It looks like you're new here. If you want to get involved, click one of these buttons!
Please can anyone help! I am a regular outdoor runner but due to the dark nights and being a lone female runner I have been going a few times a week for the past couple of weeks on a treadmill. Past three times after about 5 minutes i have like an aching pain in my left leg (never my right) but when i run outside this never happens! Any ideas why this might be happening?