How many rest days do you have? Just interested at the moment because I'm trying to build up to 10K and find I may still need 2 rest days. For example I currently run Mon,Wed,Thur,Sat and Sun. Sun normally being a longer run day. I have intervals or hill training on Weds. Sometimes I'll do an easy run on a Tues. Is this too much? I am enjoying running and had no injuries so far. How can you tell if you really need a forced rest day? I know I was tired yesterday I had to take myself to bed early and slept for 10hrs - I normally sleep for around 8h. I just felt really tired and I'm a bit tired today (tues). So I've forced myself to have complete rest day.