Resistance bands and power bands power bands provide you with endless movement possibilities. They are not dependent on gravity, as are dumbbells and barbells, for example. If you want to add a little weight to a side leg raise, you probably won't be able to do that with a dumbbell or barbell.

       Benefits :-

• Same Muscle Activity , Less Chance of  injury
• Greater Muscle stimulus 
• Stabilization / Core Activation 
• Improve strength & Athletic Performance 
• More exercise option
• Inexpensive 
• Ideal for Rehabilitation
• Stretching & Mobility