Aerobic exercise
Learning Center
Is a home sperm test useful?
Using a home sperm test to check your fertility may not provide a clear answer.
Is depression a factor in rheumatoid arthritis?
Depression is common in people with rheumatoid arthritis. If it isn't treated, depression may contribute to worsening of rheumatoid arthritis symptoms.
Kids and exercise: How much activity do they need?
You know your kids should exercise, but how much? Find out and get ideas for helping children and adolescents be more physically active.
Lack of sleep: Can it make you sick?
Lack of sleep can affect your immune system. Here's what you need to know.
Laryngospasm: What causes it?
Laryngospasm is a brief spasm of the vocal cords, which temporarily interrupts breathing.
Loss of sex drive in men: Natural with aging?
Age-related loss of sex drive is normal, but sometimes an underlying condition is at play.
Low milk supply: What causes it?
Find out what can affect your milk supply and how to boost it.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Mononucleosis: Can it recur?
Mono can return in some rare cases. Learn why that happens.
Ovarian cysts and infertility: A connection?
Certain types of ovarian cysts can contribute to fertility problems.
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