Badminton Activity Recording

Hi there

One question, maybe you can help me or have a good idea. I have the Venu 3 since two weeks now and it´s the second time I recorded my Badminton Activity yesterday evening. Both recordings are similar and not correct in my opinion. Beside of breaks I was appriximately one and half hours on the court but I moved only 270m with 4000 steps. Without GPS because inhouse. My previous watch recorded two to three times higher values. (For the steps, not for the meters.) 

Do someone has similar experiences recording Badminton?

Regards, Joerg