Sorness is not an indication that ure gonna gain muscle mass.It's clearly not an indication whether you shud be working out hard. When you're going to gym regularly..soreness goes away..and it doesnt matter how hard you push yourself, you wont be sore in those muscles cuz ure body has adapted the routine. So, stop worrying too much about soreness, its no big deal.
And as far as ur question about high reps with low weights increase definition then its wrong. If you want to get toned and defined body, u need to concentrate more on your diet. There have been a lot of studies shown that high reps low weight does not make ur body toned. Remember, working out is just 50% for having a good physique..the other 50% comes from diet and adequete rest.
cheers.
Do you have any refrences that I can read about the muscle soreness. I have been strength training for abt 6 months. I thought I read that the muscle soreness is because that the muscles are rebuilding themselves.
And abt the diet...that is the hardest part for me:(..I simply cannot diet