I thought i had semi accurately performed the drift test inside, maybe slightly under how much percentage- like 2.8 drift from 135 bpm. On a recent outside hike TP sent me a notification that my new threshold is 147 bpm. This doesn’t feel right but now i fear i could be going too easy on myself- im generally not very fatigued at all post workout though. Has anyone else experienced a big difference from their inside measure and tp outside measure?