The protein and muscle guru Luc van Loon wants you to bulk up—and keep what you've gotOutside's long reads email newsletter features our strongest writing, most ambitious reporting, and award-winning storytelling about the outdoors..At a conference in 2012, Luc van Loon was presenting some exciting data from a . After a heroic research effort that took 2.5 years and 500,000 euros, he and his colleagues had managed to shepherd a large group of frail, elderly subjects through a six-month strength-training program. Those who had taken a daily protein supplement managed to pack on an impressive...…The protein and muscle guru Luc van Loon wants you to bulk up—and keep what you've gotOutside's long reads email newsletter features our strongest writing, most ambitious reporting, and award-winning storytelling about the outdoors..At a conference in 2012, Luc van Loon was presenting some exciting data from a . After a heroic research effort that took 2.5 years and 500,000 euros, he and his colleagues had managed to shepherd a large group of frail, elderly subjects through a six-month strength-training program. Those who had taken a daily protein supplement managed to pack on an impressive...WW…