Carol's pick:
Greendale, Mei-Hua Huang, et al., Yoga decreases kyphosis ("dowager's hump") in senior women and men with adult-onset hyperkyphosis: Results of a randomized controlled trial. Journal of the American Geriatrics Society 57:1569-1579, 2009. Treatment: Hour-long yoga classes 3 days a week for 24 weeks. Conclusion: "The decrease in flexicurve kyphosis angle in the yoga treatment group shows that hyperkyphosis is remediable, a critical first step in the pathway to treating or preventing this condition."

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