囚徒健身：用失传的技艺练就强大的生存实力

The concept of using 'lost secrets' from prison culture is intriguing—did the author experience or research this environment firsthand?

The gradual approach makes sense but also felt demanding. How did others feel about the difficulty level for beginners?

The focus on bodyweight exercises and minimal equipment is unique—does it really hold up against traditional strength training for long-term results?