Sometimes when I go to the gym I see guys doing bench press while having chains draped over the bar. What exactly does having the chains there accomplish other than creating a lot of noise? Do the chains provide extra resistance and if so how is the extra resistance provided by the chains better than that which could be provided by an increase in the amount of weight they are using?
Best answer:
If your talking about chains Hooked up to the bench press pole then that helps it stay in place The pole wont stay any where but straight when you go to lift while lying down it helps you but same weight no diffrence
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Sensors: Carrying The Weight Of The World
Article by MeasurementSpecialties
Introduction
How useful is technology? Do we need to spend money on research and production of new products and services? How is technology serving humanity? A skeptic may comprise these questions as the width of televisions is decreasing and the prices are increasing, but the scope of technology reaches further than home entertainment. Technology is saving lives.
Sensor technology has been around for some time, but we are recently finding how diverse and incredible it can be.
Tragedy of engineering
On August 1, America experienced the tragedy of the I-35 bridge over the Mississippi River collapse. This event is not entirely out of the ordinary. Bridges are susceptible to fatigue and collapse over a length of time. Bridges develop hair cracks, which are immediately harmless; yet, overtime, the cracks widen and compromise the solidarity of the construction.
Certain engineering of bridges is formed much like a chain. If one link of the chain is weakened or broken, the bridge is primed for disaster. When heavy vehicles such as trucks pass over cracks, they begin to widen and extend to other areas of the construction.
Engineers often inspect bridges over periods of time for cracks and other detriments to its support. Often, sections of bridges are repaired so they will not affect other areas.
A technological solution
Sensors are contributing to the inspection process. Sensors, imbedded into bridges as part of real-time monitoring systems, can warn engineers of a bridge's failure.
A "weigh-in-motion" system tracks speed and weight of passing traffic in order to assess the ability of the structure to sustain the weight.
These sensor systems are designed to stay embedded through the duration of the bridge's life. Ohio has already started using the system in a number of their bridges.
It would make sense for these sensors to be situated in every bridge across America. Unfortunately, the system is very costly. One government official was quoted in saying, "When you invest that much money into a piece of infrastructure, you want to have some measure of how it's performing."
Orignal From: Why do I see guys doing bench press with chains draped over the bar?
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