The last 2 times I've been running I've picked up a muscular back injury? The first time my left lat side ceased up a bit. I managed to finnish the run but had it for a couple of days afterwards. Yesterday I ran as usual and all seemed well until I came back home and felt a niggle in my back (rhomboids?) it steadily got worse throughout the night and again I'm still carrying it today. What with this? I do a light stretch before and a 5 min walk before I start the run and stretch afterwards. Can anyone help me here who also runs and has maybe experienced this. Cheers.