Figure 2. Body weight.

Line graph shows median body weight in grams with the first and third quartile shaded. Body weight did not differ between aged groups at the start of the experiment, but aged mice in the short-term exercise (Aged ST Ex) and long-term exercise (Aged LT Ex) groups weighed less than the aged control (Aged CON) mice beginning one week after wheel access. Young (Young CON) mice weighed less than all aged mice throughout the experiment. Symbols indicate a significant difference between aged control and aged exercise groups (^) and young controls and all aged mice (*).