For 6-7 years I was running 40-50 miles a week with a running group and focusing on all the types of running workouts a runner "should" do but I couldn't break the 4 hour mark. (I had two finishes under 4:10 though). It wasn't until I started dead lifting and squatting 2-3x a week and cutting back to 30-35 miles per week that I was able to drop down to 3:58. Obviously there are multiple factors, but I was definitely surprised by my performance that day. Anyone else have a similar experience?