Vitamin D receptor variability and physical activity are jointly associated with low handgrip strength and osteoporosis in community-dwelling elderly people in Taiwan: the Taichung Community Health Study for Elders (TCHS-E)

[21] Fang Y(2012)Physical activity and dark skin tone: protective factors against low bone mass in Mexican men J Clin Densitom: Off J Int Soc Clin Densitom 15 374-505

[22] Van Meurs JB(2011)Physical activity in middle-aged women and hip fracture risk: the UFO study Osteoporos Int: J Established Result Cooperation Between Eur Found Osteoporos Nat Osteoporos Found USA 22 499-432

[23] Pols HA(2013)Physical activity increases gains in and prevents loss of physical function: results from the lifestyle interventions and independence for elders pilot study J Gerontol A Biol Sci Med Sci 68 426-910

[24] Van Leeuwen JP(2012)Physical activity at age of 20–64 years and mobility and muscle strength in old age: a community-based study J Gerontol A Biol Sci Med Sci 67 905-417

[25] Holick MF(1998)Vitamin D receptor alleles and bone's response to physical activity Calcif Tissue Int 62 413-1565

[26] Ng MY(1996)Determinants of premenopausal bone mineral density: the interplay of genetic and lifestyle factors J Bone Min Res: Off J Am Soc Bone Min Res 11 1557-156

[27] Sham PC(2011)Reduced health-related quality of life in elders with frailty: a cross-sectional study of community-dwelling elders in Taiwan PLoS One 6 e21841-98

[28] Paterson AD(2001)Frailty in older adults: evidence for a phenotype J Gerontol A Biol Sci Med Sci 56 M146-3388

[29] Chan V(1997)Strength of linkage disequilibrium between two vitamin D receptor markers in five ethnic groups: implications for association studies Cancer Epidemiol, Biomark Prev: Publ Am Assoc Cancer Res, Am Soc Prev Oncol 6 93-10

[30] Kung AW(2008)Genetic and environmental determinants of 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D levels in Hispanic and African Americans J Clin Endocrinol Metab 93 3381-1318

[21] Fang Y(2012)Physical activity and dark skin tone: protective factors against low bone mass in Mexican men J Clin Densitom: Off J Int Soc Clin Densitom 15 374-505

[22] Van Meurs JB(2011)Physical activity in middle-aged women and hip fracture risk: the UFO study Osteoporos Int: J Established Result Cooperation Between Eur Found Osteoporos Nat Osteoporos Found USA 22 499-432

[23] Pols HA(2013)Physical activity increases gains in and prevents loss of physical function: results from the lifestyle interventions and independence for elders pilot study J Gerontol A Biol Sci Med Sci 68 426-910

[24] Van Leeuwen JP(2012)Physical activity at age of 20–64 years and mobility and muscle strength in old age: a community-based study J Gerontol A Biol Sci Med Sci 67 905-417

[25] Holick MF(1998)Vitamin D receptor alleles and bone's response to physical activity Calcif Tissue Int 62 413-1565

[26] Ng MY(1996)Determinants of premenopausal bone mineral density: the interplay of genetic and lifestyle factors J Bone Min Res: Off J Am Soc Bone Min Res 11 1557-156

[27] Sham PC(2011)Reduced health-related quality of life in elders with frailty: a cross-sectional study of community-dwelling elders in Taiwan PLoS One 6 e21841-98

[28] Paterson AD(2001)Frailty in older adults: evidence for a phenotype J Gerontol A Biol Sci Med Sci 56 M146-3388

[29] Chan V(1997)Strength of linkage disequilibrium between two vitamin D receptor markers in five ethnic groups: implications for association studies Cancer Epidemiol, Biomark Prev: Publ Am Assoc Cancer Res, Am Soc Prev Oncol 6 93-10

[30] Kung AW(2008)Genetic and environmental determinants of 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D levels in Hispanic and African Americans J Clin Endocrinol Metab 93 3381-1318