This exercise is especially popular with puppy owners. Remember, this is a timed exercise. This is feasible only for those with strong bones and small dogs. Run after dog - pick any reason, there are plenty. Dogs of any size can be used for this exercise.
Greyhounds are inadvisable.
This is a lifelong fitness program. I was flying from San Francisco to Los Angeles. By the time we took off, there had been a 45-minute delay and everybody on board was ticked. Unexpectedly, we stopped in Sacramento on the way. The flight attendant explained that there would be another 45-minute delay, and if we wanted to get off the aircraft, we would reboard in 30 minutes.