I've been wanting to take some sort of fitness/health&mind class for awhile...but I'm unsure of which one. I want something that can help relieve stress and tone some areas of my body as well. I'm not really sure about Yoga, since I've always perceived it as something a little more mellow/relaxing, so I'm actually only torn between pilates and kick boxing. I was thinking kick boxing may help me take out some of my anger/stress, lol. I'm 5'7" and 125 lbs but would like to build some muscle/lose some flab in my tummy/underarm/thigh areas. Recommendations/suggestions/thoughts?