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What strap should I use for sports?
If you want to measure your heart rate while practicing a sport, you have to wear a rubber strap. To ensure the heart rate sensor's optimal performance, please make sure that your watch and strap are tightly fitted to your wrist.
We don't recommend wearing a steel bracelet as it may be difficult to tighten correctly.
If you want to use the sensors during your sports sessions, please follow the instructions in the following tutorial: 
    
 
  
  We don't recommend wearing a steel bracelet as it may be difficult to tighten correctly.
If you want to use the sensors during your sports sessions, please follow the instructions in the following tutorial: