Your requirement for a suspension trainer will be eliminated once you are able to perform decline pushups while swinging.Make sure that your hands are on the ground and that your feet are on top of the seat of the swing. Assume a push-up position with your hands on the ground and begin the exercise. While bending your elbows, lower your body to the ground and then push yourself back up to the starting position.At all times, be sure that your back is straight and that your core is tight.