I'm new here, so hello all! I'm a 37 yr old female and I started weight training/working out with a trainer about 6 months ago. I LOVE IT and have seen much improvement. I'm 5'4" and 122 lbs. I started out at 137 lbs. My body fat was 24.2% and it's down to 17.3%. So, I've had tons of success. My question is about 2 months ago my legs started to ache. Not hurt, like after you weight train and your muscles are sore, this is like a constant ache in my legs (like how a toothache would feel). I train with a trainer for one month, 3 x's a week for 4 weeks, building muscle. Then, he puts me on my own for about 6 weeks and I do cardio/workout exercises. I work very hard and push myself. I told him how I'm feeling and he said that maybe I need to take a week off for my muscles to recover. I worked out yesterday and before my workout my legs were just starting to feel ok from Friday's workout. After Monday's workout they are now killing me. I dedicated myself to rest all this week. I don't know how I'll do it because I love to workout, but I can't take the pain anymore!Have any of you ever had this problem? What is happening to me?