Running does build muscle (but not as much as other forms of cardio or strength training). (rachaelattard.com)
What other forms of cardio can i engage in to get my heart rate up and burn fat? (rachaelattard.com)
Cycling is known for being a low impact activity; it has a lower risk than many other forms of cardio and is generally kinder to your joints and your whole body. (fitnessandpower.com)