Some companies now charge lower insurance premiums to workers who meet benchmarks for healthy living. The Senate's health care overhaul legislation would expand the trend. But instead of cheering the proposal, some patient-advocacy and health groups are worried that it would mean higher rates for less-fit Americans, possibly pricing them out of their employers' insurance plans. 'It is a way of cherry picking,' said Dick Woodruff, senior director of federal affairs for the American Cancer Society. 'We are all for workplace wellness, but when you tie it to the insurance pricing system, it's a real problem.' Critics of the Senate proposal also say that giving special treatment to those who meet a company's fitness standards could undercut one of the marquee promises of the Democrats' proposed overhaul: preventing employers and insurers from discriminating against people on the basis of their health status and pre-existing medical conditions. Under current law, companies can discount insurance premiums by 20 percent if employees meet benchmarks for weight, smoking or other aspects of their health. Earlier this year, two Senate committees, as part of the health care overhaul, voted to allow such cuts to go as high as 50 percent. Leading the charge for the idea is Safeway, the giant grocery store chain, which already has adopted an incentive program that includes health premium reductions. Last year, the company began to offer a 20 percent premium discount to its nonunion workers who quit smoking, went on a diet, brought down their blood pressure and cut their cholesterol. Jo Chiti, a Safeway employee who has lost about 30 pounds over the last year, said she has been swayed by Safeway Chief Executive Steve Burd's argument that health insurance should be more like car insurance. Just as good drivers should be rewarded with lower premiums than reckless drivers, Burd says, people who take responsibility for maintaining a healthy lifestyle should pay less for coverage than people who do not. A lobbying blitz by Burd, who has traveled to Washington 11 times this year, was instrumental in the two Senate committees' decision to include the idea in their health care bills. Senate leaders are putting together the final version of a bill they will take to the Senate floor. 'We believe that personal responsibility and financial incentives are the path to a healthier America,' Burd said in a newspaper column. (Begin optional trim) Nationwide, the program covers 25,000 nonunion employees who are part of the Safeway health insurance plan, most of them in California. The company says that 74 percent of them have signed up. Once a year, participants submit to tests of four health risk factors: smoking, obesity, blood pressure and cholesterol. If they pass all four, they receive a $780 annual discount, which is 20 percent of the total cost of their insurance. If they do not pass initially but make progress -- quitting smoking or losing 10 percent of their weight -- they can get a premium rebate. After making several changes in the health policy offered to nonunion workers, Burd said, the company's health care costs have 'flatlined' over the last four years, while other companies' costs have gone up nearly 40 percent on average. But it is not clear how much credit goes to the premium discounts. Those have been available only for one year, and presumably it is too soon for lifestyle changes to effect health expenses. There is no independent analysis of the program and whether it really changes behavior -- or, as critics suggest, rewards people who would be healthy anyway. (End optional trim) Critics in the labor movement say the incentive scheme is a backdoor way for companies to cut their costs by driving less-healthy workers out of the insurance group. Indeed, most of Safeway's union workers, who are represented by the United Food and Commercial Workers and make up some 95 percent of the company's work force, have not embraced the idea in their own health plan, which is established in a multi-employer contract. What is more, critics worry that the program will unfairly penalize people whose health status is not solely the result of behavior they can easily control, such as a genetic predisposition to obesity or the weight gain that often accompanies smoking cessation. Ken Schachmut, a Safeway senior vice president, says the company has a system for making exceptions if people bring a physician's note to explain why they cannot safely or wisely achieve the set goals. 'We do not discriminate,' he said. Opponents hope to water down the Senate provision in the legislative maneuvering ahead. A coalition of patient-advocacy and health groups said in a letter to Congress: 'We believe that provisions increasing premium variations allowed under current law can -- if used unwisely -- be a back door to making coverage to the sick unaffordable.' 