Is it possible to measure the lactate threshold with an indoor trainer like the Tacx vortex in combination with a fenix 6? Or do I need a heart rate strap for this? Or is it not possible in general?
Is it possible to measure the lactate threshold with an indoor trainer like the Tacx vortex in combination with a fenix 6? Or do I need a heart rate strap for this? Or is it not possible in general?