Definition of «narrow grip»

The phrase "narrow grip" refers to holding or grabbing something with your hands close together, usually closer than your shoulder width.

You should use narrow grip and not let your shoulders drop below your elbows on your way down. (fitnessandpower.com)
Now, your arms certainly won't explode if you decide to use a wider or more narrow grip (hand placement) when doing chin - ups. (nicktumminello.com)
Grab the bar with shoulder width grip or slightly narrower grip. (kingofthegym.com)
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