If you’ve ever used a smartwatch, fitness tracker or workout app, you’ve likely seen references to “heart rate zones.” But what exactly do heart rate zones mean, and do you really need to pay attention to them during workouts?

Ballmaxxing is when a man self-injects saline or Surgilube into the scrotum to temporarily increase its size. Some men report injecting fluids until their scrotum is the size of a grapefruit or larger.

Intermittent fasting continues to be a popular approach to weight loss and overall health. But does it work, and is it good for your heart?

According to the National Institutes of Health, almost 1 in 4 U.S. adults are considered low in vitamin D.

Urinary tract infections in women are extremely common. Not only is the urethra short; the close proximity to the vagina and anus (both of which aren’t meant to be sterile) makes it prone to infection. And because urinary tract infections occur so easily, questions about them do too. Here is some clarification about them to help dispel myths.

Which diet is best for people with leukopenia?