"Gorilla book that I have at home says that they are 4-8 times stronger than the average man. The Animal face off show said that scientist estimate that the strength of a 400 pound Silverback Gorilla is 20 times our own ..... Nigel Marvin...... stated that they where 5 times stronger than a human"-LudoRephaim.
The question is which human in particular are they talking about? There are plenty of untrained women out there that cannot bench press a 45 lb Olympic bar (with no plates attached). At the other end of the spectrum there are men out there (albeit rare) that can bench 450 lb. So that's a ten-fold difference among humans. At the extreme end of the spectrum we have men benching 600-700 lb (without a bench suit. Bench suits push it up to 1000 lb). I gained almost a four-fold strength increase myself with training, going from a bench of less than 100 to 385 over several years. In other words adult men vary amongst themselves by a factor or 4 or 5 and more in strength.
So if gorillas are 10 fold stronger than the strongest men, then they are 100 stronger than your average human, on the other hand if there are only 10 times strongest than your average human then they're on par with your most elite males.
The variability in the gorilla to human strength ratio in the stated books is due to the rather imprecise nature of the description "stronger than a human".
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