I'll show you this video, that surprised me a lot back then when I first saw it.
This is Niel from Teen Top.
He's practicing his singing skills while running on a treadmill. At first, I thought he was just listening to a song. But then he started recording again because he thought he sounded bad, that's when I found out that he was singing liveㄷㄷ
-Hul... That is so mind-blowing...
-Does anyone know the title of the song? I really like it...
-I was waiting for Niel to start singing live, I thought he was listening to a song... That's crazy...
-I really like his voice...
-He doesn't sound like he's running on a treadmill at all, I thought it was just a song he listened to in the backgroundㅋㅋㅋㅋ It took me awhile to realise that it was his actual voiceㅋㅋㅋ
-B.A.P has a push-up movements in one of their choreographies...ㅋㅋㅋㅋㅋ
-I think I've seen TXT practice like this too...
-Boa invented this practice...
-Dong Youngbae also practices his singing skills like this... It's so cool...
-If that were me, my lungs are probably going to explode in no time...
-My bias also practices like this... Idols are really amazing...
-I'm exhausted just by walking around... Can't imagine how hard it must be to sing while running on a treadmill. They're really amazing...
-Whoa... That's crazy...
-Niel has a really great voice...
-He's so good at that... I can't even run, let alone running while singing at the same timeㅋㅋㅋㅋ
-I really love this song!
-I throw up just by doing either singing or running. Can't relate at all...