Is this like a deload week or something? I’ve never rested for an entire week unless it was due to injury, illness or personal reasons.
What I would suggest, though, is, at a minimum, stretch if you do not do it already. Look into “Limber 11,” use a foam roller/lacrosse ball, do some static stretching in the morning and/or before bed, etc. I bought a cheap yoga mat off of Amazon for the last reason.
If you want to train your muscles, but at a sub standard capacity, just do lighter weights and higher repetitions, regardless of the exercise. For example, say your bench press workout is usually 4 sets of 10 reps at 150 lb, drop it down to maybe 120 lb and do 4 sets of 15-20 reps.
And a good ab routine, although I may get chastised for saying this, is “8 Minute Abs.” It’s a video from like the 90’s that was a big hit. You can tell it’s dated due to their attire, the quality, the environment, etc. But whatever, what matters is contained within the workout. It’s 8 straight minutes of abdominal exercises and doesn’t include sit-ups. It’s free on YouTube, so this is why I push people this way.
If you want something else, something I do with clients is supersetting Crunches, Reverse Crunches and Planks. Do 10 Crunches, 10 Reverse Crunches, and 10-15 seconds of Plank, all in rapid succession, but with good form and good timing of repetitions. Rest 30-60 seconds and repeat 3-4 more times.