How Do I Know if I'm Over Threshold in a Road Race?

i've trained as much indoors as outdoors um well i i was actually happy somebody asked this because our one of our coaches katie has really funny legs in that like if she doesn't go hard the day before uh an event or yeah usually two days. The symptoms in her legs sound exactly like somebody who's threshold has dropped 30 or 40 wattsYeah and it's all like so wait we're gonna be old school Europeans here we're talking about the sensations the sensations of the legs right but i mean  she'll be like at threshold and she'll be like i was at threshold you know during my warm-up and it felt like i was over thresholdUm if it feels hard it