The barbell suitcase iso-hold isn't fancy, but that's its beauty. It's one of the simplest ways to increase total body strength from the grip and core position.
This is an "anti" position. Any time you can train the core in one of these positions while challenging grip strength and full body tension, consider it a catch-all movement: something worth prioritizing.
The length of the bar and the end loading that takes place when weights are added to the collars makes this a killer. Can you just use dumbbells instead? Not if you want all the benefits. The barbell is what makes this so awesomely challenging.
By grabbing in the middle of the bar, your grip is produced globally from the entire upper extremity. It dictates whether or not you can hold the load and stabilize it equally from front to back. If your wrist position isn't perfect the bar will drift. If your thumb and index fingers are firing hard and your other three digits are lacking, the bar will fall backwards. It's self-limiting feedback, which is priceless for improving grip force recruitment.
If you've never experimented with this, you'll be blown away at the sympathetic response. In just a few rounds on both sides, your heart rate will be skyrocketing, your core and glutes will burn, and you may even get a little bit of a shake. Perfect. That's the type of response that builds grip and full-body strength.
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