A former grocery store is getting new life as a heath and fitness center. Onelife Fitness signed a 10-year lease for the storefront at 17821 Georgia Ave. in Olney. The 41,277-square-foot space was left vacant following Giant Foods' move to a new location less than a mile away. Jim Crilley, the agent at H&R Retail who brokered the lease, said he reached out to Onelife when Giant announced its intention to take over the former Shoppers store in Olney Village Center. Prior to moving, Giant provided…