This book investigates the efficacy and safety of various popular fitness programs to determine which methods provide the most significant health benefits. The authors, including the Consumer Guide editorial team and Charles T. Kuntzleman, utilize a comparative framework to evaluate exercise routines. Their analysis prioritizes cardiovascular health as the primary metric for measuring the effectiveness of any physical activity.

This text serves as a foundational reference for individuals seeking to understand the physiological impact of mainstream fitness trends. Experts note that while the data reflects the exercise science of its publication era, the core focus on cardiovascular health remains a standard benchmark in wellness literature.