'Infinity Challenge' member Gil revealed a picture of Noh Hong Chul's calloused hand through his Twitter. On July 15th, he uploaded the above photo and wrote, "Poor hand of our Hong Chul. I am touched when watching 'Infinity Challenge'. Next time, I will post a picture of all the members' hands. Special training till July 30th. Attention~" Fans were able to see that Noh Hong Chul's hands were full of callouses and popped blisters. Although it looked quite painful, Noh Hong Chul is full of smiles, as always. The lesions on his hands are the result of harsh training due to the rowing special on "Infinity Challenge". Kim Tae Ho PD said,  "The members have been working extra hard for the competition. Sometimes they practice starting from 6AM, sometimes they practice when it's raining hard. I don't know if they're doing well, but they're definitely trying their best." Netizens wrote, "Prettiest hand in the world", "It makes me more excited to see the competition", "'Infinity Challenge' does so well because they work so hard", "It looks like it would hurt a lot". The competition "STX Cup Korea Open Regatta", which the 'Infinity Challenge' members are preparing for, takes place on July 30th. Source: Newsen via Nate