October 1, 2009: An underwater analysis of Kirsty Coventry's right-arm stroke at 115 m of her world record gold medal 200 m backstroke race at the 2009 Rome World Championships was added to the "How Champions Do It" section.

October 3, 2009: An underwater analysis of Rebecca Soni at 160 m of her world record gold medal 200 m breaststroke race at the 2008 Beijing Olympic Games was added to the "How Champions Do It" section.

October 5, 2009: An underwater analysis of Britta Steffen at 15 m of her world record 4 x 100 m relay leg at the 2009 Rome World Championships was added to the "How Champions Do It" section.

October 7, 2009: An underwater analysis of Federica Pellegrini at 190 m of her world record gold medal 400 m freestyle race at the 2009 Rome World Championships was added to the "How Champions Do It" section.

October 9, 2009: An underwater analysis of Sarah Sjostrom at 20 m of her world record gold medal 100 m butterfly race at the 2009 Rome World Championships was added to the "How Champions Do It" section.

October 15, 2009: An underwater analysis of Oussama Mellouli at 1,415 m of his gold medal 1,500 m race at the 2009 Rome World Championships was added to the "How Champions Do It" section.

October 17, 2009: Research abstracts were added to the biomechanics, hydrodynamics, physiology, psychology, and training sections of Swimming Science Abstracts.

November 30, 2009: Two research articles were added to the The Problem with Chlorinated Pools section.

December 19, 2009: Research abstracts were added to the Biomechanics, Training, and Physiology Abstracts sections.

December 21, 2009: A sanitization strategy for chlorinated pools proposed by Richard Falk was added to the The Problem with Chlorinated Pools section.