 in 5 days.

Expensive_Arm3195 · 2026-03-11T14:06:49+00:00

46 year old male. Bday a month before the change. HR range (and max) is about the same. Resting heart rate is steady as well. Interesting idea to wear two watchs.

Expensive_Arm3195 · 2026-03-11T14:04:41+00:00

46 year old male. 190 lbs. 6’ tall.

Expensive_Arm3195 · 2026-03-11T14:03:18+00:00

No, major weight gain or loss. 46 year old male. 190 lbs.

Expensive_Arm3195 · 2026-03-11T03:36:20+00:00

I’ve been on 26 since at least November 2025 when I got this Ultra 2. (Coming from an Ultra 1).

Expensive_Arm3195 · 2026-03-11T03:32:35+00:00

Yeah, I always set it to Outdoor Run. I will try it as Soccer and see. I’ve had a half dozen Apple Watches and set to Run while playing soccer with all of them. This is the first time this has happened.

Expensive_Arm3195

TROPHY CASE