I'm looking forward to giving this a try as crosstraining on my off running days. The plan is to run 3 days per week and crosstrain 3 days a week with one rest day.
It's going to take self-discipline. I can't let it up though. I did, after all, just "get" my kipping pull up this week!
But...it'll be good for me and I'll be darn glad I started making these marathons a priority when the day(s) come.