Never been sore there before....

I am almost done with week two of working out and I feel great.  Plus I tried a few new exercises the last two days and wow am I sore.  I've never been sore on my sides before...you know the love handle/muffin top area of a female.  I only did one rep on each side with a 12 lb medicine ball for two days straight..did not expect to be this sore.  Don't get me wrong, it's a good sore because I've never been sore there before, but now I am curious to see what else I can do with this ball.  As I learn new exercises and try them out I will let you know how it goes.  Off to the gym I go!