Elastic resistance
Learning Center
Ventricular fibrillation
Without fast treatment, this heart rhythm problem can cause death within minutes. Learn the symptoms of VFib and what actions to take to save a life.
Vertebral tumor
Vertebral tumors grow in the bones of the spine, causing pain and weakening the spinal column. Read more about how they’re managed, and what to expect.
Vesicoureteral reflux
Learn about what happens if urine flows backward from the bladder. Usually found in children, this condition boosts the risk of urinary tract infections.
Video: 3 things you didn't know about cold sores
Cold sores on the lips can be embarrassing and tough to hide. Most people who are infected with the virus that causes cold sores never develop symptoms.
Video: Baby's soft spots (fontanels)
A baby's soft spots (fontanels) close when the skull bones fuse together. See how.
Video: Bent-over row with resistance tubing
The bent-over row targets the back of the shoulder. See how it's done.
Video: Biceps curl with resistance tubing
The biceps curl builds strength in the upper arm. See how it's done.
Video: Hamstring curl with resistance tubing
The hamstring curl targets the back of the thigh. See how it's done.
Video: Heart and circulatory system
Watch this video to see how a healthy heart works.
Video: Hip abduction walk with resistance tubing
The hip abduction walk targets the hip muscles. See how it's done.
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