Which of the following workplace activities would best be considered 'exercise' rather than incidental physical activity, assuming the same energy expenditure?

• A. Standing at a desk for several hours while intermittently shifting weight and performing short reaches as part of work tasks, with no planned progression.
• B. Frequent short elevator-free stair climbs to meetings that are done opportunistically and without a structured plan, though they may be repeated daily.
• C. A company-organized 30-minute lunchtime brisk walk group that follows a progressive plan and aims to improve employees’ cardiorespiratory fitness.
• D. Walking across a large warehouse to deliver packages as part of the job requirements, performed sporadically without progression or a fitness goal.

Answer: (C)