- www.jumpropeworkout.net
"The jump rope workout can be one of the most exhilirating workouts you do. It leaves you feeling energized and with a clear mind, ready for the tough obstacles you may face in athletics, exercise, or just your daily life. Many professional athletes use a jump rope workout in their regimen to stay more balanced, more agile, and quicker than their opponents."

- http://www.heart.org/HEARTORG/Giving/ForIndividuals/JoinanEvent/jump-rope-sub-home_UCM_315609_SubHomePage.jsp
Jump rope for heart

- www.livestrong.com/article/142506-different-kinds-jump-ropes/
Beaded Jump Rope
Speed Jump Rope
Kids Jump Rope
Leather Jump Rope
Cloth Jump Rope

- www.healthylifetoolkit.com/types-of-jump-ropes.html
Licorice PVC Rope

- http://www.webmd.com/fitness-exercise/skipping-rope-doesnt-skip-workout
"What piece of exercise equipment sells for under $20, fits into a briefcase, can be used by the whole family, and improves cardiovascular fitness while toning muscle at the same time? And using it for just 15-20 minutes will burn off the calories from a candy bar? The answer: a jump rope."

- http://healthyliving.azcentral.com/effects-jumping-rope-4559.html
"Jumping rope is a great alternative to a typical aerobic workout. Jumping rope raises the heart rate quickly and burns calories fast. Speeding up the turns of the rope increases the heart rate even more, helping to build endurance. Jumping rope raises the heart rate quicker than most other cardiovascular exercises, making it an excellent exercise for improved heart health."

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