Context: That half - hour power - walk , while virtuous , might not be enough to help you maintain weight loss , according to a recent study out of the University of Pittsburgh . The study followed 201 overweight and obese women between 1999 and 2003 . All the subjects maintained a low - calorie diet , but some exercised for 30 minutes five days a week , burning 1000 calories each session . Others exercised for an hour five days a week , burning 2000 calories .

Question: How should one exercise to lose weight ?
Options:
0. They should do a light walking schedule .
1. They should walk .
2. None of the above choices .
3. They should exercise 5 days .
Answer: 3