You're going to start mid-way through a full marathon training program to train for a half?
Yea, why not? Seriously, if I'm training for a half that's months away, what do I between now and then? Just lather-rinse-repeat what I've been doing for the last 3-4 weeks? Help a brother out.My thought was with the LR's on Saturday take them nice and easy and just see how far I get, more miles <> a bad thing, right? If I don't make it to the distance I don't make it. I'm not of the opinion that I could make a 20 mile run nor do I aspire to run a marathon but in January I wold have laughed at you if you told me I was going to be making 10 mile runs on a consistent basis so why not give it a shot. Flawed logic? Train me up, I'm the new guy to this distance stuff.
Other runners here will probably have different advice than me, but here's my two cents.The half marathon is basically an extremely long tempo run, done just barely slower than LT (lactate threshold) pace. Endurance is important, and I'm a big fan of training out to 15-16 miles to prepare for these, but this is a distance where you can benefit greatly from race-specific speedwork. That means tempo runs and maybe some long intervals. In other words, the gains from extending your long run from 15 miles to 20 miles are very small, whereas the gains from working in a weekly speed session are relatively large.
One thing about marathon training that really works well with the half is your mid-week medium-long runs. Those help out a lot with endurance, especially at this distance, without beating you down or requiring much in the way of recovery.
As a conversation starter, here's what I did when I was preparing for my last HM. I don't know how many days per week you run. I'm assuming five, if you're doing four then just drop one of the recovery runs.
Day 1: 9-10 miles with 5-6 at LT
or 5 x 800 (alternate weekly). You could try 3 x 1600 if you don't like 800s.
Day 2: 5 recovery
Day 3: 10 easy
Day 4: 5 recovery
Day 5: 12-16 easy
Mix in SDOs as you feel appropriate. Again, this is just my take, but it worked for me.