Please click Settings > Privacy > Exercise > on iPhone, then turn off fitness tracking, and then turn off Bluetooth on iPhone. The wireless or traffic network on the iPhone cannot be turned off, which has no effect on the fitness activities on the Apple Watch. Add: 1. Open the Apple Watch app on the iPhone. 2. tap my watch, go to health > health details, and then tap edit. 3. Click "Height" or "Weight" and make adjustments. Apple Watch uses the height, weight, gender, age and wheelchair status information you provide to calculate calories burned, distance traveled and other data. The more times you use the "Physical Training" App to exercise, the more Apple Watch will know about your exercise level and more accurately estimate the calories burned during aerobic activities.