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Before starting a resistance training program, you need to know which tools to use. By knowing the weight of different types of barbells you can easily factor this resistance into your training regimen. The standard weightlifting bar is the Olympic barbell, a free weight held with both hands. A standard Olympic barbell is between 4 and 7 feet long and weighs 45 pounds. Olympic barbells are heavy-duty pieces of equipment that can hold weights of more than 1,000 pounds. Smaller versions of the traditional Olympic barbell are between 4 and 6 feet long and weight approximately 10 to 20 pounds.
Posts: 2,158. Rep Power: 369. The counter balance loses its effect when heavy weight is used. At the machine at my gym, if you drop the empty bar, it will slowly drop to the springs because of the counter balance. Put 400lbs on the bar and drop it and it will fall just like a free weight bar. Smith machine bars (the 7ft olympic ones) are the same as a free weight bar (unless you are using 100lbs or less on a counter balanced machine), they feel lighter because the weight is balanced. Having said that, there are a couple of guys at my gym who bench 405lbs on a free weight bar but can't do it in the smith machine. If the bar didn't weigh nothing, they would be able to do it easy, even if they aren't used to the straight up and down motion.