Sports drink

File:Sports drink variety.jpg

Assortment of commercial sports drinks

Gatorade bottle

Powerade bottle

Prime Hydration Ice Pop flavor

Mizone sports drink

Sports drinks are specially formulated beverages designed to help individuals, particularly athletes, replenish water, electrolytes, and energy lost during physical exercise or sporting competition. These drinks are commonly consumed to prevent dehydration, maintain electrolyte balance, and improve performance. However, the effectiveness of sports drinks has been questioned, especially in cases of only moderate physical activity.

Types of Sports Drinks

Sports drinks are categorized based on their tonicity, or the concentration of dissolved particles relative to the human body:

• Isotonic sports drinks: Contain concentrations of salt and sugar similar to those found in the human body. These are commonly used to quickly replace fluids lost through sweat and provide a boost of carbohydrates.
• Hypertonic sports drinks: Have a higher concentration of salt and sugar than the body. They are typically used after exercise to supplement daily carbohydrate intake, rather than during physical activity.
• Hypotonic sports drinks: Have a lower concentration of salt and sugar than the body. These are ideal for rapid rehydration when fluid loss is more significant than energy expenditure.

Most commercial sports drinks are mildly isotonic, containing between 13 and 19 grams of sugar per 250 ml (about 4–5 teaspoons per 8 oz serving).

Purpose and Effectiveness

During intense or prolonged aerobic exercise, athletes lose fluids and electrolytes through sweating and expend significant energy. Sports drinks are intended to:

• Replace lost electrolytes such as sodium, potassium, calcium, and magnesium
• Provide carbohydrates for energy
• Prevent hypoglycemia and muscle fatigue

However, health experts, including Robert Robergs, an exercise physiologist, have stated that sports drinks are only beneficial for individuals engaging in continuous exercise for more than 90 minutes. For casual or moderate exercisers, water is generally sufficient for hydration.

According to the Australian Institute of Sport, excessive salt intake through these drinks may lead to gastrointestinal distress or worsen fluid balance. Sodium-containing drinks may help prevent hyponatremia (low sodium levels), but primarily in endurance events lasting more than four hours.

A systematic review conducted by the Oxford Centre for Evidence-Based Medicine found that most marketing claims of enhanced performance lacked reliable scientific evidence. Only a small fraction of studies—typically conducted on elite athletes—showed measurable benefits.

Health Considerations

Consuming sports drinks outside the context of intense physical activity can have negative health effects, particularly due to their high sugar content. Research has indicated a strong correlation between sports drink consumption and:

• Weight gain
• Dental erosion
• Increased risk of type 2 diabetes

A study presented at the 2012 Obesity Society conference found that teenagers gained an average of 1.6 kg (3.5 lbs) over two years for each daily bottle of sports drink consumed. This was higher than weight gain associated with regular sugar-sweetened beverages like soft drinks.

Commercial Examples

Notable sports drinks include:

• Gatorade
• Powerade
• Lucozade Sport
• Pocari Sweat
• Aquarius
• Staminade
• Cytomax
• Isostar
• 100PLUS
• Coconut water (natural isotonic beverage)

Related Concepts

• Energy drink
• Oral rehydration therapy
• Dehydration
• Electrolyte imbalance
• Physical fitness
• Energy gel
• Hyperthermia
• Gainer (supplement)

External links

• PubMed articles on sports hydration
• Sports Dietitians Australia – Sports Drinks
• Centers for Disease Control and Prevention – Nutrition

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