Describir: Gender differences in exerted forces and physiological load during pushing and pulling of wheeled cages by postal workers

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