Duck, calf does help with elastic rebound on the achilles, which is exactly why stretching it too far would result in poorer performance for the likes of you and I in the shorter stuff (though I need you to slow down on those 200s as you're nearly at my PB on your reps!). A long elastic string rebounds slower than a short one. All I think is that there's an amount of flexibility you need to avoid injury from stretching/pulling, and then that's it, because more flexible could lead to deteriorating performance. That said, when you're me, it's not going to make that much difference in performance and it's better not to be injured!
Treadmill, I only said I couldn't touch my toes on the morning of my 41st b'day!
PBs at every distance I raced through 40, and PBs at the one distance I've raced since I hit 41. Actually I got a PB today too, but I've never raced 10300m before.
And what a wierd weekend!? Did the sprint session on Thursday, because it was 3 sets of 3x200 with 30s between reps, and 5mins between sets. It seemed quite endurance based to me. It was followed by 3 form 100s to ease down. But on Thursday a family emergency caused problems, meaning a weekend away got cancelled. So I did nothing yesterday, and told my club I'd be up for turning up at the league XC today. 10300m on the flat. Plenty muddy, but flat is hard! I mean you try to keep top pace all the way and there's no downhills to rest on (or uphills
). So no results and no time yet, apart from I came 115, 21 places higher than the last race. Think I scored for our A team this time as well. Don't think the day off helped much, but better than doing a parkrun the day before!
Oh, and wierd I mentioned somewhere earlier about travelling further if I was selected for something. Selected to represent East Wales in XC with a trip to mid-Wales in early December! 

(They must be desperate...)
Good luck tomorrow, PP. I can't touch my elbows together behind my back. And I heard about a decent parkrun today...