Hi, This is Stephen Moore from United Kingdom. I want to share some information regarding resistance bands for gym. Resistance bands are coded by color based on resistance. This color-coded scheme is different for each company, so you have to do a little research before going to the store to purchase your own. And after researching a big problem occurs that from where you should buy, so for this you can go for Atemi-Sports and can get their best ever gym resistance bands.