Carson RL, Castelli DM, Pulling Kuhn AC, Moore JB, Beets MW, Beighle A, Aija R, Calvert HG, Glowacki EM. Impact of trained champions of comprehensive school physical activity programs on school physical activity offerings, youth physical activity and sedentary behaviors. Prev Med. 2014 Dec; 69 Suppl 1:S12-9.