Final answer:
Running at 5mph or moderate aerobics would realistically offer the highest calorie burn for the woman trying to lose weight, especially if maintained for 20 minutes to an hour. These activities are more intense and burn more calories compared to light bicycling or weight training. The correct options are 2,3.
Step-by-step explanation:
For an overweight inactive woman in her 20s looking to increase her energy expenditure and lose weight, engaging in higher intensity and longer duration activities would generally offer the highest calorie burn. Among the options provided:
- Running at 5mph is considered a moderate to vigorous activity and can burn a significant amount of calories. For a person weighing 100 pounds, running can burn almost 100 calories per mile.
- Moderate aerobics, if done for a continuous duration such as an hour, can also lead to substantial calorie expenditure. It's a full-body workout that elevates the heart rate.
Considering the intensity and potential duration, running at 5mph or moderate aerobics would likely result in a higher calorie burn compared to light bicycling or light weight training, particularly if sustained for periods like 20 minutes to an hour. It's essential that any exercise program is built up gradually to avoid injury and ensure consistency.
According to the Physical Activity Guidelines for Americans, adults should aim for at least 150 minutes of moderate-intensity aerobic activity per week, along with muscle-strengthening activities on 2 or more days per week for additional health benefits.
It is important for the woman to mix aerobic activities with muscle-strengthening exercises to maximize health and weight loss benefits. The correct options are 2,3.