Final answer:
To maintain weight loss, most studies and guidelines, including those from the NWCR, suggest engaging in 60-90 minutes of moderate exercise per day, making option B) 60-90 minutes the correct answer.
Step-by-step explanation:
To maintain weight loss achieved through exercise, the 2018 Physical Activity Guidelines for Americans suggest that adults should aim for at least 150 minutes (2 hours and 30 minutes) to 300 minutes (5 hours) per week of moderate-intensity aerobic activity. This recommendation can be broken down to about 30-60 minutes per day, which aligns with the choices provided in the question.
However, for weight loss maintenance, it has been noted by members of the National Weight Control Registry (NWCR) and supported by scientific studies that engaging in approximately 60-90 minutes of moderate exercise per day is commonly reported among those successful in maintaining their weight loss.
Thus, the correct choice is B) 60-90 minutes each day to maintain weight loss. Choices C (90-120 minutes) and D (120-150 minutes) exceed the commonly reported exercise durations for weight loss maintenance, while A (30-60 minutes) may not be sufficient for all individuals.