This is what Reebok thinks Helena Christensen should wear to work out. Nothing but kicks! The 41-year-old model stars in the new campaign for Reebok’s EasyTone trainers, which promise to tone your legs while you walk, wearing just the sneakers. In the photograph, she’s also either attempting a set of wall push-ups or to climb a drop-down ladder while nude. We can only imagine how much of an extra challenge this workout was without the proper gear.