Daylight Savings Time does not affect people's total daily step counts, but does affect when they walk

Every spring and fall, a furious debate ignites across the country: Should we do away with Daylight Savings Time? Beyond anecdotes of preferences among various professions and household situations, the debate raises real questions for policymakers to consider. Does the time shift improve certain types of productivity? Does it save on power usage? Does it make people more or less physically active?