Be Military Fit, or BMF, is a private company which runs outdoor group fitness classes in 140 public parks and outdoor spaces across the United Kingdom. The classes are predominantly led by former or serving members of the British Armed Forces. BMF was founded in 1999 as British Military Fitness and pioneered the concept of group classes for outdoor fitness in the United Kingdom. In September 2018 it was purchased by NM Capital and Bear Grylls Ventures and re-branded as Be Military Fit.