Katherine Shortlidge celebrated her 70th birthday with a vigorous, 45-minute bootcamp workout, the same one she does four days a week. She also swims, bikes, runs triathlons. And twice a week she does what she loves most: practicing with the Calendar Girls Dance Team. The Calendar Girls are full of women from age 50 up into the 80s, all embracing the opportunity of aging , staying physically active and using their passion for dance to give back to the community.