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Inside Exercise

#37 - Exercise in the heat, dehydration, fluid ingestion and circulation with Dr José González-Alonso

Mar 3, 2023
Dr José González-Alonso, expert in exercise in the heat and dehydration, discusses muscle blood flow, fluid ingestion during exercise, cardiovascular drift, dehydration's effect on performance, and the impact of fluid intake on muscle glycogen use. They also touch on topics like blood osmolality, heat and humidity's effects on exercise, and the unknowns in the field. The podcast delves into the relationship between fluid intake, urine production, and osmolality. Additionally, it explores the complexity of fatigue and the role of the periphery in the cardiovascular system.
01:24:39

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Quick takeaways

  • Dehydration during exercise affects cardiovascular function, leading to decreased blood volume and altered venous return, impacting performance.
  • Fluid intake during exercise, especially in hot conditions, helps maintain cardiovascular homeostasis, preventing heart rate increase and stroke volume decrease.

Deep dives

Key Point 1: Dehydration affects cardiovascular function during exercise

Dehydration during exercise leads to a reduction in cardiovascular function, including stroke volume and cardiovascular output. This reduction is due to decreased blood volume and altered venous return. Dehydration also affects blood flow to the brain and muscles, impacting overall performance. Maintaining proper hydration levels can help prevent these negative effects.

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