Accept and implement what ScottWhigham and epc have posted. Don't try to control something that you can't: he's over 60, has lived a long life and may not see m

Accept and implement what ScottWhigham and epc have posted. Don't try to control something that you can't: he's over 60, has lived a long life and may not see much reason to continue. Meanwhile, if he wants to try, I recommend "playing to his strengths". Likely some of the largest muscles in his body are in his legs (obese persons often have incredibly strong legs that can burn lots of fat) and if he simply begins walking then it's the best first step to a cure. Offer incentives if necessary: take him to parks, malls, museums or wherever he might enjoy a change of scenery while walking. Someplace with lots of young women usually perks up the older guys. Of course if he went to a gym that would be great, but I wouldn't buy a gym membership yet.