ITEM NAME:5x Fitness Resistance Bands Portable Exercise Loop Band for Gym Workout Yoga New Descriptio n Description: Can effectively improve muscle strength, physical mobility and flexibility Improve athletic performance, to help treating a variety of chronic diseases When you pull the elastic band from the beginning, the longer you pull, the bigger resistance you will get The size of elastic band is in charge of the muscle strength Usage: Training for 2 to 3 groups, each group of training repeat 8 to 12 times. Take elastic band fixed on the fixed object of the ground, then form a ring. Lie on the training mat, keep the knees bending. Elbow straight and do sit-ups moves upwards, the shoulder blade off the ground, keep on and continue to do this exercise. Specifications: Material: TPE Color: Black + Red + Blue + Yellow + Green Size: Length 60cm * Width 5cm Package Included: 5 x Exercise Elastic Resistance Band Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! 5x Fitness Resistance Bands Portable Exercise Loop Band for Gym Workout Yoga New.Lie on the training mat, keep the knees bending. When you pull the elastic band from the beginning, the longer you pull, the bigger resistance you will get. Take elastic band fixed on the fixed object of the ground, then form a ring.