The sources of exposure are unclear, but officials said it was almost certainly from contact with an infected waterfowl.

According to a spokesperson for the zoo, testing confirmed that highly pathogenic avian influenza (HPAI) was the cause of ...

A Chilean flamingo and a harbor seal at Lincoln Park Zoo have died from avian influenza, or bird flu, zoo officials confirmed ...

Muscle stem cells are adult stem cells, present in skeletal muscle tissue, which can self-renew and are capable of giving rise to skeletal muscle cells. These stem cells are activated in response ...

You don't have to be a professional football player to need strong calf muscles. When your lower-leg muscles are in shape, they help you move and feel better. The calf muscle actually refers to ...

The random muscle twitch is at best annoying and at worst, a sign of a neurological condition. Meet the Experts: Christopher Fry, Ph.D. associate professor of athletic training and clinical ...

YOU WANT IT all: more muscle and less body fat without spending all day, every day in the gym. Like most guys, you probably have a job, kids, friends, and family that demand your time, and maybe ...

Looking to build muscle but feeling overwhelmed by conflicting advice? We got two top trainers to break down exactly how to structure your weekly workouts for maximum gains. Whether you’re a gym ...

Discover why some people build muscle faster than others and learn science-backed strategies to optimize your muscle growth and strength training results. Giselle Castro-Sloboda Fitness and ...

Some want to gain weight for sport, e.g., to move up a weight category. Regardless of why you want to increase your weight, it’s generally best to gain muscle without accumulating too much extra body ...

If your resolutions for the new year include fitness, you may be wondering how long you’ll have to work to start seeing changes in your muscle definition. Many people expect to see quick results ...

You don’t need to be a push-up pro to build upper body strength and muscle. There are plenty of other great exercises to target your upper body, and this dumbbell workout features six moves to ...