Your body recovers and repairs in your sleep, so it makes sense to rest. But only first if you have done the right training in the week. A lot of people don't workout on a Sunday, but in my opinion, Sunday's are the perfect day to train. More time, less commitments, and generally the gym or park is pretty quiet! It gives you time to workout without having to rush off for work, or back home for your evening meal.
If you need a rest day, take it, but don't take your foot off the peddle too much. Go for a relaxing swim, or a walk in the park, or a cycle along the river. Keep your body moving.
My advice is to only rest when you feel you need it. If you have been doing intense workouts all week, you need a recovery yoga session I am sure. If you only train a couple of times a week, use your weekends as an extra workout.
If your results aren't getting any closer and you are training ALOT, then you could be over training, and really need a rest. I will talk about over training this week.
Have a nice Rest Day, whatever that means to you
Do you take rest days? Rest days can be a huge part of your programme. Whether you are looking to torch body fat, build lean muscle or are working towards a distance race, your body needs to rest.