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As a birthday gift from me to me, I opted for Canyon Ranch, in Lenox MA, a top of the line, all inclusive. health/ spa resort .It looked gorgeous and interesting on the website (Canyonranch.com) but still, I expected to see a lot of folks going from massage to manicure to Spartan meals.
Wrong! Wrong! Wrong!
Many guests were in very good shape, used to exercise regimes at. home and spent much of the day going from aerobics, to pilates, to yoga Mean age was about 45-50, though there were people of all ages. , During the week, guests were mostly women. On weekends the men showed up.. About 30% were couples.
Everything at Canyon Ranch is luxe, the accomodations, facilites, gracious, exellent staff.The focus is on health and fitness, A medical staff is on site, practicing alternate and conventional medicne.
There is non stop hiking, biking, swimming , fitness classes, meditation, manicures, facials and treatments that I can't pronounce. . Lectures dealt with wellness of mind, body, spirit. Weight loss and stress reduction were components of staying healthy, but not the primary focus. ... The food is wonderful; with calories, fat, and fiber listed next to everything on the menu.
The first few days, I kept on a busy schedule, racing from class to class, from treatment to treatment, but , if finally sunk in about calming down, and I cut back on the jumping, stretching, jogging, pilates and settled into the lounge, curled up by the fireplace reading a best seller or chattinig with other guests,
Good vacation? No it was a great vacation The one problem? Canyon Ranch is not in the IHG family. Just think of the points I could have racked up. on Priority Club.

Does Jane Fonda still own/run that place?
Sounds like you had a good time there~maybe my wife will want to go there next year. She has some family in MA.