Your regular complaints about 30 minute warm ups give me hope.
Actually, it wasn't creaking bones and muscles (at least not after the first 5 minutes) - I just felt weak for the first 6k or so. Was quite surprised to snap out of it - normally if I start like that it's a struggle most of the way.
The Thursday long run is usually a pretty tough one. Partly that's because I'm doing two hard days back to back (and two hard runs about 12 hours apart), something I do on purpose because a weakness I've had in the last couple of years is that I often haven't been able to put together two days on a weekend (I ran poorly on both Sundays of the WA carnival, for example). Lack of sleep is usually an issue too.
Could be more relevent to knock out two faster sessions back to back? Its a bit different to do a fast session and then a long session even if it is a tough training combo.
Yeah I have found it can really help to do a couple of really good tough sessions back to back. There is no way I would do that all year though just during short periods when i am concentrating on doing really good hard quality training. I think it can be really good to make the second session an orienteering race or simulated orienteering race type session when it gets closer to the competition season - that way you are practicing racing well after doing a hard session the day before.