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.
Your arms are important for balance as you run. Moving the arms in rhythm with your legs can also control your speed. Keeping your arms bent at a 90-degree angle keeps your biceps contracted, working them throughout your run. The forward and backward motion of the arms helps work your triceps and shoulder muscles.