Here is a functional fitness tool that helps you perform pushes and pulls to build strength in your body. The MoveStrong Elite Outdoor Drive Sled gives you a total body functional workout to build power and muscular endurance. It is suitable to use on grass or turf. You can also use it on carpet.
This sled measures 24″L x 61″W x 42″H. It weighs 100 lbs. MoveStrong has more info on this piece of equipment.