Incorrect Apple workout data for indoor bike workout connected to gym equipment

Apple Watch Ultra 3

iPhone 16 Max Pro

latest OS (26.2)

indoor exercise bike C6


during workout the speed and distance seems to be off.


Apple workout shows for example speed of 192.8 mph anytime the bike speed is above say 20 mph. Apple shows 185.4 where as bike shows 18.5


for Distance bik shows 8 (miles) and pole shows 0.8


looks like the calculation formula has gone wrong.


Posted on Dec 14, 2025 7:03 AM

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Question marked as Top-ranking reply

Posted on Dec 15, 2025 2:39 PM

The only accurate distance uses gps. As you are not actually moving it is an estimate only, therefore expect some inaccuracy.

However such extreme inaccuracy suggests some of your physical health details may be wrong, eg 6cm instead of 6 feet tall

in iPhone, Watch app, My Watch tab, Health, health details.

1 reply
Question marked as Top-ranking reply

Dec 15, 2025 2:39 PM in response to vipzon

The only accurate distance uses gps. As you are not actually moving it is an estimate only, therefore expect some inaccuracy.

However such extreme inaccuracy suggests some of your physical health details may be wrong, eg 6cm instead of 6 feet tall

in iPhone, Watch app, My Watch tab, Health, health details.

Incorrect Apple workout data for indoor bike workout connected to gym equipment

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