Constant tiredness of thighs

does anyone know why my guy friend may always be feeling like his thighs are constantly tired? he says its an effort to walk up stairs, like his thighs dont want to move. he is athletic. thx

He should see a doctor. This may be a sign of something serious - especially if you say he is athletic.

Nothing serious, this is because he stretches his legs too much and the tendons hurt a little because of this

He's probably just straining his body to hard and gets tired our, but thats just my opinion and I'm no doctor. It's probably nothing, but I definately reccomend being on the safe side and telling him to see his doctor.

ok dude i play football and it happens to me you know what you need to streach out before you do your sports and after if you want you should also streach then if they hurt you should get icyhot patch they really help.