For a program to be most effective, Washington recommends sticking to it for at least four to five weeks before changing it ...

Plus, exactly how to train to sculpt your muscles.

Childbirth depends not just on hormones, but on the uterus’s ability to sense physical force. Scientists found that pressure ...

If you've spent any time lifting weights, you've probably noticed your muscles looking noticeably bigger during or right after a workout. It's a satisfying reminder that you actually did something, ...

Muscle fatigue is a decreased ability to create force with your muscles. Electrolyte imbalance and overuse are some of the most common causes of muscle fatigue. Rest and massage are the best ways to ...

Science has spoken: strength training is a must for health and fitness gains. But, as top trainers reveal, what you ... Read More The post How to choose the right weights for your workout appeared ...

Objective Stress urinary incontinence (SUI) is common among females during functional fitness training, such as CrossFit. The aim of this study was to assess the effect of pelvic floor muscle training ...

Oluseun Olufade, MD, is an Orthopedic Surgeon and Assistant Professor of Orthopedics at the Emory School of Medicine. Rest and changes in activity can help treat back spasms that cause lower back pain ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...