Tag: nutrition

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Our sports medicine physician shares how temperature can affect physical fitness and which temps are best for your workouts. @ClevelandClinic Matthew Kampert, DO,

Person hiking outdoors in cold weather, and person hiking ouotdoors in hot weather

Cold vs. Heat: Which Temp Burns More Calories?

Any extra calorie burn from exercising in cold or hot temps is minimal

Everyone has their preferences for how they want to exercise. Some like to wear layers and turn up the heat when pumping iron. Others like to run for miles, no matter how cold it is outside. But have you ever given any thought to how many calories you’re burning when it’s cold or hot — and if one burns more calories than the other?

Sports medicine physician Matthew Kampert, DO, shares how temperature can affect physical fitness and which temps are best for your workouts.

Is cold or hot weather better for burning calories?

It takes a lot of energy — in the form of calories — to keep you alive. Even when you’re at rest, your body is constantly burning calories to do vital things like keep your heart beating.

It also takes calories to keep your core body temperature at about 98.6 degrees Fahrenheit (37 degrees Celsius). If your body gets too hot or too cold, it burns extra calories to get your core body temperature back to a healthy range. This process is called thermoregulation.

“The harder your muscles work, the more calories you burn,” says Dr. Kampert. “So, if you’re exercising in hotter or colder weather, your body has to work harder to regulate its temperature while you’re exercising.”

Both cold and hot weather can slightly increase the number of calories your body burns. But for most people, the difference is so small that it won’t have much impact on weight loss. It’s the workout itself that’s responsible for burning most of your calories.

Dr. Kampert explains how calorie burn changes in both cold and hot environments.

Burning calories in the cold

In colder environments, your body works to keep your core temperature from dropping. To do that, it first tries to conserve heat. If that’s not enough, it starts generating more heat. This process involves several different mechanisms, such as:

  • Vasoconstriction: Your blood vessels narrow and send less warm blood to the surface of your skin to help reduce heat loss.
  • Brown adipose tissue activation: Everyone has brown fat, a special kind of fat that burns calories to generate heat, helping your body maintain its temperature.
  • Shivering: When you’ve got the chills, your muscles automatically burn calories and generate heat by rapidly contracting and relaxing.

“Your muscles require energy every time they move, even when it’s an involuntary action like shivering,” explains Dr. Kampert. “You may burn a few extra calories when you’re cold, but the increase is small and isn’t enough to make exercising in cold weather a weight-loss strategy.”

Plus, without proper protection and enough layering, long-term exposure to cold weather could lead to injury and impact dexterity, flexibility and muscle strength.

Burning calories in the heat

Some people intentionally exercise in the heat or wear extra layers to make themselves sweat more, thinking it will help them burn more calories. But sweating doesn’t always equal an increase in calorie burn. It’s simply your body’s way of cooling itself down through thermoregulation.

When your body overheats, it works to lower your core temperature to healthy levels. It does this primarily through:

  • Vasodilation: Your blood vessels widen to send more warm blood to the surface of your skin, allowing heat to escape.
  • Sweating: Sweat evaporates from your skin, carrying heat away from your body and helping prevent overheating.

“Sweat evaporates more easily in hot, dry environments,” says Dr. Kampert. “In humid environments, the air is already saturated with water vapor, so it becomes harder for your body to cool itself down and harder to exercise.”

Trying to make yourself sweat more by exercising in extreme heat or wearing heavy clothing isn’t an effective weight-loss strategy. Instead, it can increase your risk of:

  • Dehydration
  • Heat cramps
  • Heat exhaustion
  • Heatstroke

A better approach to working out in any temp

Working out in extreme temperatures poses significant risk for older adults, young children and others with a reduced ability to regulate body temperature.

Check in with your healthcare provider before exercising in cold or hot temps if you:

  • Have cardiovascular disease
  • Have diabetes
  • Have obesity
  • Take certain medications, like blood thinners

“If your goal is to burn more calories, the intensity, duration and consistency of your workout matter far more than the temperature of your surroundings,” stresses Dr. Kampert. “When exercising, focus on training safely and be prepared for inclement weather.”

Avoid wearing too many layers or accessories on your next cold run. Excess sweat can cool your body too quickly after exercising, making you feel colder. Instead, Dr. Kampert suggests wearing:

  • A synthetic moisture-wicking base layer, like nylon or polyester
  • An insulating middle layer, like fleece or wool
  • A windproof or weatherproof outer layer

When it comes to the heat, stick to clothing that’s:

  • Lightweight
  • Light-colored
  • Loose fitting

In either case, you want to stay hydrated and take things slow. If you feel dizzy or distressed, or if something doesn’t feel right, stop what you’re doing and head inside for recovery.

“Exercising in extreme temperatures increases the intensity of a workout, but it comes with its own set of risks and won’t increase how many calories you’re burning in any significant way,” reiterates Dr. Kampert. “If you’re looking to burn more calories, try progressing your workouts by increasing the amount of sets, reps or weight you’re lifting.”

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Recipe: Spaghetti With Fresh Tomato Sauce and Roasted Vegetables @ClevelandClinic #nutrition

Why not try your hand at making homemade tomato sauce? The freshness of the tomatoes and the smokiness of the roasted vegetables make this a great topping for spaghetti. If you don’t have your own garden, use canned Roma tomatoes for a tasty dish that includes roasted mushrooms, broccoli and peppers.

Ingredients

Tomato sauce

Olive oil cooking spray
2 garlic cloves, minced
1 small carrot, minced
1 shallot, minced
4 cups peeled, seeded, and diced ripe tomatoes or one 28-ounce can no-salt-added diced tomatoes, drained
1/4 cup dry red wine
1 1/2 tablespoons balsamic vinegar
1/4 teaspoon crushed red pepper flakes, optional
1/4 cup chopped fresh basil

Pasta

1/2 pound whole wheat spaghetti
3/4 pound broccoli florets and stalks, peeled and cut into bite-size pieces
2 portobello mushrooms, halved and thinly sliced
1 red, yellow or orange bell pepper, seeded and coarsely chopped
1 1/2 tablespoons extra-virgin olive oil
1 1/2 tablespoons balsamic vinegar
Freshly grated pepper
2 tablespoons freshly grated Parmesan cheese

Directions

  1. Preheat oven to 400° F. Line a rimmed baking sheet with aluminum foil.
  2. To make the sauce, coat a large pot with cooking spray and saute the garlic, carrot and shallot over low heat until they begin to wilt, about 5 minutes. Stir in the tomatoes, wine, vinegar and red pepper flakes (if using). Cover and simmer slowly for 30 minutes.
  3. Stir in the basil and simmer for 10 minutes more. (To make a smoother sauce, cool and process in batches in either a blender or food processor.) Set aside.
  4. Place the broccoli, mushrooms and bell pepper on the prepared pan. Toss with oil and vinegar. Roast about 10 minutes until crisp or done to your taste. Sprinkle with pepper.
  5. Cook the pasta according to package directions. Drain.
  6. In a large serving bowl, toss the pasta with 2 cups tomato sauce. Top with the roasted vegetables and sprinkle with Parmesan cheese.

Nutrition information (per serving)

Makes 4 servings

Calories: 363
Total fat: 4 g
Protein: 15 g
Carbohydrate: 71 g
Dietary fiber: 4 g
Cholesterol: 0 mg
Sodium: 100 mg
Potassium: 93 mg

— Cleveland Clinic Healthy Heart Lifestyle Guide and Cookbook (© 2007 Broadway Books).

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Fish is packed with lean protein, but its biggest nutritional advantage is omega-3 fatty acids. @ClevelandClinic

August 24, 2026/Diet, Food & Fitness/Nutrition

Best Catch: The Healthiest Fish To Eat

The best choices are high in omega-3s and protein and low in mercury

Fish has earned its reputation as one of the healthiest proteins you can put on your plate. But with so many options in the seafood case, it can be hard to know which ones deserve a spot in your shopping cart.

“It can get overwhelming sometimes with so many choices,” says registered dietitian Julia Zumpano, RD, LD. “The key is choosing fish that give you the most nutritional benefit while limiting your mercury exposure.”

The 5 best fish to eat

Fish is packed with lean protein, but its biggest nutritional advantage is omega-3 fatty acids. These healthy fats can help support heart and brain health and lower inflammation, among other benefits.

Zumpano’s top choices for fish are all high in omega-3s and protein, as well as other vitamins and nutrients.

They’re also low in mercury, a toxic metal that brings health concerns in high amounts.

Here are five fish choices to search out at the market.

1. Sardines

Don’t let their tiny size fool you: “Sardines offer big health benefits,” says Zumpano.

A 3-ounce serving provides about 2 grams of omega-3 fatty acids — one of the highest amounts of any fish. They’re also a good source of calcium and vitamin D, essential nutrients your body needs to work right.

Another perk? They’re inexpensive and easy to keep on hand. You can buy sardines packed in olive oil or tomato sauce and add them to:

  • Salads
  • Pasta dishes
  • Grain bowls
  • Toast

If you’re watching your sodium intake, compare nutrition labels and choose lower-sodium varieties when possible.

2. Herring

Herring is another oily fish loaded with omega-3s. While it contains slightly less omega-3 than sardines, herring still delivers plenty of heart-healthy fats. It’s also swimming in vitamin B12 and vitamin D.

Depending on your preferences, herring can be eaten:

  • Cooked fresh
  • Smoked
  • Pickled
  • Canned

“Herring has a stronger, fishier flavor because it’s rich in those healthy oils,” Zumpano notes. “If you’re trying it for the first time, using mustard and dill is a traditional preparation that’s a great place to start.”

3. Mackerel

Mackerel is another excellent source of omega-3s and lean protein, but there’s one important catch: Not all mackerel is created equal.

It’s best to choose the smaller Atlantic or Spanish mackerel, which are relatively low in mercury, clarifies Zumpano. And pass on king mackerel, a larger predator fish that contains much higher mercury levels.

Mackerel is tasty grilled, baked or poached. The fish pairs well with vegetables, salads and whole grains for a balanced meal.

4. Salmon

No list of healthy fish would be complete without salmon. Popular with diners for its rich and meaty texture, salmon is another excellent source of protein, omega-3 fatty acids and key vitamins.

When it comes to nutritional value, wild salmon holds a slight edge over responsibly raised farmed salmon, notes Zumpano. But both are excellent choices.

“If you have the opportunity to choose wild Pacific salmon, it’s a great option,” she adds. “But don’t be afraid to eat farm-raised Atlantic salmon if that’s what’s available or fits your budget.”

5. Rainbow trout

Rainbow trout is another option in the seafood case that checks a lot of good-for-your-health boxes. It’s rich in lean protein and omega-3 fatty acids while also providing important key vitamins and nutrients.

“Rainbow trout has a mild flavor and soft texture, too, so it’s easy to work into meals,” says Zumpano. Try it baked, grilled or pan-seared. It goes nicely with veggies, salads or whole grains for a balanced plate.

Fish to limit

No fish is completely “bad” for you, given the protein and other nutrients they offer. But some are worth eating less often because they’re lower in omega-3s or potentially higher in mercury or other contaminants.

This list includes:

  • Tilapia: While tilapia is a lean source of protein, it lacks the omega-3 content of other fish. “Most people don’t get enough omega-3s in their diet, so if you’re going to enjoy fish, try to choose fish that are highest in that nutrient,” suggests Zumpano.
  • Tuna: Both fresh and canned tuna provide protein and omega-3s. The concern is mercury. Larger fish tend to accumulate more mercury over time, so Zumpano recommends limiting tuna to about 6 ounces per week. If you buy canned tuna, chunk light varieties generally contain less mercury than albacore.
  • Imported catfish: Most catfish sold in the United States is imported, which brings concerns about potential contaminants, cautions Zumpano. If catfish is a favorite, look for farm-raised fish from the U.S.
  • Larger fish: Mercury concerns typically rise with the size of the fish. The reason? Big fish (like marlin, shark and swordfish) eat smaller fish and absorb the mercury that accumulates in their bodies over time.

Final thoughts

While fish consumption in the United States has risen in recent years, most Americans still don’t eat from the seas often enough, says Zumpano. That adds up to a lot of people missing out on an important source of omega-3 fatty acids.

In general, health experts recommend that adults eat two 4-ounce servings of fish per week as part of a healthy and balanced diet. (Pregnant or breastfeeding women should limit it to one serving per week, given the mentioned mercury concerns.)

Zumpano recommends adding a variety of seafood to your meals. If you’re looking for choices other than the fish cited here, check out the “best choices” list put together by the U.S. Food and Drug Administration (FDA).

“Fish is one of the healthiest sources of protein you can eat,” reiterates Zumpano. “When you choose fish that’s high in omega-3s and lower in mercury, you’re getting the greatest nutritional benefit.”