Maxs Mum - I think DV is a good person to ask about swimming. He spent 18 hours in an attempt to swim the Channel as part of a multi-discipline event (he'd already run from London to Dover the day before), but the tides went against him. Anyway, he learned to do the whole swimming in the sea thing.
Hatter - triathlons. Mmm, not sure. I do my bike riding with these guys, one of whom is an ex-professional Kona type. I see that training just takes over the whole of life and I don't find that very appealing. I guess we can all choose at what level to train and there's no obligation to dye your hair blond like our young Engineer friend.
The Engineer - I could be fgalling into this same trap but don't have enough evidence yet to make any realiable conclusions. Having switched 50% of my training effort on to the bike, I think I am losing out on my top end VO2Max and flatter lactate curve. Translating into slower running.
I've consciously avoided the reall hard running training in order to protect my knees - and that has worked. I am running pain free these days.
But I haven't yet worked out how to do really hard workouts on the bike. I do some really tough hill circuits, good for power and I am certainly developing good endurance. But somehow I have a feeling this is not effective for my fitness as running 7x a week was using a highly structured programme. Mmmm, stuff to think about here. I feel like I need some new goals. At present they are centred around being able to do really long sportive rides (240km+ kind of rides simulating some of the classic races) but they are not really individual goals, because it's so different if you group ride as opposed to going solo and so much of the performance depends on those around you. So I can't do purely individual performance comparisons which somehow is less satisfying.
Anyone can go longer if they go slower... but I like going fast, be it running or biking. Like I said, stuff to mull over here. What sort of athlete do I want to be?