Episode 237: Cardio Series Part II- Intensity, Duration, and More
Aug 23, 2023
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This podcast explores the impact of combining cardio and lifting in a single program and delves deep into the Interference Effect. They also discuss the atmosphere of Hawaii and the impact of a mild hurricane. Announcements are made about supplements, seminars, and website improvements. Definitions and explanations are given for physical activity, exercise, and training, including the measurement of cardi respiratory fitness. The limitations of using metabolic equivalents and RPE as measures of training stress are discussed. A summary is provided on cardio and conditioning, covering intensity, duration, concurrent training, satellite cell response, and the impact on strength performance.
Adding conditioning to resistance training can reduce improvements in strength, hypertrophy, and power, known as the Interference Effect.
Determining the intensity of conditioning involves considering the aerobic lactate threshold and the maximal lactate steady state.
Using the Rate of Perceived Exertion (RPE) chart can help gauge the intensity of conditioning without monitoring tools or testing.
Deep dives
The importance of conditioning in relation to resistance training
Adding conditioning to resistance training can affect lifting gains. Studies have shown that combining cardio and lifting in a single program can reduce improvements in strength, hypertrophy, and power compared to doing resistance training alone. This is known as the Interference Effect.
Understanding the aerobic and anaerobic thresholds
There are two thresholds to consider when determining the intensity of conditioning. The first threshold is known as the aerobic lactate threshold, where lactate levels increase above baseline. This marks the upper limit of nearly exclusive use of aerobic metabolism. The second threshold is the maximal lactate steady state, where lactate production exceeds removal. This is the highest constant exercise intensity that can be maintained without a continuous rise in blood lactate.
Practical application using RPE
Using the Rate of Perceived Exertion (RPE) chart can help determine the intensity of conditioning. RPE 6 or higher generally meets the minimum intensity for moderate intensity activity, while RPE 8 or higher is considered vigorous. This provides a practical way to gauge the intensity of conditioning without the need for monitoring tools or testing.
The importance of individualization and specificity
The principles of individualization and specificity are crucial in optimizing the effects of conditioning and resistance training. Each individual's fitness level, training history, and personal preferences should be considered when designing a program. Balancing the intensity and volume of conditioning in relation to resistance training helps ensure optimal gains in strength, hypertrophy, and performance.
Effects of Concurrent Training on Strength and Hypertrophy
Despite concerns about an interference effect, long-term data and meta-analyses suggest that strength and hypertrophy outcomes are not significantly affected in most individuals who engage in concurrent training combining resistance training and conditioning. While power gains may be compromised when conditioning is performed immediately before strength training, separating the sessions by a few hours mitigates this effect. The overall consensus is that, for untrained or moderately trained individuals, maintaining a low frequency and volume of conditioning work will not adversely impact strength and hypertrophy outcomes.
Beneficial Effects of Resistance Training on Conditioning
Including resistance training in an endurance athlete's training regimen can lead to greater improvements in endurance capacity compared to conditioning alone. Studies have shown that combining resistance training with conditioning can result in an increase in VO2 max, indicating enhanced cardiopulmonary fitness. The interference effect on conditioning outcomes is minimal, and the combination of both resistance training and conditioning is recommended for overall health and performance, especially in mixed sports.
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