If an employer does not offer a retirement plan, what might be another way to save for retirement?

That depends, if your physically active it'd take a shorter amount of time or if your less physically active. You might have to do this one and time it, once you finish the workout you can use your time as and average. Ex: I take 15 minutes on the mile run, my average time is 15-16 minutes. But I recommend at least doing all or half of the workout.

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