How Will BTS Endure a Grueling World Tour? We Asked Their Ex-Trainer.
BTS, the biggest band in K-pop, will on Saturday kick off the U.S. leg of a world tour covering at least 11 months, 80 concerts and 34 cities. The physical demands will be intense. In addition to performing high-energy dance routines onstage, they will also devote hours each day to rehearsals, fittings, hair and makeup…