What is the rotator cuff - and why is it so easily hurt?

Kelsie Rogers
Thursday, August 31 2017

You may have heard the term “rotator cuff” before. It is a common location for a shoulder injury. But what exactly is it? And why is it so easy to injure?

The rotator cuff consists of four muscles that surround the shoulder blade (scapula), and help to hold the arm bone (humerus) in the shoulder capsule. In other words, they help to stabilize the shoulder joint.

Each of the four muscles work in conjunction with one another to provide coordination of movement between the scapula and humerus when exercising, participating in sport, or doing something as simple as lifting an arm overhead. The shoulder joint sacrifices stability for mobility, as a result, a small change in muscle coordination can have dire consequences. 

woman playing tennis

Common shoulder injuries include: 

  • Rotator cuff tendonitis
  • Bursitis
  • Rotator cuff tears
  • Labral tears 
  • Ligament strains and tears

Many of these injuries can be avoided by keeping our rotator cuff flexible and strong. Try these three simple exercises each day to prevent shoulder injury: 

1. Shoulder stretch: place arm up on the wall as shown, lean forward into the doorway until a stretch is felt at the front and top of shoulder. Maintain the stretch for 30 seconds, repeat three times. 

2. Shoulder external rotation: Lay on your side with knees bent, head supported and arm on the side on a rolled towel. Rotate the arm at the shoulder without any other movement. Use a light weight, 3-5lbs. Do 3 sets of 10.

3. T raises: Lie face down with your arms out, thumbs up and shoulders back and down. Raise your arms up as your squeeze your shoulder blades together. Lower your arms and repeat. Keep your thumbs up at all times.two sets of 10 repetitions – holding 5 seconds each rep.

If you start to experience shoulder pain, book in with a physiotherapist who can put you on the path to recovery. https://www.lifemark.ca/services/physiotherapy 

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