I don't know why your legs hurt all week, my suggestion would be to cut your leg day and spread them withhin another workout twice a week so your not overloading. Or you can sacrifice intensity or repetitions or both. There is no magic cure, no glutamine no running, no stretching these theories have been tested and been proven to not have an effect on DOMS (delayed onset muscle soreness), on the contrary i feel it is very important to jog because it promotes good ciculation and overtime your body will adapt and circulate nutrients to affected areas quicker than when untrained, which will ultimately aid in the healing process. Try getting in a hot tub after your workout as a cool down. You can stretch all you want after a workout but the next day your still gonna be sore as shit, but just cause stretching doesn't aid in the healing process doesn't mean you should ignore it. Legs are accountable for a lot of muscle mass and just like any other muscle if you do chest every monday with the same exercises ur not going to see the same results. Work your legs out less, more often; try this out it should help some