I did the stretching exercises for the first time and noticed that this is what we do in Japan! Its called Radio Taiso ラジオ体. The exercises are pretty standard as well as the music. In ACNH there is one exercise that is not present, but the music is very similar. (⌒▽⌒)

Ai Higuchi - Radio Taisou Lyrics (Romanized) | ラジオ体操 - Lyrical Nonsense

Radio Taiso, the Japanese morning gym and its benefits

taiso_ - Twitch

When Steve isn't restoring stuff, he works in radio - RadioInfo Australia

Conheça a história do rádio, como e quando ele surgiu