A

100 Rep Lunge Challenge

https://www.fitnessblender.com/videos/100-rep-lunge-challenge-thigh-toning-butt-lifting-lunge-workout

In the video, Kelli promises the give us a video with double the reps, which is to say, a rep on each side being one rep, if enough of us like the challenge. Deadlifts and squats get way more love than lunges, I feel, but they're essential to functionality and knee health, and my go-to sub for almost any move I can't do (e.g. deadlifts). No warm up or cool down needed, just all the lunges.