This doesn't specifically apply to cross but I figure there are some knowledgeable people on here.
I seem to be having trouble recovering the last few days. I pretty much took a break from training over the Christmas period, then picked up again with some running on Sunday evening. Only ran for about 30 minutes, not too hard.
I seem to have struggled to recover for some reason, with my muscles feeling almost bruised. This has carried on for the last two days - I've done no more real training - and then are still a little tender today to press. Any ideas why this would be? I've no had any major problems all season.
That's funny. I did the same thing you did. Took a quick break and started running the day after X-mas. I only ran for 20 mins. The next 3 days I could hardly walk. I have ran 2 more times since and did not have any more soreness. Like the other guys said... how long has it been since you ran? This is probably the issue. You are working different muscle groups and causing your quads to flop around and pound in your legs with every step. I would say try to run again. You should be OK.
Nutrition would have been my next guess. Especially lack of proper hydration will affect fatigue and soreness. With all the candy, baked goods, and beer around and lack of normal routines, it all adds up.