Fitness basics
Learning Center
Video: How to use a peak flow meter
Asthma attacks taking you by surprise? Take regular peak flow meter readings, as shown in this video, to predict asthma episodes and better control your condition.
Video: How to use a single-dose dry powder inhaler
Watch these step-by-step instructions for using a single-dose dry powder inhaler.
Video: Knee extension with weight machine
The knee extension exercise targets the front of the thigh. See how it's done.
Video: LASIK eye surgery
How is LASIK eye surgery done? Watch this video to find out.
Video: Lat pull-down with weight machine
The lat pull-down targets the side of the chest wall. See how it's done.
Video: Lunge exercise
The lunge is an exercise that targets the leg muscles. See how it's done.
Video: Lying hamstring curl with weight machine
The hamstring curl exercise targets the back of the thigh. See how it's done.
Video: MRI
Having an MRI? Find out what to expect and how to prepare for this common imaging scan.
Video: Mammogram for breast cancer — What to expect
Watch video to see what it's like to have a mammogram, or breast cancer detection exam.
Video: Melanoma — Early stage and advanced melanoma
Melanoma — Video explains early-stage melanoma and advanced melanoma.
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