Hybe did not respond to requests for comment about the band\u2019s training regiment for the current world tour. The U.S. leg begins on Saturday with a show in Tampa, Fla.<\/p>\n
Han Ji-eun, who coaches K-pop stars like Blackpink\u2019s Jennie and Jeon Somi, said she plans their endurance training a year ahead of a tour, and that female stars often start dieting weeks before music video shoots.<\/p>\n
If a star\u2019s best physical features are wide hips or slender arms, Ms. Han said, she works to define them without adding muscle mass.<\/p>\n
\u201cIt\u2019s a job based on your physical image,\u201d she said. <\/p>\n
The K-pop exercise routine is not meant for most people, who should focus on strengthening the muscles they use in daily life and maintaining flexibility in their joints, said Lee Jae Goo, a sports physician at Sahmyook University in Seoul.<\/p>\n
K-pop stars tend to have a high base level for cardiovascular and muscle stress because they train from a young age. A four-minute dance number is as physically demanding as a 1,500-meter track race, said Dr. Lee, who has studied the routines of high-level performers and athletes.<\/p>\n
As for BTS\u2019s diet, Mr. Kim said that he aimed for a proper balance of macronutrients<\/a> like protein, fat and carbohydrates to fuel their performances, rather than banning specific foods. <\/p>\n Does the band get to eat Korean fried chicken<\/a>?<\/p>\n \u201cYes, of course,\u201d he said with a laugh.<\/p>\n Mr. Kim gave massages and rehabilitation treatments to prevent ankle, knee, hip and shoulder injuries, which are common for dancers. Persuading an injured artist not to perform was difficult, he said.<\/p>\n \u201cWhen that happens, the ones who are actually the most upset are the members themselves,\u201d he said.<\/p>\n RM, BTS\u2019s leader, injured his ankle in rehearsal two days before the group\u2019s comeback concert<\/a> in Seoul in March. He spent the hourlong show sitting on a stool onstage, gamely performing the choreography with only his arms.<\/p>\n
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