If you like a funny running t-shirt then check out this hedgejog t-shirt.
On this running t-shirt you can see a runner and the runner is a hedgehog and it is even wearing a pair of shorts and it brought some water as it is going for a long run and wants to stay hydrated.
As this t-shirt is fun it will look great when you go outside as runners you meet will notice it and maybe that gives them the extra motivation they need to keep going strong for a couple more miles.