• Question: Why is it, when you run a long distance your legs feel heavy? Is this due to blood being pumped into your legs more or is it because they ache? Lactic acid?

    Asked by jiggles to Amylou, Maria, Mark L, Mark U, Faye, Martin, Mus, Pete on 21 Jun 2012. This question was also asked by ells8.
    • Photo: Mark Uphill

      Mark Uphill answered on 21 Jun 2012:

      Hi jiggles, it’s been a long time since I’ve run a long way…. I think there are probably a number of reasons why your legs could feel heavy, but if this is unusual or painful it might be worth checking it out…