Final answer:
The recommended duration for improving physical work performance is 2.5 hours of moderate-intensity or 1.25 hours of vigorous-intensity aerobic physical activity weekly, as per the HHS guidelines. This equates to approximately 30 minutes to an hour of exercise per day in a moderate exercise program.
Step-by-step explanation:
While the exact duration of training required to improve physical work performance can vary based on individual fitness levels and goals, the U.S. Department of Health and Human Services (HHS) provides general guidelines. Adults aged 18 to 64 should engage in aerobic physical activity for 2.5 hours at moderate intensity or 1.25 hours at vigorous intensity each week.
These recommendations suggest that daily workouts could average around 30 minutes to an hour per day, in alignment with a moderate exercise program. Moreover, these activities, when performed regularly, have been associated with extensive health benefits such as maintaining a healthy weight, improving muscle strength, and enhancing psychological well-being.