We have three different muscle contractions when exercising and they are concentric in which the muscle shortens, eccentric in which the muscle lengthens and isometric in which you are in a fixed position. When you think of a bicep curl, you have an eccentric movement as you lift the dumbbell while squeezing the bicep, then eccentric as you stretch and lengthen the head of the bicep as you extend your arm. However, there is an isometric movement when you hold pressure, and it is the strongest eccentric movement at the point because you have no momentum on your side, you are going against everything while reducing the weight in a controlled manner. Say no to plagiarism. Get a tailor-made essay on “Why Violent Video Games Should Not Be Banned”? Get an original essay Next we do a triceps extension in which you have a concentric and eccentric contraction but not isometric. And again, you're strongest at the concentric point because you're almost relaxed at the eccentric point. With a lateral raise you have a concentric movement which brings the weight up, an eccentric which brings the weight down and if you hold at the top the movement is isometric. And the highlight would be the bottom of the eccentric movement. With a quad extension, you have the three contractions concentric with the bend up, eccentric when you lower it, and isometric when you hold it. The strongest movement here would also be the eccentric contraction because you generate tension in the muscle that is 50% greater than the concentric contraction. In a hamstring curl, the concentric would be the backward curvature of your heel, with the eccentric of the heel coming all the way back and isometric as you hold the weight at the top of the contraction. The strongest contraction would again be the eccentric movement creating stronger tension. Now a shoulder press, we have the concentric with the push up, eccentric with the push down and then isometric with the grip at the top of the contraction. The strongest contraction is eccentric slowing and stabilization. With a front raise you have the movement concentric with the rise, eccentric with the descent of the weight, and isometric with the grip at the top. The strongest contraction is again the eccentric because the tension is very high during the downward movement. Keep in mind: this is just a sample. Get a personalized paper now from our expert writers. Get a personalized test A squat you will have a concentric movement pushing up, an eccentric with the bottom of the squat and an isometric at the top of the squat holding. The strongest contraction would be that of the eccentric because the tension is strongest at the bottom of the squat. With a downward lateral pull, you have the concentric movement with the lateral pull with the downward movement and contraction of the lateral, eccentric when you go back up, then isometric when you hold the downward lateral pull. The strongest contraction will be that of the upward eccentric controlling all upward tension. In the last row, you have the concentric movement when you bring the weight toward the body, the eccentric when you slowly bring the weight out, and the isometric movement when you maintain upward pressure. The strongest contraction is the eccentric as you lower the controlled weight from the squeeze up. What I learned is where the contraction is strongest and I also felt the..