1859
CONCLUSION : Our study shows that ( 1 ) total body BMD and femoral neck BMD were significantly higher in the study group that performed weight - bearing exercises than in control subjects , ( 2 ) swimming exercise had no effect on BMD , and ( 3 ) although swimming is not a bone - building exercise , it can significantly improve shoulder , back , and grip muscle strength .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None