We are all built differently, so what's easy for one guy may not be easy for another. Tall, short, long arms, short arms, long legs, short legs, broad shoulders, wide hips, narrow hips, etc. All of these have a bearing on what's "natural" for our game, so...
Instead of worrying about keeping the arm swing close to your body, try just focusing on your elbow and keeping it "close" as long as possible. Wherever your natural swing goes, it goes. Just try to keep it so that your follow-through (hand) is long, low, and to the outside. Many bowlers' arm swing goes towards the inside because their elbow turns outward too early, and they fight like crazy trying not to pull the ball inside.
It's easier for me to know where my elbow is than what my arm swing or hand is doing. HOWEVER, if the elbow is in the right position, the hand has to follow... Good luck.
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Lane Carter, Strike Zone Pro Shops - Salt Lake City, Utah
Brunswick Amateur Staff