***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: This study compared the effects of a resistance training protocol and a moderate-impact aerobic training protocol on bone mineral density ( BMD ) , physical ability , serum osteoprotegerin ( OPG ) , and receptor activator of nuclear factor kappa B lig and ( RANKL ) levels .  Seventy-one older women were r and omly assigned to resistance exercise ( RE ) , aerobic exercise ( AE ) or a control group ( CON ) . Both interventions were conducted 3 times per week for 8 months . Outcome measures included proximal femur BMD , muscle strength , balance , body composition , serum OPG , and RANKL levels . Potential confounding variables included dietary intake , accelerometer-based physical activity ( PA ) , and molecularly defined lactase nonpersistence . After 8 months , only RE group exhibited increases in BMD at the trochanter ( 2.9 % ) and total hip ( 1.5 % ) , and improved body composition . Both RE and AE groups improved balance . No significant changes were observed in OPG and RANKL levels , and OPG/RANKL ratio . Lactase nonpersistence was not associated with BMD changes . No group differences were observed in baseline values or change in dietary intakes and daily PA . Data suggest that 8 months of RE may be more effective than AE for inducing favourable changes in BMD and muscle strength , whilst both interventions demonstrate to protect against the functional balance control that is strongly related to fall risk In this r and omized controlled trial , we examined the effects of a 3-month therapeutic lifestyle modification ( TLM ) intervention on knowledge , self-efficacy , and health behaviors related to bone health in postmenopausal women in rural Korea . Forty-one women ages 45 or older were r and omly assigned to either the intervention ( n = 21 ) or control ( n = 20 ) group . The intervention group completed a 12-week , 24-session TLM program of individualized health monitoring , group health education , exercise , and calcium-vitamin D supplementation . Compared with the control group , the intervention group showed significant increases in knowledge and self-efficacy and improvement in diet and exercise after 12 weeks , providing evidence that a comprehensive TLM program can be effective in improving health behaviors to maintain bone health in women at high risk of osteoporosis 
    Output:
    
RESULTS Exercise training increased BMD of LS , FN , WT , and Tro .
According to the type of exercise training , combined exercise training ( aerobic + resistance ) showed improvements in BMD of LS , FN , WT , and Tro .
However , aerobic exercise training alone and resistance exercise training alone showed inconsistent results .
CONCLUSION Exercise training can improve the BMD of LS , FN , WT , and Tro in Korean postmenopausal women .
The type of exercise training may be a crucial factor for maintaining or improving bone health of this population