10 Foods to Never, Ever Eat Before a Workout

What you eat can make your workout, but sometimes what you don’t eat can be just as important. Here are the foods to avoid at all costs before you break a sweat.

Food matters

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There’s an entire industry built around hydrating and fueling up for workouts. But you may not pay as close attention to the foods you should avoid. Having the wrong stuff in your gut can prevent your workout from being as effective as it could be—or, worst case scenario, give you GI issues. “There’s no one-size-fits-all recommendation,” says Leslie Bonci, director of sports nutrition at the UPMC Center for Sports Medicine in Pittsburgh, Pennsylvania. “It depends on how long you’re working out, at what intensity, your weight goals, your gut tolerance.” There are, however, some basic truths when considering what will maximize your performace—and what will sabotage it.

Fuel for thought

Peeled (blanched) and unblanched whole almonds. Shelled almonds on a spoon with a small black bowl of blanched almonds.Melica/Shutterstock

Your main goals in eating before a workout are to stay hydrated and to fuel your exercise. One of the most common mistakes people make is overestimating how many calories they’ll need. Generally, Bonci says, you’ll want to make sure to eat within two to three hours of a workout. But you don’t need much—around 200 calories will do it for a typical moderate- to high-intensity one-hour session. For that reason, and especially if you’re trying to lose or maintain your weight, she suggests incorporating that pre-workout nosh into a meal or splitting your meal to eat half before your workout and half after. That way, you’re less likely to overconsume calories.

Think Goldilocks

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If you don’t eat or hydrate enough before a workout, you may not have the stamina to keep pushing through. But if you eat too much, it can divert blood away from your muscles to your digestive system, slowing you down. You need to strive for a happy medium. Bonci says about 14 to 20 ounces of liquid an hour before you exercise is a good rule of thumb. And as far as food goes, you’ll want a mix of protein and carbohydrates for fuel. “What you eat before you work out won’t be immediately available as an energy source for you,” says Bonci, “but it will help prevent hunger and keep your body from tapping into muscle stores to get energy.” Read on to find out which foods, including some normally healthy ones, you should avoid pre-workout.

Heavy carbs

Penne pasta with pumpkin, chilli and parsley in plate on white wooden background. Top view. Copy space.nesavinov/Shutterstock

Your body needs carbs as a quick source of energy, but you can easily overdo it. “Carb loading doesn’t mean carb bloating,” says Bonci. You want a moderate amount of complex carbohydrates (whole grains over white pasta and bread), and you need enough fluids to help your body use those carbs as an energy source. Watch out for these other fitness myths that can seriously damage your health.

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Fitness – Reader's Digest