Hi there, @Sandrar1918. Welcome to the Fitbit Community Forums. Thanks for the details provided in your post, I will be glad to help you with your concern.
Your Fitbit device records your swims even if you’re a novice swimmer, meaning you can swim about 6 to 12 lengths of the pool without stopping to rest. If you’re unable to swim this distance, you may notice inconsistencies in your swim data including some lengths not counted. As your swimming ability improves, you’ll likely notice fewer inconsistencies in your data.
Inconsistencies in your swim data may be caused by any of the following:
- You completed only a few laps
- You stopped to rest multiple times or in the middle of the pool
- You stopped to rest for longer than 60 seconds after completing a pool length
- You changed your stroke type midway through a length
- You swam with a kickboard or without using your arms
- You swam less than the minimum duration needed for your swim to be automatically recognized
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