LSRFM are the best performers in Kpop and a large part of that success is their devotion to physical fitness. They can effortlessly pull of the most difficult choreos in Kpop, sing live, without collapsing...something most other GGs who rely on easy choreo/lip sync/autotune wouldnt be able to do.
But over the past year or two, i've noticed other GGs following LSRFM's workout routine. Chaekkura's youngest sister Wonyoung is apparently hittin the gym these days and now look at this crazy tweet of Idle Miyeon's quads popping out... 
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