I have been using a Garmin Vivoactive 3 for the past 5 years. I am a regular swimmer.
When I jump into the swimming pool, I am usually doing 100 lengths (2500m) in one go.
My old Vivoactive 3 suggests I usually burn around 1100 kcal during such swimming session.
I have upgraded to Vivoactive 5, went to swimming pool this morning, done the usual distance and watch says I have burned about 750 kcal.
That is a massive difference! And I am pretty sure V3 was closer to truth than V5. Below a comparison of two recent swims:
| Model | Vivoactive 3 | Vivoactive 5 |
| Date | 19/07/2024 | 22/07/2024 |
| Distance | 2500m | 2500m |
| Time | 54:20 | 52:28 |
| Avg Pace | 2:10 | 2:06 |
| Total Strokes | 1336 | 1370 |
| Calories | 1128 kcal | 756 kcal |
Where does that difference come from? I have confirmed that a correct pool size was selected.
There are only 3 days difference between these swims, so body mass change will be irrelevant.
New watch has my correct profile - age, weight, height are all correct.
Any ideas?
Interestingly, values of active calories for outdoor walking between Vivoactive 3 and Vivoactive 5 are similar.
I am a regular swimmer, so these values are important to me.
