Hydration in Sports Recovery Webinar

This webinar focuses on hydration and sports recovery. It covers the physiological and biochemical mechanisms behind hydration and dehydration, what hydration status means for health and disease, and practical considerations for sports performance, safety and electrolyte use. Hosted by Ella Kaur (Practitioner Lead, Registered Nutritionist and Nutritional Therapy Practitioner) with guest speaker Ian Craig, Nutritional Therapist, Exercise Physiologist, Founder and Course Instructor at the Centre for Integrative Sports Nutrition.

Key Points Discussed

Why hydration matters for health and disease prevention

• Hydration supports metabolism and physiological processes.
• Proper hydration status is described as beneficial for:
• Urinary stones and urinary tract infections
• Constipation
• Hypertension, cardiovascular issues and stroke
• Several complex metabolic and neurological conditions

Physiology of hydration: a dynamic balance

• Hydration is framed as a balance between intracellular and extracellular water, regulated by osmolarity, electrolyte gradients and membrane transport.
• Total body water is around 60% of the body, mostly intracellular.

Cellular energy link (ATP and mitochondria)

• Dehydration can increase cellular energy demands and impair the mitochondrial processes involved in ATP production.
• Hydration supports ion gradients and oxidative phosphorylation.

Electrolytes and their individual roles

1. Sodium: The dominant extracellular cation, relevant to fluid balance and blood pressure.
2. Potassium: A key intracellular electrolyte, essential for cardiac and skeletal muscle function.
3. Calcium: Involved in cell signalling, muscle contraction, clotting and membrane stability.
4. Magnesium: A cofactor for many enzymatic reactions, linked to cramps, arrhythmia risk and insulin resistance.

Hydration in exercise: performance and heat stress

• Hydration needs vary with exercise intensity and duration, humidity and ambient temperature, and training status.
• Severe dehydration can raise core temperature more quickly and increase cardiovascular strain (e.g., higher heart rate, reduced stroke volume).

Under-hydration and over-hydration (including electrolyte risks)

• Losing around 1–2% of body water can be enough to impair cognitive performance and daily function.
• Symptoms of over-hydration can mirror dehydration.
• Hyponatraemia from drinking too much plain water during long events is highlighted as a key risk.

Key Takeaways

1. Hydration is foundational to metabolism and mitochondrial energy production, and dehydration can increase physiological stress.
2. Electrolytes are not optional for long-duration or heat-exposed exercise, especially to reduce risks such as hyponatraemia from excessive plain water.
3. Monitor hydration using practical tools (urine colour, frequency of urination, and context such as sweat rate and heat), because under- and over-hydration can produce similar symptoms.

Conclusion

This webinar provides a practitioner-focused framework connecting hydration to cellular energy, electrolyte balance, cognition and exercise performance. It also warns against both under-drinking and over-drinking plain water, particularly the risk of hyponatraemia during long events.

This webinar is fully approved by BANT® and accredited for CPD hours.