On average though, a male gorilla will only weigh around 310 to 440 lbs (more or less), and females average only about 220 lbs. Males never exceed 6 feet in height, only average around 5 ft 3 in to 5 ft 9 in. Females may grow to only 4 ft 7 in tall.
Wearing a weighted vest while running certainly has many advantages and can help improve the strength, endurance and the fitness of a runner. If you would like to try running with a weighted vest to see if it benefits speak to your trainer/coach and look into the best vest for you.
Most people don't do them at the gym because most people can't even do pullups. A weight vest is quite expensive though, get a belt and just add plates to get the weight up. To harp on this point: only 10% can do a pull-up and only 1% can do 10 or more. The people doing weighted pull-ups are the 1%, quite literally.