Don’t Wear It Loose
How you wear wristwatches often comes down to personal preference. Some people like to wear their watches snug, while others keep it much looser. Having a preference is fine, but a loose-fitting Apple Watch may actually be less accurate.
Apple recommends that you wear your Apple Watch snug against your wrist, but not too tight. If you like your bands to be looser than snug, another option is to tighten it for workouts and loosen it for everyday wear.