The role of sodium in sports practice
Sodium in sport is often reduced to its role as an electrolyte. However, this is a somewhat reductive view, as this mineral is involved in many mechanisms related to performance, such as muscle contraction, nerve impulse transmission, and maintaining fluid balance. During prolonged effort, such as running, cycling, triathlon, or trail running, sodium losses through sweating can become significant.
Because when you sweat, you do not only lose water. Sweat is indeed primarily composed of water and sodium, as well as potassium, magnesium, calcium, zinc, and even lactic acid, in smaller proportions. It should be noted that the amount of sodium present in sweat varies greatly from one athlete to another. The white marks on your cap after a run in the sun, and not on your sports partner's, is because you lost more sodium!
In endurance sports, the challenge is therefore not just to drink, but to maintain a balance between water and electrolyte intake.
Sodium, an electrolyte at the heart of performance
Sodium participates in several essential physiological functions, including:
the maintenance of fluid balance,
the transmission of nerve signals,
muscle contraction,
the regulation of blood volume,
the stimulation of the sensation of thirst.
On the field, an adequate intake of sodium promotes better fluid retention and helps the body limit the effects of dehydration during prolonged effort.
Why do sodium needs increase during effort?
It’s no mystery, the longer, more intense, or heat-induced the effort, the greater the sweat losses. For an endurance athlete, losses are therefore more significant during a marathon, a triathlon, an ultra-trail, a long bike ride, or simply a summer training session. And in this context, drinking only water for several hours can sometimes excessively dilute blood sodium. Although rare, this phenomenon can promote exercise-induced hyponatremia, a potentially serious situation mainly observed during long-duration endurance events. That’s why hydration plans set up by sports coaches generally combine water, carbohydrates, and electrolytes. A strict framework, but necessary!
Sodium, cramps, and fatigue: a common misconception?
Cramps have long been attributed solely to a sodium deficiency, but the reality is more nuanced. Indeed, current research tends to show that cramps result from a combination of factors, including neuromuscular fatigue, intensity of effort, training level, hydration and electrolyte balance. Sodium plays a role, but it is not the sole culprit.
On the other hand, a water deficit associated with significant sodium losses can indeed accentuate the feeling of fatigue and complicate the maintenance of intensity over time.
How much sodium should be consumed during sports?
Each individual, each organism, and each way of training is unique, so there is no universal data applicable to all athletes. The needs depend notably on:
the rate of sweating,
the climatic conditions,
the duration of the effort,
the level of training,
the sodium concentration in sweat.
However, in the context of prolonged effort, recommendations are around 300 to 600 mg of sodium per hour, with sometimes higher needs for athletes who sweat profusely or perform in very high heat.
But be careful, trying to consume more and more sodium makes no sense. Like the management of energy reserves, the goal remains to find the right balance between intake and individual needs.
The best sources of sodium for endurance athletes
As long as it is balanced, the daily diet generally covers basic needs. However, during long efforts, we can only recommend that you supplement.
Electrolyte-rich sports drinks
A sports energy drink well thought out should provide you simultaneously with:
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water,
sodium,
carbohydrates.
This combination is designed to promote your hydration, of course, while supporting your energy reserves during sports activity. Within the range of isotonic drinks Baouw, you have a choice! Lemon isotonic drink, peach-rosemary, mint-melissa or even watermelon-pomegranate: our team has thought of the tastes of all athletes!
Naturally salty foods
At Baouw, we certainly design products for sports nutrition organic, healthy and good, but we also enjoy the raw pleasures of the table! So, let's focus on these everyday foods that contribute to your sodium intake:
olives,
cheese,
broths (homemade as much as possible, of course!),
seafood,
mineral waters rich in sodium, St-Yorre leading the way.
Energy products suitable for endurance
In long formats, endurance athletes are mainly looking for solutions that provide carbohydrates and electrolytes. The energy purees and gels help meet both energy and hydration needs, without affecting digestion during effort. For even more comfort, our new formats of energy sticks also contain the right dose of sodium to support you during effort!
Should you take sodium before or after sports training?
The question deserves to be asked! Let’s clarify that before the effort, a balanced meal naturally containing sodium helps optimize your hydration status, especially when you are preparing for a session of sport when it is hot. Some recommendations mention an intake of about 500 mg of sodium before an effort made under such conditions, but again, the rule is to adapt your intake to your practice.
After the effort, sodium also contributes to rehydration. Combined with water and carbohydrates, it promotes the restoration of fluid balance and recovery. At this point, you can aim for a protein drink, ultra-complete, which will give a boost to your muscle recovery and help you replenish your protein stores, BCAA, carbohydrates, vitamins and electrolytes. It also helps limit oxidative stress induced by exercise. These recovery drinks are ideal for significant efforts, where your muscles have been put to the test!
Finally, after a moderate intensity effort, for example at the end of a 1h30 run in fundamental endurance, our electrolyte tablets will be sufficient to meet your needs.
Moral: do not underestimate the power of sodium!
Maintaining fluid balance, supporting proper muscle function, and contributing to performance during prolonged efforts: for the endurance athlete, sodium has more than one asset up its sleeve!
However, your contributions must be adapted to the weather, the duration of the event, the level of training, and the amount of sweat produced. As is often the case in sports nutrition, the most effective approach is the one that adapts to your profile, your feelings, and your goals!
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