I have been doing exclusively the program for 40 weeks now. In the last few weeks I decided to go for a run on two occasions and in both occasions, I had to stop after 5km because I had intense pain at my knee. This is something that I had never felt before and I was an ok runner before focusing exclusively on GB. I could do 5-10k on the road with no leg issues/pains.
A little bit about me. I am about 37 years old and I have been active my whole life. In the last 4 years I had focus a lot on heavy gym lifting and combined it with some outdoor runs here and there. Then I stopped all that because I was losing my flexibility and I focused exclusively on GB.
I had a look online and they say that the causes of the runner's knee might be shoes, lack of stretching or lack of leg strength. I do not think that it is my shoes, because they are almost new and in the past I had run with a similar pair and I had no issues. I do not think that it is lack of stretching, because in the last 40 weeks I am at the most flexible I have ever been. I am worried that it might be lack of lower body strength. At the moment I am at SLS/PE5 and I do not feel my lower body been challenged at all (apart from the calves that get killed at the Front Splits series). My upper body gets hammered with the Upper Body workouts, the Handstand series and Thoracic Bridge series.
I would like to hear your thoughts on that? Is the lower body strength a potential problem for me that I should supplement with other exercises on top of SLS? Of course, I am not asking for a medical opinion on the internet, but I want to hear of your experience working with other runners or other people who might have similar issues.
Thanks,
George