I think you should hold a stretch for 10-30 seconds
 
        
                    
             
        
        
        
zero.
from newton's first law of motion
 
        
                    
             
        
        
        
The gravitational force would get stronger because the farther the two masses are separated the more gravitational force will be used to pull them together the closer they are the less gravitational pull is used to pull them together