# Hydration Strategy for Summer Athletes in New Jersey
If you're training outdoors in Bernardsville or the surrounding areas right now, you're dealing with something most generic fitness advice glosses over: New Jersey's oppressive combination of heat and humidity. It's not like training in dry heat out West. The moisture in the air prevents your sweat from evaporating efficiently, which means your body can't cool itself the way it's designed to. We've seen plenty of athletes show up at our practice with heat-related muscle cramps, fatigue that doesn't match their fitness level, and joint pain that mysteriously appears mid-summer—often the real culprit is dehydration.
The problem isn't that people don't know to drink water. The problem is that "drink water" is too vague. After working with runners, soccer players, lacrosse athletes, and weekend warriors for years, our team has noticed that the athletes who stay healthy and perform well in summer heat follow a strategy—not a generic rule.
Pre-Game Hydration: Start Ahead, Not During
One of the biggest mistakes we see is athletes waiting until they're thirsty to hydrate. By then, they're already behind. Thirst is a late indicator of dehydration, especially in youth athletes and older adults whose thirst mechanism isn't as finely tuned.
Here's what we recommend: hydrate 2–3 hours before activity. Drink about 400–600 mL (roughly 16–20 oz) of fluid. This gives your body time to absorb the fluid and your kidneys time to process it, so you're not sloshing water in your stomach during your workout or game. Then, about 15–20 minutes before you start, drink another 200–300 mL (7–10 oz) as a "top-up." This two-stage approach means you're starting your activity genuinely hydrated, not panicking and chugging water right before you run.
Why does this matter? Athletes who start dehydrated tire faster, their joints feel stiffer (we've noticed this especially in older weekend warriors), and their risk of overuse injury climbs. We've had patients come in with what they thought was a shoulder or knee problem, only to realize the real issue was they were chronically under-hydrated during their summer training block.
During Activity: Fluid, Electrolytes, and Individual Sweat Rate
Here's where most generic advice fails. Not everyone sweats the same amount. A 150-pound runner might lose 1 liter per hour, while a 200-pound soccer player might lose 1.5 liters. If you're both following the same hydration plan, one of you is going to be in trouble.
Our team recommends you figure out your sweat rate. Here's how: weigh yourself before and after a 1-hour training session in typical summer conditions. The difference (in pounds) roughly equals your fluid loss. One pound ≈ 16 oz of fluid. If you lost 2 pounds, you're losing about 32 oz per hour. That's your personal baseline.
During activity lasting more than 60 minutes, aim to drink 400–800 mL per hour (the exact amount depends on your sweat rate, the heat, and your body size). Don't just drink water, though. In New Jersey's humidity, you're losing electrolytes—primarily sodium—through sweat. A sports drink with 6–8% carbohydrate and 20–30 mEq/L sodium is ideal. This serves two purposes: the sodium helps your body retain fluid (so you're not peeing it all out), and the carbs help sustain energy, which becomes critical in the second half of a long game or training session.
We've worked with high school and college athletes who complained of mid-game fatigue or cramping, and switching to a proper electrolyte beverage changed everything. Their performance stayed consistent through the fourth quarter, and they recovered better afterward.
Post-Exercise: The Rehydration Window
Most athletes think hydration ends when the whistle blows. It doesn't. Recovery hydration is just as important, especially if you have back-to-back days of training or games.
Within 30 minutes of finishing, drink 150% of the fluid weight you lost during exercise. If you lost 2 pounds, drink about 48 oz over the next couple of hours. Include sodium and carbs—a chocolate milk, a sports drink, or a balanced snack with water works well. The sodium actually helps your body hold onto the fluid rather than just excreting it, and the carbs replenish glycogen stores in your muscles.
Don't rehydrate all at once. Sipping over an hour or two is gentler on your stomach and more effective at actual fluid retention.
Why This Matters at Our Practice
We bring up hydration with almost every athlete we see, especially during summer months. Poor hydration contributes to muscle stiffness, joint stress, and slower recovery—all things that can become chronic pain if ignored. Athletes who nail their hydration strategy recover faster between sessions, have fewer overuse injuries, and maintain their movement quality even in heat.
If you're training hard this summer in Bernardsville and you're noticing unexplained fatigue, joint tightness, or performance dips, hydration strategy might be the missing piece. Our team at Advanced Health & Physical Therapy Solutions can help you dial in a hydration plan tailored to your sport, body, and local conditions, plus assess whether any movement patterns or muscular imbalances are making you more heat-injury prone.
Stay hydrated. Train smart. We'll see you on the field or in our office.