FUNCTIONS –The stronger spiky massage ball high dense rubber reaches deeper into the fascia for tension release, help to relieve muscular tension, improve blood circulation. Will give you the relief you are want.EXTRA STRONG: Ideal for any size and shape. You can put your entire body weight onto the Stronger Spiky Massage Ball.FULL BODY REFLIFE - With stronger this spiky massage ball, you can sooth and relax tired hands, feet, neck, back and shoulders by targeting tight areas of the bodyEXRCISE WHEREVER AND WHENEVER -The compact design makes the spiky massage ball easily portable, ideal for use at home or away.ATHLETES AND FITNESS TRAINERS FAVORITE - Recommended by Elite Sport professionals, the porcupine style massaging balls are the perfect portable training equipment for men and women's recovery. Don't forget to pack it with your sport, running and football gear.How do they work? With more than 200 pressure points these round spiky rollers can be used as orthopedic foot balls, plantar fasciitis balls, back rollers, neck, shoulder and hand massagers to reduce muscle stress, improve blood flow, increase body awareness and aid in injury prevention and rehabilitation. These playful point massagers are perfect for knots and tight areas. By targeting trigger points, Pointy Porcupine Balls can reduce pain and improve range of motion through specific muscles and subsequently improve joint motion. How to use them? Simply sit or lie down on your massager and employ your body weight or apply pressure by hands to a stiff back, foot, neck or nearly any muscle. By using the right pressure and specific movements (e.g. rub circularly) you can roll those deep tissue trouble-spots, and also help your muscle knots to release. Consult your GP if you’ve had a recent injury or trauma. Where to use them? These easy-to-carry knobby balls can be applied virtually everywhere. Use them for myofascial release therapy to release knots and tightness in muscles (e.g. plantar fasciitis), and target deep-tissue problem-spots. The 3 goosebump massage balls are ideal for a short break at work. Just use them to increase blood flow or gently use them as roller foot balls.