For busy moms or womeen carrier, it is so simple to carry around these bands in one's car or purse. A little band exercise can be conducted in the car (perhaps, while one is sitting in a school parking lot waiting for the kids). It is so simple to tie the band into a loop and perform quick arm or leg thrusts. Done on a daily basis for as little as fifteen minutes, one can see serious improvements in strength, flexibility, and range of movement.
Perhaps one of the most fantastic benefits of these band exercise is its simplicity. As it does not require very strenuous activity, the handicapped or obese can participate and gain the phenomenal benefits of a bit of resistance training. Those suffering from movement-impairing diseases (such as Multiple Sclerosis), can increase circulation and movement through strength band exercise. For people suffering with nerve conditions and other disorders, any kind of movement can be painful, let alone exercise. Band resistance training empowers the user to be in total control of the level of difficulty. There is no need to stand or be uncomfortable when using a Theraband, so one can get in movement without the risk of falling or becoming exhausted.
TheraBands are the only resistive exercise bands endorsed by the American Physical Therapy Association (APTA). These 6" wide latex bands come in different, color-coded resistance levels, distinguished by the thickness of the band:

Band Color Band Thickness Comparison: pounds of pull needed to stretch a 12" band length to 24"
yellow thin 2.5 lb red medium 4.5 lb green heavy 5.0 lb blue extra heavy 7.5 lb black special heavy 9.0 lb silver super heavy 15.0 lb
A thicker band means more resistance. More resistance means harder work but bigger muscles. Some users have even doubled up the bands they are using to increase resistance. Shortening the length of the band you are using also provides more efficient strength training.

Exercise guidelines for Band users:

Don't Warm up the muscle groups before exercising. Don't use body oil with the band. Maintain good posture. Keep your wrists straight and in line with your elbows. Don't bend your wrists. If you start to lose your posture, stop and reposition yourself. Breathe normally. Exhale during the most difficult phase and inhale during the easiest. Don't hold your breath.
Use controlled movements. Don't continue exercising if anything hurts while you are training. Maintain the natural width of the band to keep it from digging into your hands or sliding up your legs. When you finish your workout, stretch. Tip: Make a handle by tying a loop in the band or tying two bands together.
Resistance bands are in wide use throughout the world. They are versatile, portable and easy-to-use (also inexpensive). However, you should consult your doctor or health care provider before beginning a resistance program - or any exercise program. While using the band, stay attuned to your body. If any exercise causes you to hurt - stop! Don't overdo. Caring for a strength band is simple. Just store it out of direct sunlight. Don't use it together with body oil. And regularly examine it for nicks, tears, or punctures that might cause the band to snap. Strength band WorkoutTie the band in a knot to make a loop about a foot long. Loop the band around both ankles. Lie face down on the floor with your arms bent at your elbow - palms on the floor.[Photo] Turn your head to one side. Slowly bend one knee - bringing your foot up towards your buttocks. Return you foot to the floor. Repeat motion with the other leg. Repeat steps 1-2.