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Barbell Medicine Podcast
Episode #236: How Does Cardio Work?
Aug 16, 2023
The hosts discuss the physiological effects of resistance training and cardio, the necessity of cardio, and approach to it. They recount their experience at a powerlifting meet in Grand Cayman. They announce upcoming events and discuss the restocking of supplements. They outline a plan for a cardio and weightlifting series. They explore factors affecting VO2 max and its importance. They discuss physical activity, resistance training, and cardiorespiratory fitness. They examine the effects of resistance training on VO2 max and muscle strength. They distinguish between endurance and resistance training.
01:20:39
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Quick takeaways
- Higher levels of cardiorespiratory fitness are associated with lower risks of cardiovascular disease and all-cause mortality.
- Resistance training and cardio involve opposing forces and have different physiological pathways and adaptations.
Deep dives
Importance of Cardiorespiratory Fitness
Cardiorespiratory fitness is crucial for reducing the risk of cardiovascular disease and all-cause mortality. Higher levels of fitness lead to lower risks, and the relationship is dose-dependent. Individuals with an exercise tolerance of 8 metabolic equivalents or higher have significantly lower risks. Aerobic training, up to three times a week for 30 minutes per bout, has no negative effect on strength or hypertrophy in untrained individuals. There is a strong association between sitting time and increased mortality, but this association is eliminated with the addition of over 300 minutes per week of moderate to high-intensity physical activity.
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