Halle Berry and her trainer, Peter Lee Thomas, are celebrating the beginning of the weekend with a workout designed "to wake up the biceps, triceps, and shoulders." The actress, 54, posted a series of Instagram Stories demonstrating three exercises she does to tone her arms using wrist weights."Happy #FitnessFriday y’all! Today’s workout is up in ARMS," the John Wick star wrote in an Instagram post promoting her workout videos.