Super Speed...needed

My post Kili climb marathon training has been, shall we say, subdued. I blame my legs still being a bit tight/sore after the climb (whinge, whinge). I struggled with an hour and a half run on Saturday. Two 30 minute 'threshold' runs on the last two days have hurt. Feeling a bit dubious about the Kilimanjaro marathon at the mo...and its getting closer (Feb 27th)! Time is running faster and faster. I am (to date) not.