Running is a method of terrestrial locomotion allowing humans and other animals to move rapidly on foot. Running is a type of gait characterized by an aerial phase in which all feet are above the ground (though there are exceptions). This is in contrast to walking, where one foot is always in contact with the ground, the legs are kept mostly straight and the center of gravity vaults over the stance leg or legs in an inverted pendulum fashion. A feature of a running body from the viewpoint of spring-mass mechanics is that changes in kinetic and potential energy within a stride occur simultaneously, with energy storage accomplished by springy tendons and passive muscle elasticity. The term running can refer to any of a variety of speeds ranging from jogging to sprinting. Running in humans is associated with improved health and life expectancy. It is assumed that the ancestors of humankind developed the ability to run for long distances about 2.6 million years ago, probably in order to hunt animals. Competitive running grew out of religious festivals in various areas. Records of competitive racing date back to the Tailteann Games in Ireland between 632 BCE and 1171 BCE, while the first recorded Olympic Games took place in 776 BCE. Running has been described as the world's most accessible sport.

Pilates is a physical fitness system developed in the early 20th century by Joseph Pilates, after whom it was named. Pilates called his method "Contrology". Pilates developed in the aftermath of the late 19th century physical culture of exercising in order to alleviate ill health. There is however only limited evidence to support the use of Pilates to alleviate things like lower back pain. Evidence from studies show that while Pilates improves balance, it has not been shown to be an effective treatment for any medical condition other than evidence that regular Pilates sessions can help muscle conditioning in healthy adults, when compared to doing no exercise.