I started a beginners running programme 5 weeks ago with a trainer led session once a week and runs to complete in the week. I have got up to 3 mile runs and this week was tasked with 60 minute run but I bailed out at 44 minutes 4.2 miles. I always have a two Mile gremlin that puts my breathing off and my legs feel heavier. How can I push past this mental block? If I stop for a few seconds I can then go on again!! Also in time will my legs ever feel spritely rather than heavy like a lolloping elephant?