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Of course one can achieve positive results with arm exercises. Otherwise why would anyone lift weights? There won't be loss of fat tissue but improving strength and flexibility of the muscles will definitely improve how they look. Try Pinterest for ideas.
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You could consider getting a dog or asking a neighbor with a medium/large dog if you could take it along on runs. I live in a very walkable area but some sketchy characters are around. I run mostly at night or towards dusk, due to work. I put on a headlamp, take my 80# mutt with me, and no one ever bothers me.
