Swimming and jogging are both good for burning calories. Swimming needs about 300-700 calories per hour, while jogging needs about 500-600 calories per hour. So, if you are on diet, swimming is a (1)      choice. Both sports are good for bones and muscles. When swimming people have to move all parts of their body, jogging on the other hand focuses only in calf and the back part of the thigh. That's why swimming is (2)      than jogging in forming strong muscles and bones. However, swimming needs a special place, a swimming pool. On the other hand, people can go jogging wherever and anytime. That's why jogging is (3)      than swimming.

The most appropriate word to fill in the blank number (2) is ...