To each his own. I think I’m also in the one day off per week camp.When all goes right, I exercise and practice every day except Sunday. Sunday is for relaxing and recharging. A normal Sunday looks like today: Grocery shopping-->Laundry-->make lunches for the week-->go for a bike ride with a friend-->dinner/hang with my wife.
Although today I will probably do a 30 minute calibration session on the bass before the bike ride because yesterday was too busy and I didn't get to play at all.