Today I have taken a day off running before the 8 weeks preparation to the 10k begins.
Tomorrow I am planning to do my first day with fast intervals, possibly on the track, with 2-3M warm-up, then 8 x 400m in 80/84 secs, with 2-min recoveries, then 1/3M (depending on the time) cool-down.
Risks include reaching the braking point of some muscle or tender or problems with joints. Hopefully i have prepared this quite well over the summer and dropping 12 Kg. in weight (which should help with the joints) .
I'll let you know how it goes
all the best for now