Why did Lukas Graham make 7 years?

Frontman Lukas Forchhammer described "7 Years" as a song that summarises his life so far and what he hopes to achieve in the future. He continued: "It's a song about growing older.

Frontman Lukas Forchhammer described "7 Years" as a song that summarises his life so far and what he hopes to achieve in the future. He continued: "It's a song about growing older.
Answers & Comments
Answer:
Disuse (physiologic) atrophy is caused by not using your muscles enough. If you stop using your muscles, your body won't waste the energy it needs to take care of them. Instead, your body will start to break your muscles down, which causes them to decrease in size and strength.