What's Happening?
Exercise physiologists and researchers confirm that cardio plays a beneficial role in body recomposition, the process of simultaneously losing body fat and gaining muscle mass. Contrary to some online claims that cardio can hinder muscle gains, systematic
reviews and meta-analyses indicate that cardio, especially when combined with strength training, is effective for fat reduction. Brent Momb, PhD, a muscle biology researcher, and Ethan Young, PT, DPT, a physical therapist, explain that cardio's primary contribution to body recomposition is increasing energy expenditure, which helps create the calorie deficit necessary for fat loss. Research also suggests that concurrent training (combining strength and cardio) is as effective as resistance training alone for increasing muscle mass in middle-aged and older adults, with minimal interference in whole-muscle growth, particularly with activities other than running.
Why It's Important?
This clarification is important for U.S. individuals pursuing fitness goals, as it dispels common misconceptions about cardio's impact on muscle growth. By integrating cardio into a body recomposition routine, individuals can more effectively achieve fat loss while preserving or gaining muscle mass. Beyond aesthetic goals, the experts emphasize the significant health benefits of cardiovascular activity, including strengthening the heart, improving blood vessel function, supporting brain function, and enhancing blood markers associated with chronic diseases like cholesterol and blood glucose. This holistic view underscores that cardio is not just a tool for body composition but a crucial component of overall well-being, impacting public health by promoting disease prevention and improved quality of life across various age groups in the U.S.
What's Next?
For individuals aiming for body recomposition, the recommendation is to prioritize strength training and adequate protein intake, targeting all major muscle groups at least twice per week. Once a strength training schedule is established, cardio can be incorporated, with a suggested starting point of 2 to 3 moderate-intensity sessions per week, lasting 20 to 40 minutes each, to meet American College of Sports Medicine guidelines for cardiovascular health. For those with limited time, high-intensity interval training (HIIT) is presented as a time-efficient alternative. Both experts advise choosing enjoyable cardio activities to ensure consistency and to monitor overall effort and recovery to avoid overtraining, especially when in a calorie deficit. Considering training phases, such as distinct fat loss and muscle growth periods, and appropriate fueling are also crucial for long-term success.
Beyond the Headlines
The discussion extends beyond mere exercise prescriptions to touch upon the psychological and behavioral aspects of fitness. The emphasis on 'doing what you enjoy' for cardio highlights the importance of adherence and sustainability in fitness routines, a critical factor often overlooked in rigid exercise plans. This approach acknowledges that long-term health and body composition changes are more likely when individuals find pleasure in their physical activities. Furthermore, the mention of 'training phases' (bulking and cutting) reflects a more sophisticated understanding of physiological adaptation, moving away from a constant pursuit of both fat loss and muscle gain simultaneously. This nuanced perspective could influence how fitness professionals in the U.S. design programs, promoting more realistic expectations and sustainable practices for their clients, ultimately fostering a healthier and more engaged population.
