Describir: The effect of handle height and cart load on the initial hand forces in cart pushing and pulling /

 __   __    _____    _    _     ______    ______   __   __   _    _   
 \ \\/ //  |  ___|| | \  / ||  /_   _//  /_____//  \ \\/ // | |  | || 
  \   //   | ||__   |  \/  ||   -| ||-   `____ `    \ ` //  | |/\| || 
  / . \\   | ||__   | .  . ||   _| ||_   /___//      | ||   |  /\  || 
 /_//\_\\  |_____|| |_|\/|_||  /_____//  `__ `       |_||   |_// \_|| 
 `-`  --`  `-----`  `-`  `-`   `-----`   /_//        `-`'   `-`   `-` 
                                         `-`                          
   ___    
  / _ \\  
 | / \ || 
 | \_/ || 
  \___//  
  `---`