" 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. 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. Generally these can be minimized by warming up beforehand, wearing proper running shoes, improving running form, performing strengthening exercises, and getting enough rest. Chicago Club Running There is a very strong consensus among the running and scientific community that all of those can be very effective in minimizing or recovering from running injuries. Another injury prevention method that is very commonly recommended in the running community, but is actually controversial is stretching. "

" In some states, the gubernatorial candidate chooses his/her running mate while in other states parties hold separate ballots for governor and lieutenant governor. The two then run together as running mates in the general election. In some states, separate elections are held for governor and lieutenant governor. In this case, the governor and lieutenant governor run separate campaigns and can be from two different political parties. This was the case when George W. Bush was Governor of Texas. His first lieutenant governor, Bob Bullock, was a Democrat. Bryn Club Mawr Running In cases like this, the governor and lieutenant governor are not considered running mates because they are not elected on the same ticket. Running mates are often chosen to balance the ticket. "