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L.A.-BASED TRAINER RICHARD GIORLA, who does not train Sheryl Crow, says three things are key to bulking up biceps.

1. Forty-five minutes to an hour of daily cardio to burn fat.

2. A healthy, lean, balanced diet. "It's so important for that cut look," he says.

3. Weight training: "The heavier the weight, the stronger your arms will get." says Giorla.