For postmenopausal women with osteopenia (low bone mineral density), practicing tai chi and/or taking green tea polyphenols appears to be safe. Further, practicing tai chi by itself or in combination with green tea polyphenol supplements may improve quality of life; however, taking green tea supplements by themselves has no significant improvement in quality of life. This is according to a recent NCCAM-funded study published in BMC Complementary and Alternative Medicine. Osteopenia may precede osteoporosis, a bone disease characterized by reduced bone strength that can lead to fractures—a significant cause of disability in older people.
NCCAM
Quality of Life and Safety of Tai Chi and Green Tea Extracts in Postmenopausal Women