MBLAQ, who drew much attention as idol group created by singer Rain, has revealed their rough training process before debut.

On the recent recording for jTBC's "Park Kyung Lim's Oh! Happy Day", MBLAQ members revealed Rain's strict rehearsal methods.

The members recalled the rigorous training they underwent during their trainee days. They said, "Back then and even now, we couldn’t match Rain sunbae’s stamina and spirit." G.O added, "We practiced for 14-15 hours a day but he didn’t let us drink even a single glass of water."

Seung Ho continued, "However, Rain sunbae also danced with us and didn't drink water so we couldn't even complain."

In addition, the members revealed about not turning on the air conditioner even in the hot summer days. G.O commented, "I think Rain sunbae has a lot of water inside his body," and had everyone break into a laughter.