Feature:<br />Can effectively improve muscle strength, physical mobility and flexibility.<br />Improve athletic performance, to help treating a variety of chronic diseases.<br />When you pull the elastic band from the beginning,the longer you pull ,the bigger resistance you will get it.<br />The size of elastic band is in charge of the muscle strength.<br /><br />Description:<br />Item Type: Tension Resistance Bands<br />Color: Red, Gray, Yellow, blue(different color is in different resistance band level and dimensions)<br />Material: Latex    <br /><br /> <br />  <br />   <br />    Resistance Band Color<br />   <br />    Resistance Band Level<br />   <br />    Dimensions<br />  <br />  <br />   <br />    Yellow<br />   <br />    light<br />   <br />    500mm*50mm*0.45mm<br />  <br />  <br />   <br />    <br />     Blue <br />   <br />   <br />    <br />     Medium <br />   <br />   <br />    500mm*50mm*0.55mm<br />  <br />  <br />   <br />    <br />     Red<br />   <br />   <br />    Medium\/heavy<br />   <br />    500mm*50mm*0.65mm<br />  <br />  <br />   <br />    Gray<br />   <br />    Heavy<br />   <br />    500mm*50mm*0.9mm<br />  <br /> <br /><br /><br />Package Include:<br />1 X Tension Resistance Bands<br /><br />How to use:<br />Training for 2 to 3 groups, each group of training repeat 8 to 12 times.<br />Take elastic band fixed on the fixed object of the ground, then form a ring.<br />Lie on the training mat, keep the knees bending.<br />Elbow straight and do sit-ups moves upwards, the shoulder blade off the ground<br />Keep on and continue to do this exercise.