MINNEAPOLIS — When Anne Hendrickson was driving around the Twin Cities as a freelance consultant, she found herself wishing for a space where she could easily combine work with physical activity. The ambition inspired Work It LLC, a business Hendrickson opened last month in St. Paul. It’s a co-working space that rents desks to freelancers, with the twist that clients can walk on treadmills or pedal a stationary bike while they work.