소개
"Keeping Fit" is a foundational guide to physical culture and personal wellness, written by the influential health advocate Bernarr MacFadden. Rooted in the early 20th-century movement that prioritized natural vitality, this work provides a comprehensive overview of the methods necessary to maintain a strong, healthy body. MacFadden emphasizes the importance of consistent exercise, proper nutrition, and disciplined lifestyle habits as the cornerstones of long-term vigor.