IT’S ANOTHER 70 degree and sunny day in Los Angeles, and Charlie Puth is getting to work. No, he’s not creating the melody for his next chart-topping song (at least not yet). Puth is pushing a weighted sled across the length of a tennis court, the early-morning sun beating down on his lean body every step.
For the 31-year-old singer-songwriter, working out isn’t just something he does to stay fit; it’s part of his creative process. Six days a week, Puth exercises for his first two
