Fat Loss

Fasted Cardio & Fat Loss (Oxidation) Science Review

by Mike Mutzel

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Does Fasted Cardio Enhance Fat Loss?

Fasted- vs. fed-state cardio is a controversial topic amongst fitness and weight loss experts nowadays. Many online gurus say fasted exercise, specifically cardio, doesn't enhances fat loss. Others will argue that it (fasted aerobics) accelerates body composition changes, make fat-loss easier.

In this short video I review some of the latest studies that have looked at this biology in humans.

In brief, several well controlled studies in humans found that one hour of steady-state cardiovascular training in a fasted state enhances 24-hour fat oxidation while the same duration and intensity of training in a fed state doesn't increase fat oxidation. (1,2)

In contrast, a one-month duration study in young women found no additional fat-loss benefits in fasted cardio vs fed cardio. (3)

Hope you learn a few tips from this video!

Mike

 

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References

 

  1. Shimada, K., Yamamoto, Y., Iwayama, K., Nakamura, K., Yamaguchi, S., Hibi, M., et al. (2013). Effects of post-absorptive and postprandial exercise on 24 h fat oxidation. Metabolism: Clinical and Experimental, 62(6), 793–800. http://doi.org/10.1016/j.metabol.2012.12.00
  2. Iwayama, K., Kurihara, R., Nabekura, Y., Kawabuchi, R., Park, I., Kobayashi, M., et al. (2015). Exercise Increases 24-h Fat Oxidation Only When It Is Performed Before Breakfast. EBioMedicine, 2(12), 2003–2009. http://doi.org/10.1016/j.ebiom.2015.10.029
  3. Schoenfeld, B. J., Aragon, A. A., Wilborn, C. D., Krieger, J. W., & Sonmez, G. T. (2014). Body composition changes associated with fasted versus non-fasted aerobic exercise. Journal of the International Society of Sports Nutrition, 11(1), 459–7. http://doi.org/10.1186/s12970-014-0054-7
  4. Iwayama, K., Kawabuchi, R., Nabekura, Y., Kurihara, R., Park, I., Kobayashi, M., et al. (2017). Exercise before breakfast increases 24-h fat oxidation in female subjects. PLoS ONE, 12(7), e0180472–11. http://doi.org/10.1371/journal.pone.0180472

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