Between 01 June 2014 and 31 May 2015:

• 588 UK Regular Royal Navy (RN) personnel (in service as at 01 June 2015) failed at least one fitness test. This constituted 3% of personnel in service as at 01 June 2015 that took at least one fitness test during the period.
• 4,339 UK Regular Army personnel (in service as at 01 June 2015) failed a component of the Military Annual Training Test (MATT2); either the Annual Fitness Test (AFT) or Personal Fitness Assessment (PFA). This constituted 7.5% of personnel in service as at 01 June 2015 that took at least one fitness test during the period.
• 1,633 UK Regular Royal Air Force (RAF) personnel (in service as at 01 June 2015) failed at least one fitness test. This constituted 6% of personnel in service as at 01 June 2015 that took at least one fitness test during the period.

Notes:

• The Defence Health and Well-being Strategy was launched in 2015.
• Data was obtained from the Joint Personnel Administration (JPA) system and the Fitness Information Software System (FISS).
• MATT 2 Policy was introduced in August 2008.
• The RAF introduced a Fitness and Health strategy in 1993.

You can find information on the fitness policies of each Service here.

Reference

FOI 2015/06119 dated 18 September 2015.