# 13. 마라톤 후반부의 숨은 열쇠, 나트륨이 없는 에너지젤은 왜 효과가 없을까?

![Image](https://upload.cafenono.com/image/slashpagePost/20251127/101937_QcA9RVVbbphhLC8UIj?q=80&s=1280x180&t=outside&f=webp)

[마라톤 후반부의 숨은 열쇠, 나트륨이 없는 에너지젤은 왜 효과가 없을까? : E4A 매거진](https://www.e4a.kr/magazine/?q=YToxOntzOjEyOiJrZXl3b3JkX3R5cGUiO3M6MzoiYWxsIjt9&bmode=view&idx=168706186&t=board)

![Image](https://upload.cafenono.com/image/slashpagePost/20251127/101950_L6mjPxXDsK0q36D5wO?q=80&s=1280x180&t=outside&f=webp)

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