Regular exercise - even walking, gardening or doing housework - can reduce an aging adult's risk of stroke, high blood pressure and heart disease, medical authorities say.

Increasing exercise expenditure to 2,000 calories a week can reduce coronary heart disease risk by 25 percent, says New Health Center here. The center operates a preventive medicine program that tests individuals, evaluates their health risks and offers a self-care regimen for physical well-being.Studies at the center show exercise also lowers blood cholesterol, with a 1 percent decrease in cholesterol reducing heart-attack risk by 2 percent.