I have gotten a few questions about why Eo3 Foundations does work and rest every other day AND what should be done on REST/RECOVERY days.
To answer A.) The Foundations has a lot of 100% Max Effort attempts, so you need to be well-rested and ready to tackle each workout.
To answer B.) You can do active rest like jog, row or jump rope at a low intensity for longer duration AND/OR you can being doing mobility workouts. Check out one in the video below.
Other than that...If you are doing Project Barbell (read details here), all the lifting we do in foundations is a great way to be a part of that project!