In this instructional video, Glenn Dawson, founder of Reset U Fitness, demonstrates a single, safe rotator cuff strengthening exercise designed for beginners or anyone with shoulder pain. He emphasizes proper setup using a foam roller as a head pillow to keep the spine neutral, aligning the forearm at a 90-degree angle with the elbow and shoulder in line with the spine. He advises starting with a very light weight (as low as 1 lb or a water bottle) and performing slow, pain‑free internal and external rotations, focusing on controlled negatives and positives. The exercise is presented as a stabilizer drill rather than an explosive movement; users should perform 2–3 sets to fatigue, prioritizing stability before progressing to more dynamic work. This routine is positioned as the sole rotator cuff exercise needed until the user can safely advance.
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Let's talk about strengthening your rotator cuffs. If you have weak rotator cuffs or you constantly have shoulder pain, you don't know where it's coming from. There's a good chance it's from your rotator cuff. Now, you've probably seen people do all kinds of exercises like this or like this, and all of those are really, really, really cool looking, but they're a lot more dangerous than they need to be. What we're going to do is the safest version that I like to do with anyone when they're starting out. I'm Glenn Dawson, the founder of Reset U Fitness. And what we're going to focus on is making the rotator cuff exercise so in alignment that you can't mess it up. What I want you to do is grab a foam roller and you're going to use that as a pillow. Put your head on the foam roller, keep your spine in alignment. You don't want to be rounded or moved back any way. You want to put your forearm at a 90-degree angle with your elbow and your shoulder perfectly in alignment with your spine. So they're both straight. And grab a light weight. This is a 5-pound weight. This is actually really heavy for this exercise. Start with like a 1-pound weight, maybe even a bottle of water. You're going to grip, you're going to rotate in your pain-free range of motion, nice and slow. If you go back and you feel pain, avoid that range of motion. You're just going to go nice and slow. The whole point of this is to go as slow as possible, create that nice slow negative, and even come up slow. You want this to be a stabilizer muscle, not some muscle where you're super explosive just yet. Start with stability, work your way up to explosivity. Now you would do this 2 to 3 sets until fatigue, and that's literally the only rotator cuff exercise that you need to focus on until you can progress.
