Marble Falls coach Beef charged with building the complete athlete

CAPTION: Marble Falls strength and conditioning coach Karl “Beef” Bielfeldt walks through the ranks of Mustangs and Lady Mustangs before giving them the next mat drill move. Staff photo by Jennifer Fierro To know what drives coach Karl “Beef” Bielfeldt, simply log onto his social media and read it. It’s right after his handle. Witnessing his athletes change their bodies and transform their mentalities when they didn’t think they could is a joy Beef knows. “To see a kid do it in that moment,” he said with a smile. “All the…

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