Hello I also had also strain in rectus femoris 1,5 year ago. It got strained 3 times in a row in 6 weeks because i didnt wait... I have trained it but not constantly.. now if i train it hard i cant feel it and all pressure go to hip and i get pain there... the hardest motion for me is when i lift my leg then it feels very hard and unbalance and also i get pain in hip cuz the muscle is weak.... Please write to me and help me what to do what to start exercies firslty...and if i should exercie everyday... God bless pls help