The upright row is a vertical pull that trains the side delts and traps together, building shoulder width and upper-trap thickness.
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Get FormTwin — free on the App StoreThe upright row trains the side delts (which widen the shoulders) and the upper traps, with the biceps and forearms assisting the pull. A wider grip biases the delts; a narrower grip emphasises the traps.
It can be if you pull too high or use a very narrow grip, which forces internal rotation and can pinch the shoulder. Stopping around chest height and using a wider grip makes it much safer.
The lateral raise isolates the side delts more cleanly; the upright row lets you use more weight and adds trap work but with more shoulder stress. Many lifters prefer lateral raises for delt isolation.
This guide is general fitness information, not medical advice. Muscle involvement varies with form, grip and individual anatomy. Consult a professional before starting a new program.