Posted: Today at 10:47
I have run a few marathons. I do a couple of hard interval sessions of around 45 minutes each, 2 or 3 spin classes (one endurance of 90 minutes), strength training/weights when I can and I do one long run (14+ miles) or long, hilly bike ride every week. About 6-8 weeks prior to the actual marathon event I will make sure I do a long run every weekend, building from 14 miles up to around 20/21 miles 3 weeks prior.
I have to mix my training completely up. When I followed a marathon training plan which seemed to be 90% running related, I got injured. Everyone is different, but I think he might struggle if he doesn't build a good cardio and endurance base. There are so many more knowledgeable people who know what they're talkign about on this forum though. I'm a mere novice in comparison, but do a lot of endurance events.