I recommend this simple foam elbow pad. I have found that I lean my elbows on the table at work as I have had severe elbow pain (tendonitis) for the past few months. Since then I've been looking for an elbow brace for a long time but the best I could find was this one that only comes in so many colors. However, much to my surprise, it fits perfectly in my desk and offers enough padding to relieve the pain when I lean on my elbows. I've definitely noticed a definite difference. I wish it was more plush, had better colors and felt more substantial, but it does the job and I'm generally happy with it.
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