Between my job as a writer and my large breasts, I’ve found that at the ripe age of 33 my posture is seriously not OK. I always knew this, but in the past few years, my shoulders have gone from ...

Mark S., a 27-year-old male, is complaining of left shoulder weakness. Mark trains with weights regularly (3-4 times each week) and has done this for 10 years. Six months ago, while doing the bench ...

A 32-year-old, active man who worked in the military presented with left shoulder pain and weakness 6 months after sustaining an injury while bench-pressing 175 kg. On physical examination, he had a ...

BALTIMORE – A torn pectoralis major muscle, or pec muscle, is a serious injury striking boxers, pro wrestlers, body builders and even a growing number of military servicemen. It's a condition that ...

Please provide your email address to receive an email when new articles are posted on . The pectoralis major muscle originates from multiple locations, including the costal cartilage of ribs two ...

When it comes to strength training your muscles for a sculpted, well-defined chest, you’re probably familiar with your pectoralis major muscles, the large set of muscles that stretch across the upper ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. The major muscle in ...

Chest workouts can look (and feel) so similar that constituent exercises are often just called ‘chest exercises’, without any differentiation about specific muscle groups that each exercise hits. This ...