Most soccer fans see halftime as a chance to rest. But for Dr. Krissy Ladner, Director of Sports Performance and Nutrition Education at Herbalife and a sports performance dietitian working with elite athletes, those 15 minutes are the most critical performance window of the entire match.

The reason comes down to how quickly the body loses fluids and nutrients during play. Athletes can sweat out anywhere from one to three liters per hour during intense training or competition. Even a 2% drop in body weight from fluid loss is enough to noticeably reduce performance—slowing sprint speed, impairing ball control, delaying reaction time, and increasing how hard the effort feels. At 4% dehydration, the effects become severe and may even require medical attention. For a 180-pound player, that 2% threshold can be reached after losing less than four pounds of sweat—something that can happen easily in a single 90-minute match played in warm conditions.

This is why halftime is not just a break. It is a fueling opportunity that can shape the outcome of the second half.

What sweat actually removes from the body

Sweat is often thought of as just water, but it also contains key electrolytes—primarily sodium and chloride, along with potassium, magnesium, and calcium. Each plays an essential role in maintaining physical and mental performance.

Sodium and chloride help regulate fluid balance, blood pressure, nerve signaling, and muscle contraction. Potassium supports muscle and nerve function as well as cardiovascular health. Magnesium contributes to muscle function, nerve signaling, and bone health. Calcium is essential for muscle contraction and nerve communication.

When these minerals are depleted, the effects show up quickly: fatigue, muscle cramps, dizziness, headaches, slower reactions, and in more serious cases, irregular heart rhythms. These warning signs often appear before an athlete even realizes they are dehydrated.

This is also why water alone is not enough during longer or high-intensity sessions. While water replaces lost fluid, it does not restore sodium—the key electrolyte that helps the body retain fluid and absorb it effectively. Sports drinks address this gap by combining fluids, electrolytes, and carbohydrates, supporting both hydration and energy replenishment.

Inside an elite halftime fueling strategy

Sports performance experts often break halftime nutrition into three core components: carbohydrates, electrolytes, and fluids.

Carbohydrates: Athletes typically aim for 30 to 60 grams of fast-digesting carbs during halftime. This might come from a sports drink paired with a banana, an energy gel, or chews. The goal is to replenish glycogen stores—the primary fuel for sprinting, cutting, and explosive movement—while also supporting focus and decision-making in the second half.

Electrolytes: Sodium is the priority, supported by potassium and magnesium. Sodium is especially important because it helps the body retain fluid and maintain hydration balance during continued exertion.

Fluids: Athletes generally target 12 to 24 ounces of fluid during halftime, and around 4 to 8 ounces every 15 minutes throughout play when possible. This helps limit dehydration, regulate body temperature, and reduce performance decline without causing stomach discomfort.

From elite athletes to everyday players

Two simple methods can help assess hydration status. The first is weighing yourself before and after training. A body weight loss of 2% or more signals meaningful dehydration and a drop in performance capacity. The second is urine color: pale yellow (similar to lemonade) generally indicates good hydration, while darker shades suggest fluid deficit.

For those who prefer not to use body weight tracking—especially individuals with concerns about body image or disordered eating history—coaches or support staff can monitor changes without focusing on the numbers directly.

These principles are the same ones used at the elite level. The difference is not the science, but the scale at which it is applied.

So the next time halftime arrives, it is worth rethinking what that moment really represents. It is not simply a pause in play—it is a decisive window where the outcome of the match is quietly being shaped, one sip and bite at a time.