Body weight exercises
Learning Center
Zinc for colds: The final word?
Everyone's heard of taking zinc for colds. But does it really work?
Video: Step-up exercise
The step-up is an exercise for the legs and buttocks. See how it's done.
Video: Squat exercise
The squat is an exercise that targets the leg muscles. See how it's done.
Video: Modified pushup
The modified pushup is less challenging than a classic pushup. See how it's done.
Video: Lunge exercise
The lunge is an exercise that targets the leg muscles. See how it's done.
Video: Abdominal crunch
The abdominal crunch is a classic core-strength exercise. See how it's done.
Valerian: A safe and effective herbal sleep aid?
Valerian — Can this sleep aid help you sleep better?
Stuttering
Stuttering, sometimes called stammering, is a speech condition that involves problems with rhythm and flow when speaking.
Probiotics and prebiotics: What you should know
Probiotics are foods or supplements that contain 'good' bacteria that might help treat or prevent illness. Should they be part of your diet?
Natural remedies for depression: Are they effective?
For some people, certain herbal and dietary supplements seem to help with depression, but more studies are needed on their effectiveness and side effects.
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