nsst america are not getting the exercise they need. kids should get an hour or more every d. adults should aim for about 2.5 hours of exercise eachweek. even short bursts of activities like house work or climbing stairs are beneficial. >> housework and climbing stairs counts i'm good. >> no excise? >> 2.5 hours. >> we'll have to have you jogging around the studio. >> now to a group of nurses that makes history. the class of 1968 health it's 50th reunion. >> they had the first black student no graduate from the program. we caught up with these women celebrating years of friendship. >> if you ever wondered what 50 years of friendship sound like this is it. and joe an is also still a nurse. >> it's amazing. none of us can believe it. >> we share memories, some of which we cannot share with you. >> what we can share is the history they made. >> i was grateful for that. >> she was the first black student to graduate fromm. her prog >> but the nurses school was still quite segregated. >> we didn't give it a second thought. >> we know how to persist. >> and no matter what, all of th