Inuk, how does this challenge look like, exercises, intensity, reps, sets (volume)?
I currently train almost every day, within guidelines from easy strength, five exercises, 10 reps (take or give a few, swings some more reps). I am used to high-frequency training for quite some time. I vary the load in a session, and from session to session, try to fatigue as little as possible, doing my fast & loose in between sets, sleep around eight hours, eat sufficient. When training every day you definitely must keep intensity, volume thus fatigue in check to recover. Even when the volume and intensity seem low to moderate in a session, it can add up in a week, or two, or three, or four.