According to the manufacturer, this is possible, the watch also recognises this sport and is water resistant 5 ATM

Do not go swimming with this watch. I've had a watch like this for 2 years and 4 months. Never in the water, never showered with it, only when washing my hands (or when it rains) have I not always taken it off. For about 10 days it has had water (condensation) in the case. Of course, no more warranty, no one will repair it. Withings support not bad at first: offers 25% off a new device, then backs out and excludes all new devices (e.g. ScanWatchHorizon) from this voucher.
Also, read carefully the Withings advice for using this watch in water. There are quite a few....