rage.brisingir6 years ago000Is the chest strap also worthwhile for indoor use? I'm looking for something for martial arts where I can't wear my Fenix 5s and for interval training indoors and outdoors.Show in original language (German)matthiasgubler6 years ago • purchased this product-10-1purchased this productI also use the belt for fitness and HIIT and am very happy with it. It fits, doesn't get in the way, doesn't slip and is still accurate.Show in original language (German)Comment