Hydration is one of the simplest yet most frequently overlooked factors that shape training quality. Losing as little as 2 percent of body weight in fluid can noticeably impair endurance, focus and how hard exercise feels. In this article we explain how to manage fluid intake before, during and after training, when electrolytes are needed, and how hot environments and Ankara's dry climate affect fluid balance. The content is for general information; if you have a specific health condition, please consult your doctor.

What Does Water Do in the Body?

Roughly 55-60 percent of an adult body is water. During exercise, water has three key roles:

Temperature control: evaporation of sweat is the main mechanism keeping body temperature in balance.
Circulating volume: when blood plasma drops, the heart works harder to pump the same amount of blood and heart rate rises.
Transport: delivering oxygen and fuel to muscles and clearing metabolic waste depend on adequate fluid.

Joint lubrication, digestion and mental performance also depend on fluid status. In strength training, dehydration shows up as fewer reps and poorer movement quality.

How Much Water? A General Framework

Because sweat output varies greatly between individuals, no single number fits everyone. Still, the following practical framework is a useful starting point:

Daily baseline: 30-35 ml per kilogram is a common reference for adults, around 2.1-2.5 litres for someone weighing 70 kilograms.
Training-day extra: 500-1,000 ml of additional fluid for every 60-minute moderate-to-hard session.
Before training: 400-600 ml two to three hours beforehand and 150-250 ml twenty minutes before the session.
During training: 150-250 ml every 15-20 minutes, depending on stomach comfort.
After training: 1.2-1.5 litres for every kilogram lost.

Calculate Your Personal Sweat Rate

This is the easiest way to tailor your hydration plan, and it can be done in a single session.

Use the toilet before training and weigh yourself in light clothing.
Record how much you drink during the session (e.g. 500 ml).
After training, towel off and weigh yourself again under the same conditions.
Calculation: (Starting weight − Final weight) + Fluid consumed = Total sweat loss.

For example, if you start at 70.0 kg, finish at 69.2 kg and drink 500 ml along the way, your total loss is 0.8 kg + 0.5 litres, roughly 1.3 litres. If the session lasted 60 minutes, your sweat rate is about 1.3 litres per hour. Measuring once in a warm studio class and once in a cooler setting gives a clearer picture.

Electrolytes: When Are They Needed?

Sweat removes not only water but also minerals, above all sodium. Potassium, magnesium and calcium are lost too, but sodium accounts for the largest share by amount.

When electrolyte support makes sense

Intense sessions lasting more than 60-75 minutes.
Workouts in hot and humid environments.
Days with two training sessions.
Heavy sweaters who leave visible salt marks on their clothes.
Intense days with heavy sweating in a hot environment.
People who experience frequent muscle cramps.

When they are not needed

After a 45-minute moderate strength session or a calm mat Pilates class, water and a normal meal are usually enough. For most people eating a balanced diet, the salt in their meals covers the sodium they need.

Practical electrolyte sources

Sports drinks (which also contain carbohydrate).
Electrolyte tablets or powders (carbohydrate-free options exist).
Ayran and kefir, which provide sodium and potassium.
Mineral water, whose mineral content varies by brand.
Bananas, dates and dried apricots, which are rich in potassium.
Soup, which supplies sodium along with fluid.

Ankara's Dry Air and Studio Classes: The Hidden Loss

Ankara's continental, dry climate makes sweat evaporate quickly, especially in heated indoor spaces in winter. Because sweat does not build up on your skin, you may not notice how much fluid you are losing. This is misleading: an intense HIIT, O'Ride Cycle or Reformer Pilates session causes a significant loss. The same applies to anyone who adds swimming to their routine; sweat dilutes instantly in the water, so the loss goes unnoticed.

Bring your water bottle into the studio and make drinking between sets a habit.
A few sips every 15-20 minutes is usually enough.
If you will do a second workout after class, assume the loss may add up.
A headache or fatigue after training is a common sign of dehydration.

After Heavy Sweating

A hard class can cause a large sweat loss in a short time. If you finish your workout in a hot environment:

Drink 250-500 ml of water before training.
Rehydrate after training.
As sweat loss is high, a drink containing electrolytes can be sensible.
If you feel dizzy or your heart races, stop and cool down right away.
Avoid combining alcohol with heavy sweating.

How to Monitor Your Hydration Status

No lab test is required; simple everyday indicators do the job.

Urine colour: pale yellow, like lemonade, means your intake is adequate; dark amber suggests a shortfall. Vitamin B supplements can artificially darken the colour.
Urine frequency: 4-7 times a day is considered normal.
Thirst: a late warning; by the time you are thirsty, loss has already begun.
Morning weigh-in: sudden 1-kilogram drops from one day to the next are usually fluid loss.
Headache and fatigue: common early signs.
Perceived performance: a familiar load suddenly feeling heavy.

Drinking Too Much: Hyponatraemia

The less discussed side of hydration is that drinking too much water also carries risk. When large amounts of plain water are consumed during long activities without replacing sodium, the sodium concentration in the blood is diluted. This condition, called hyponatraemia, can cause nausea, headache, bloating and, in advanced cases, serious health problems.

Practical safeguard: rather than ignoring thirst and loading up on litres of water, choose electrolyte drinks during long sessions and replace losses in reasonable amounts.

Frequently Asked Questions

Do coffee and tea disrupt fluid balance?

Caffeinated drinks consumed in habitual amounts are generally considered to have no net negative effect on daily fluid balance; they also contribute to total fluid intake.

I feel bloated during training. What should I do?

Try drinking smaller amounts more often instead of large gulps. Very cold drinks can upset some people's stomachs.

Is electrolyte deficiency the only cause of cramps?

No. Fatigue, unaccustomed loading, technique and muscle readiness also play a role. Electrolytes are not the only explanation.

Is 3 litres of water a day right for everyone?

No. Needs vary with body weight, activity level, ambient temperature and diet. Someone who eats plenty of vegetables and fruit also gets a considerable amount of fluid from food.

Sample Daily Drinking Plan

On waking: 300-500 ml of water.
Before noon: 500 ml with a meal.
Two hours before training: 400-500 ml.
During training: 500-750 ml spread across breaks.
After training: 500 ml and a meal.
Evening: 400-500 ml; avoid drinking large amounts right before bed.

Conclusion

Hydration requires no expensive supplements or complicated protocols, yet it directly affects performance. Measuring your sweat rate once gives you enough information to personalise your daily target. Drinking small amounts regularly around training, accounting for electrolytes in long sessions and staying alert in conditions that hide losses, such as hot and dry indoor spaces, are the core principles. If you would like a personalised nutrition and fluid plan, you can get support from the dietitian service at O'Wellness Beytepe.

Hydration Guide: Water and Electrolyte Balance in Training