I run 2 miles a day how often i should take a day off... ?

Answer:
My old personal trainer told me that one is supposed to take one day off no matter what kind of exercise one does.

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You don't really need to, that isn't a lot of running.

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You should probably take an interval day range of 1-2 days if you run every single day. If you don't want to take a day off, run a less distance.

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Probably 1-2 days, I run about 5 miles every sat. and sun. and I usually take a good 1-2 days off.

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You don't say how old you are or what level of fitness you have so it is a little harder to say.
The most important thing is that you are wearing the correct footwear. Why? Because injuries occur most often due to over training compared to your level of fitness and not wearing the proper running shoe.
However if you are reasonably fit and have no injuries then you really aren't doing a mileage high enough to absolutely require a break. What you might want to do is make the seventh day a good walk rather than a run.
If on the other hand you are over weight and using running to lose weight, then in that case, run 3 days in a row and then 4th day walk. Then 3 days running 4th day off until your fitness level goes up.
You might then want to increase your mileage by say varying the milage of the 3rd day in each running sequence by an extra mile.
IE 2,2,3,2W..2,2,3 off. Do that say 2 x thru and then change up
IE 2,3,3,3W..2,3,3 off Do that say 2 x thru and then change up
IE 3,3 4 off... 3,3,4 off
as you can see you are gradually increasing distance without strain, and because you have gone up you take a rest every 4th day.
Listen to your body though.
I would, once you get to 3,3,4 ..stay at that distance but try and gradually drop down your times.
Then once you get to a plateau on times you might want to start to increase your distance again.
You might even want to throw in a couple of different runs, do something like fartlek training or a couple of interval sessions.Good luck with your running it is a great way to take the strain from the day and revitalise the brain

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