" Running competitions have probably existed for most of humanity's history, and were a key part of the ancient Greek Olympics, as well as the modern Olympic games. Events are usually grouped into several classes, each requiring substantially different athletic strengths and involving different tactics, training methods, and types of competitors . Running affects not only the body, but the mind as well. Runners who finish a great run are often said to have a "runner's high" - a strong feeling of accomplishment and pride. Some sources point to the origin of a runner's high being increased endorphin production as a result of exercise. Running injuries There are many injuries associated with running (due to it being a high impact activity). Common injuries are "runner's knee" (pain in the knee), shin splints, pulled muscles (especially the hamstring), "jogger's nipple" (soreness of the nipple due to friction), twisted ankles, and Iliotibial Band Syndrome. Faster Running Tip The most common running related injuries are due to over-use. Repetitive stress on the same tissues without enough time for recovery or due to improper form or muscle imbalances, leads to many of the above. "

" However, Lowell does have a better relationship with humanlike drones who are also aboard the ships. The science and technology depicted in Silent Running are not always plausible, and Trumbull's special effects are low quality even by the standards of the time (he had a larger budget in his later film Blade Runner), but the melancholy message is powerful. The soundtrack songs are performed by Joan Baez and the film score was composed by Peter Schickele. Spoiler warning: Plot or ending details follow. When orders come from Earth to jettison the domes that contain the plants, blow each of them up via nuclear explosions and return, Freeman Lowell decides it is his mission to save the plants on his ship, the "Valley Forge. " Each ship carries six domes. When one of his crewmates comes to set a bomb in Lowell's forest, Lowell strangles him with the handle of his shovel. Breathing Running Tip In the struggle Lowell's right leg is injured. He then traps the other two crewmates in one of the domes that is about to be jettisoned, and they are killed when Lowell releases the dome and blows it up. "