I paid the interval sacrifices to the watch today, zone 5, up hill, 16 intervals, and it's still giving me "low aerobic"!
Cheeky watch!
#AreYouNotPleased #Intervals #HRZone5 #Run #HillTraining #UltraTrail
#ultratrail #hilltraining #run #hrzone5 #intervals #areyounotpleased