Struggling to stretch your shoulder on your own after a stroke or injury? You’re not alone. External rotation can be one of the hardest movements to work on—especially if your elbow won’t stay in place or one arm isn’t cooperating.
That’s exactly why the Shoulder Flex by ProStretch was made—to give you a simple, adjustable tool that makes stretching easier, safer, and something you can finally do on your own.
What It Does
The Shoulder Flex is specifically built for stretching your shoulder into external rotation (ER)—that motion where your arm rotates outward, like when reaching to buckle a seatbelt or put on a jacket.
If you’ve ever tried to stretch this on your own, you know how easy it is for your elbow to drift or your form to break down. This tool solves that problem.
Here’s how it works:
Step 1: Slide Your Arm In
Gently slide your affected arm into the device. Make sure your forearm rests comfortably along the support bar.
Step 2: Adjust the Bar for a Secure Fit
Use the adjustable features to snugly secure your arm in place. This helps stabilize your elbow and prevent unwanted movement during the stretch.
Step 3: Grab the Handle with Your Other Hand
Reach across with your stronger hand to grab the handle.
Tip: If your hand is tight or difficult to open, you can gently pry it open and place it on the handle.
Step 4: Adjust the Handle Length
Customize the handle length to match your arm so you can stretch comfortably and with control.
Step 5: Begin the Stretch
Slowly move the handle outward with your stronger hand. This will guide your affected arm into external rotation, stretching your shoulder while your elbow stays supported.
You can try doing the exercise while lying on your back.
If you’re looking for a simple, reliable way to improve your shoulder’s external rotation—especially if you’ve been frustrated with doing it solo—the Shoulder Flex by ProStretch is worth checking out. It’s thoughtfully designed to support and guide your arm, so you can stretch more effectively with minimal strain.
Great for stroke recovery, muscle tightness, or general shoulder stiffness, this tool can help you stay consistent and confident in your rehab routine.
