Shift your weight onto your elbows as you step back with the other foot and place your feet together. Hold until your form starts to fail or until you are no longer able to keep our abs pulled to your back. Step into the ball with one foot at a time. 1  Equipment notes.
For comparison's sake, most modern trucks manage between 5.5 and 6.5 mpg. For most long-haul truck drivers, an increase in fuel economy of 54 percent would equate to a savings of around $25,000 per year at current diesel prices.
My 85 F-250 460 gas with a 3000 lb camper pulling a 6000 lb trailer got 5.5 mpg. Also had a 91 dodge cummins 3/4 ton w/ camper, 16,000 GW 10 mpg and a 1999 F-350 7.3 diesel w/camper 18,000 GW and got 8.5 - 10 mpg. My current RV is a 38ft Monoco Diplomat with a 315 cummins weighting 33,000 lbs pulling a 6000 lb trailer gets between 6.6 mpg to 8.4 mpg.