Resuming training again

It feels good to be training again after one week(9 days) of total rest. This week is scheduled for preparation. That means I'm using a low workload on all workouts to allow the body to prepare for a tougher schedule in the weeks to come.
In the third quarter I've scheduled a total of 82 workouts distributed on strength(7), flexiblity(9), swimming(8), cycling(11) and running(47). Total hours of training-including races is 113h(Running: 83h). I'm participating in 6 races-the A-priorities being UltraBirken and Berlin Marathon-both in the end of september.
Todays workout went fine. I experienced some mild discomfort in my right kne-I suspect is a mild degree of "Runners kne". I'm working on that with ice and stretching on a daily basis. I'm also going to use some support on my kne at the beginning of my running. Today I went through three sets. One to warm up and two additional at 60% workload. I can clearly sense that I've lost some muscular strength since last time. I would guess about 20 %. Last strength workout was 26th of May-some seven weeks ago. It's about time to regain some of it.