For further stress reduction, stretching, meditation, etc, check out the following local practitioners:
Lisa Tiernan offers meditation: Artful meditations
Inna Broude, yoga and shiatsu: Yoga for Happiness Studio, firstname.lastname@example.org
Diana Kyricos yoga and Thai-Shiatsu Bodywork Atma
Erik Carlson offers several kinds of Energy work including Acutonics sound therapy, IET, Polarity, and Reiki as well as massage therapy, Tai Chi and Qigong classes A Time to Heal
Eric Reardon of Crossroads to Health Nutrition Counseling is a talented and caring nutritionist whom I highly recommend!
I haven't taken classes at these places yet, but here are a couple more local yoga options:
Lowell: Sangha Yoga Collective
Westford: Yoga with Robin
Westford: Tranquiltity Yoga www.bbyoga.com
You can also find yoga classes through Lowell General Hospital, Emerson Hosptial, Chelmsford Recreation Dept.