I dont know if they still sell them but all the old polar watches used to do this. Downside is you need a chest strap and you can’t download the data from the watch.
You can get cheap second hand ones online. I would have recommended the rcx5 except the straps break and it’s impossible to buy new ones…
I dont know if they still sell them but all the old polar watches used to do this. Downside is you need a chest strap and you can’t download the data from the watch.
You can get cheap second hand ones online. I would have recommended the rcx5 except the straps break and it’s impossible to buy new ones…