Is it better to breathe through your nose while running?

Breathing in your nose and out your mouth is an INEFFICIENT way to breathe as a runner. In most cases, your body is going to need much more oxygen than you can bring in through your nose and as a result, you will feel much more out of breath, etc.

I do not know why many people advocate breathing in nose/out mouth but it honestly isn't the best way. That is, unless you find it absolutely works for you. In general, though, more oxygen means less oxygen debt which means stronger muscles during a run.

To quote Hal Higdon (famous marathon coach) "when running I try to breathe any way I can". There is no right way. Some suggest the nose since it provide more of a filter. However, when working hard, it really just does not matter - get the oxygen any way you can.

breathing through your nose, out your mouth is the best way to breath while running.

If you train yourself to breath through your nose it allows you to breath more consistenly and that allows more oxygen into the lungs. This will most definetly help you in running.

it really does not matter i have done track and i breathe through my mouth its hard for me to breathe through my nose but its gud 2 try and i dnt thikn it makes much difference

In threw your nose out threw your mouth.