Fitivity gets you better. Looks like you’re here to get better arms. Increase the size of your arms by training intelligently with this Fitivity program. People have been raving about how this program has shown them results within less than a month's time. These workouts include some heavy lifts and other exercises to test your biceps and triceps against band resistance. Each level gets increasingly harder so you never plateau as you will continually shock your muscles groups in your arms