Tennis is not treating me really nice lately. Don't misunderstand me, I love it as much as any player here, but I end up my matches with physical pain. Would love to hear from other players how to deal with these issues (I know I am 42 and no longer a youngster) but I want to keep playing 2 or 3 sets in good condition like I did few months ago: *Knee pain: I play on hard courts and lately playing with pain on my knee. My own diagnostic is that I have jumpers knee from overusing it. So I play with a knee brace, but still my knee bother. I have this condition for 3 months. Is there any exercise to strengthen the knees and get rid of the problem? I used to run 10 miles on Saturdays, but can't do it lately because of the pain. *Tennis elbow is coming back: I feel a little bit of pain on my elbow again. Thus, I am also using a brace. I got back to my soft string and low tension. Icing it and theraband. Hope this goes away. Any other advice? *Plantar fasciitis: This has been bothering for years. Come and go. Is there any exercise you guys recommend to get rid of this once and for all? *More stamina: Lately I feel tired during matches -even on the first set-. Last year I used to play 3 sets without issues. Any recommendation to improve my stamina and get more energy? As you can see I refuse to retire. Love the game so your input is crucial. Thanks.