By eHow Sports & Fitness Editor
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Exercising with music is a great way to stay in good spirits and keep your energy up during a workout, and the days of lugging around a cassette player or portable CD player are gone. MP3 players are more lightweight, compact, durable and can store hundreds of songs, depending on the size of your MP3 player's hard drive. MP3 players make exercising with music easier than ever.
eHow Sports & Fitness Editor