| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Almost never | 1165 | 
                                                                 
                                    
                                    37.8%
                                 
                                                             | 
                                                        
                    
| 2 | 2. Once a month | 501 | 
                                                                 
                                    
                                    16.2%
                                 
                                                             | 
                                                        
                    
| 3 | 3. 2-3 times a month | 369 | 
                                                                 
                                    
                                    12%
                                 
                                                             | 
                                                        
                    
| 4 | 4. Once a week | 431 | 
                                                                 
                                    
                                    14%
                                 
                                                             | 
                                                        
                    
| 5 | 5. At least once a day | 568 | 
                                                                 
                                    
                                    18.4%
                                 
                                                             | 
                                                        
                    
| 6 | 6. Special needs,cannot do exercise:sick | 32 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    
| 7 | 7. Refused answer | 9 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 9 | 9.Missing | 10 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             |