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A recent study published in PLOS ONE discussed alkaline water benefits on hydration and exercise performance for athletes trained in combat sports.
Proper hydration is an important part of maintaining health, especially during and after physical exercise. Fluids help to maintain body function by delivering nutrients to cells, controlling body temperature, removing waste, and aiding other internal processes. During physical activity, the body loses water and other fluids through perspiration and breathing. This loss can cause dehydration if fluid levels are not replenished. Exercise-induced dehydration has a number of consequences for general
Limited evidence on alkaline water benefits
Though numerous studies have looked at the impact of hydration on physical activity, there is no consensus on the amount or type of beverage needed to optimize sports performance. Alkaline water is being marketed for various health benefits including its purported
Antioxidants are compounds that help prevent cell damage and disease by neutralizing free radicals—reactive molecules that can sometimes damage body cells and tissues. Some studies also suggest that alkaline water can improve acid reflux by neutralizing stomach acidity. However, there is still debate and limited evidence on alkaline water benefits for physical activity and overall health. A recent Polish study published in PLOSOne examined these claims by looking at the effects of drinking alkaline water on hydration and performance in combat sports.
Hydration needed in combat sports
Combat sports are full contact and include boxing, kickboxing, mixed martial arts, and others. The sports are highly intensive, and contestants lose large amounts of water through sweating during competitions. Many combat sports athletes also limit water intake before fights to lower their weight. Fluctuations in hydration levels and temperature while competing in sports affect muscle strength, reaction speed, and overall performance. Athletes often use tap or bottled water to hydrate during combat due to the large amounts of fluids lost.
During intense physical exercise, the human body might not have enough oxygen to continue energy production. When oxygen is limited, lactate is produced in the body to help maintain energy levels. Lactate is acidic, and high levels increase the acidity of muscle cells. Excess amounts of acid can cause metabolic acidosis, a condition that occurs when the body either produces too much acid or is unable to remove acid quickly enough.
Is alkaline water an effective alternative to sodium bicarbonate?
Symptoms of metabolic acidosis include rapid breathing, decreased muscle function, and fatigue. Severe cases can lead to shock or even death. Patients are usually treated with sodium bicarbonate (baking soda) to lower blood acidity level. However, sodium bicarbonate can cause side effects such as gastrointestinal distress and swelling.
The study involved 16 males who had trained and competed in combat sports for at least 7.6 years. Participants were randomly divided into one of two groups, receiving either alkaline or regular water. Over a three week period, the athletes trained using their prescribed water type, and water intake averaged from 2.6–3.2 litres per day. Hydration, exercise performance, and medical status
Alkaline water benefits on intense exercise
The results of the study showed that athletes drinking alkaline water had improved hydration levels over those using regular water after three weeks of treatment. Alkaline water also helped to balance acid levels in the body, reduce the onset of muscle fatigue, and improve high-intensity exercise performance. Because combat sports are physically demanding, the authors recommend that athletes consume between three and four litres of alkaline water per day during training and competition to optimize hydration and performance.
This research shows that alkaline water can benefit some types of high-intensity physical activity. However, the current study was limited to combat sports athletes only and involved a limited number of participants. Also, the improvements in performance were restricted to periods of high-intensity exercise. Further studies are needed to confirm the health benefits of alkaline water for amateur physical activity and overall well-being.
Written by Braydon Black, BSc
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