The barbell curl is often the first exercise a bodybuilder will discover in the gym, and one which delivers terrific results in terms of upper arm mass when they are completed correctly. This is the tricky part, however. Many bodybuilders don’t complete the exercise correctly, and there isn’t a great deal of literature out there dedicated to proper completion of slow and effective barbell curls. Here are four tips for making your barbell curls more productive. Back it up! Keep your back straight for the entire duration of this movement. Slouching or bending over not only places your lower back and neck at risk of injury, but also removes the workload from the biceps and draws it to other parts of the body. If you have a tough time keeping your back straight, you may want to consider ...

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