I'm vegan and I love running. I'm not an expert, but I would say eat more veggies and protein. i find thatt when I run, carbs and grains 'slow me down' but vegtables and protein keep my energy up for a run. I think it's pretty simple; eat well with the food guide (modified for your vegan diet) and keep on running. Of course, don't forget water! Drinking more water has really helped my skin but a downside is it takes a while to go through you and you could get a bit bloated. The good effects weigh out the bad, so I'd still go with more water. good luck !