Final answer:
The least important factor of a personal fitness program is the time of day physical activity will be performed.
Step-by-step explanation:
The least important factor of a personal fitness program is the time of day physical activity will be performed. While the time of day may affect personal preference and convenience, it does not have a significant impact on the overall effectiveness and benefits of a fitness program. Factors such as the individual's personal conditions, the availability of resources, and the level of motivation play a much more crucial role in designing a successful fitness program.
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