X0306 4 2013-03-01 0 0001076195 LIFE TIME FITNESS, INC. LTM 0001390963 ZWIEFEL JEFFREY G 2902 CORPORATE PLACE CHANHASSEN MN 55317 0 1 0 0 Executive Vice President Common Stock 2013-03-01 4 S 0 16650 41.9035 D 172261.016 D Common Stock 2013-03-04 4 S 0 7204 41.5517 D 165057.016 D Reflects the weighted average price of 16,650 shares of Common Stock of Life Time Fitness, Inc. sold by the reporting person in multiple transactions on March 1, 2013 with sale prices ranging from $41.495 to $42.3017 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. Reflects the weighted average price of 7,204 shares of Common Stock of Life Time Fitness, Inc. sold by the reporting person in multiple transactions on March 4, 2013 with sale prices ranging from $41.31 to $41.94 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. /s/ Brian S. Senger on behalf of Jeffrey G. Zwiefel 2013-03-05