- When my kids were younger, I was always nearby during a workout.

- I can comfortably work out regardless of the season, weather, or time of day.

- I can easily take a bathroom break mid-workout.

- I can do much longer workouts without getting bored, because I can watch movies or play video games during the workout. (E.g., using an exercise bike + my own computer.) This works around motivational / persistence issues I used to have.

- I can end a workout on short notice. Contrast to a long-distance run or bikeride, where I may be far from home when something comes up.