Battle ropes are wonderful for core and cardio training. They do require a decent amount of space though. The Hyperwear Hyper Rope is a more compact solution that can still give you a good workout. It requires only 6 ft of space. You can perform a wide variety of exercises with it unanchored.
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The Hyper Rope has a flexible metal core with 15lbs of resistance. It can be used indoors and outside. You can find out more about it here.
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