well 2 weeeks before i got the pain i was working on a building site and doing a lot of heavy lifting .but it wasnt until 4 days after i stopd doing the lifting that it came on. i went out on the friday nite on the beer got up the next morning and startd from there. i dint injure my self or fall over it came on randomly..i my self have a theroy the past 11 months i have gatherd as much information about my pains as possible. i beleave that in certain people you can sort of sometimes do too much work on your muscles,and instead of them snaping or tearing they sort of weaken very slowly until they are that weak everytime you go to lift something that is light its like your lifting something that is heavy. i have done a lot of heavy lifting for 5 years so that would sort of fit in.also do you ever feel the need to go to the toilet either for a no 1 or 2. this is because of your muscles contracting.i beleave the only way forward is prolotherapy... and testostrome. now i no this is clasd as an illegal steroid but if used in the correct doseage it not only heals muscles and basically any thing else that is weak it strengthens them.. so the next time you do