Today's training was very satisfying: I did in total 15-16km, including the following speedwork: 10 sets of (1min run at full speed, 30min jog). And then 1 set of 4min fast tempo, ie a bit faster than my 6km race last week.
I actually do enjoy running faster and raising the heart rate! I also think that after speedwork one feels more fresh due to the pumped adrenaline.
Tomorrow I will do a long run and on Sun I will do whatever my body dictates. Then I am planning to take a 3-day off from running and do more biking/walking/callisthenics/sleep. I would like to start the core of my marathon preparation in about 10-12days, and before that it is important that I have rested.