And it 's far less invasive and should be much easier to use .
Reading the fraction of a runner 's blood that is oxygenated , BSX says , translates very closely to blood lactate concentration , the gold standard in laboratory - based intensity monitoring .
It 's far less invasive and should be much easier to use .
Reading the fraction of a runner 's blood that is oxygenated , BSX says , translates very closely to blood lactate concentration , the gold standard in laboratory - based intensity monitoring .