Three traditional abdominal training: 1.During the exercise of the traditional abdomen wheel, the wrists, shoulders, and back are under too much pressure, and the arm muscles are easily compensated so that the abdomen cannot be concentrated, and the exercise itself does not allow the abdominal muscles to fully stretch and contract, so the exercise effect

JOINFIT 1s Quick Adjustable Dumbbell is a household type dumbbell.The weight specification can be adjustable quickly in 1s.For users, according to their physical condition and fitness needs,Quickly increase or decrease the weight of dumbbells in 1s to control and grasp the intensity of training.Because of changing the cumbersome way of disassembly when people use dumbbells

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