21.   To train I upped my aerobic activity.

22.   Try thinking of walking from the far end of the lot as aerobic activity, or just a necessity of life.

23.   Which aerobic activity burns the most calories?

24.   Other studies have shown that aerobic activity improves the ability of patients to perform activities of daily life, and trains them to go farther without feeling pain.

25.   Aerobic activities work on the slow-twitch fibers, which contract more slowly, but are more valuable for endurance.

26.   The study is the first to link aerobic activity to reduced prostate cancer risk.

27.   Women who started with her in the fall looked at it primarily as an aerobic activity, she said.