![]() Why: Seated twisting machines are a waste of money and space in fitness facilities. Avoid these unless you want to look you’re rocking to the oldies. (How often do you bend straight to the side to pick something up?) Also, many people use the momentum that the dumbbells create and rock side-to-side instead of properly engaging their muscles. Why: Isolating the obliques in this way is not natural and can add unnecessary strain to your back. It puts a huge strain on the lower back by provoking you to hurl your upper body forward in an attempt to touch your toes. Why: This old-school exercise is responsible for many back issues. There’s a reason these machines are collecting dust in the corner of your gym. This can lead to neck pain as your supporting muscles weaken. By supporting your head, this tool actually deactivates the muscles in the neck that would normally support it. Yes, it’s super easy to do, and that’s why it doesn’t work. Actually, it was shown to be up to 80 percent less effective. Why: The ab rocker was proven to be no more effective than the traditional crunch. Don’t waste countless hours on a less-than-stellar exercise that does little to fully engage your abdominal muscles. Why: The basic crunch is just that-basic. Here’s how they stacked up, along with some of our other favourite (and least favourite) ab exercises: Don’t waste your time with: 1. A study conducted at the San Diego State University Biomechanics Lab examined the electromyography (EMG) activity results garnered by popular core exercises. In fact, many are simply a waste of workout time.
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