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If you’re anything like me, you’re always interested in finding new, and more importantly, better ways of doing things. Well, climb aboard, that’s precisely where we’re headed.   We’re going to cover two things:   1. Simplify very complex physics and mathematics. Don’t worry, you won’t need a calculator.   2. Transfer the above technical information into practical applications that are guaranteed to instantly improve your arms and many other cable-based exercises.   So if you’re currently performing triceps extensions in your program, then read carefully. Because what you’re about to learn will drastically improve your arm strength, size and definition.   A Quick Rant on “Research”   There’s no opinion based or “one research study showed” material in this article. The information contained has long been proven by the science of physics and mathematics.   There’s a huge difference between quoting research and stating that something has been proven by science. Even though research can be scientific, it doesn’t mean that the end result will be repeatable. Just think about the many similar research studies that wind up showing drastically different outcomes. Remember, in order for something to be scientifically proven, it must be repeatable.   “Research is what I’m doing when I don’t know what I’m doing. ” — Albert Einstein   The Dorky Science Stuff   There’s a principle of physics and vector mathematics called the Resolution of Forces. When understood and applied to resistance training, this concept can greatly improve your program.   Resolution of Forces is the method of resolving a vector into its components. Any vector which is directed at an angle to the customary coordinate axis can be considered to have two parts. Each part is being directed along one of the axe, either horizontally or vertically. The parts of the single vector are called components and describe the influence of that single vector in that given direction.   Think of a dog being pulled upon by a chain. If the chain is pulled upwards and to the right (Diagonal), then there’s a tensional force acting upwards and rightwards upon the dog.   That single force can be resolved into two components: One being directed upwards and the other to the right. Each component describes the effect of that chain in the given direction. The vertical component describes the upward influence of the force upon the dog. The horizontal component describes the rightward influence.   Taking It to the Gym   Now lets think about how triceps extensions are performed with a rope.   Performing a triceps extension with a rope requires the exerciser to gradually spread the rope apart as the movement progresses. Whether you know it or not, this splitting of the rope drastically changes the exercise and the forces involved.   When you use a straight cable bar, the force you exert from both arms is straight down. When you use a rope, things are very different. With the rope, you’re no longer pushing straight down. You’re now pushing at a diagonal. As we learned by Resolution of Forces, your effort of force is now divided into two parts. One part of your effort is pulling the rope down, while the other part is pulling the rope apart.   It’s important to note that the amount of force it takes to spread the rope apart is proportionate to the angle between each side. In other words, the force you have to put out gradually changes as your hands spread.   The Weight Stack Lies   It would seem to be common sense that when holding each side of a rope, you’re splitting the resistance in half, equally between both arms. Which would mean that if you put fifty pounds on the weight stack, each arm would be working against twenty-five pounds, right?   Wrong!   Take a look at what happens to the load as the movement progresses, and the ends of the rope are gradually split apart.   Click here here to see a diagram of how the weight changes in relation to the angle of spread.   With 50lbs on the weight stack at 30 degrees of spread each hand exerts 26lbs of force equaling 52lbs of effort to move 50lbs.   At 45 degrees, each hand exerts 27lbs of force. That’s 54lbs of effort.   At 60 degrees of spread each hand has to exert 29lbs, totaling 58lbs of total effort.   As you can clearly see from the above, the force increases as the rope is gradually spread apart. At 30 degrees, it took an extra pound of force from each side. So now it takes 52lbs of effort to move that 50lbs. At 60 degrees of spread, it took four pounds of additional force from each side. Meaning it takes 58lbs of force to move 50lbs.   From 30 to 60 degrees of spread, the force steadily increased, but the change was minimal, and possibly tolerable. However, take a look at what happens when the rope reaches 90 degrees of spread.   At 90 degrees of spread, it takes 35lbs of force from each hand. In other words, 50lbs now feels like 70lbs. This is a much bigger jump than the previous. Now you’re exerting almost as much effort outward as you are downward.   Finally, at 120 degrees of spread, it takes 50lbs of effort from each hand. This means you’re now exerting a hundred pounds of total force, twice as much as what’s on the weight stack.   Use the Force!   If you’re reading this and thinking, “Isn’t more force a good thing?” Keep in mind that the closer your muscles get to a full contraction, the less force they can exert. You’re gradually getting weaker as the resistance is getting heavier. Not good!   This means that if you choose a weight that’s correct at the beginning, you’ll end up with a weight that’s much too heavy at the end. Say hello to poor form, cheating, and increased joint stress.   The Solution   As my father likes to say, “There are no problems, only solutions. ” So far, I’ve shown you the problem with using the traditional cable rope. I’m not the type of guy to leave you hanging, so now it’s time to provide the solution. If you think I’m going to say stop using a rope and start using a cable bar, you couldn’t be more wrong. A rope is always a better choice because it allows for freedom of movement.   So, are you ready?   Use a longer rope!   Alternatively, you can also use two normal ropes:   Yes. It’s really that simple. This is a small adjustment that makes for a big difference. It really doesn’t matter which option you choose because both strategies achieve the same end result — longer rope ends.   I see you over there scratching your head, wondering how using a longer rope makes things better. Well, I’ll tell ya’. Longer rope ends allow for more consistent force throughout the movement. The force is more consistent because the angle between ropes at the end range is greatly reduced. I could take the time to explain this mathematically, but halfway through, you’d already be off checking your email.   Instead, we’ll just go over a simple compare and contrast.   A long rope means a small angle:   A short rope leads to a big angle:   With a long rope, the force is more consistent:   However, with a short rope, the force is almost doubled:   Click here to see how much the angle is reduced with a longer rope.   Remember, the smaller the angle, the less the resistance increases.   The beauty of this solution is that you probably already have more than one rope at your facility. If you only have one rope and don’t want to buy another one, you can make your own extra long rope very easily with some high quality rope from any nautical supply shop.   And for those of you who are lazy and don’t want to buy or make anything at all, you’re covered, too. Just perform the exercises unilaterally! This will ensure a more consistent resistance and eliminate the diverging force angles factor completely because there’s nothing to separate from.   Problem Solved   I’ve now shown you a very quick and easy solution to a problem you probably never knew you had. In doing so, I’ve exposed to you to some simplified mathematics that can, and should, be applied to improve many resistance-training exercises. If you ignore this new information and stick to the short rope, your shoulders won’t explode, and your triceps won’t fall off. However, if you’re going to do it, do it right

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