You can go weeks without food and days without water. But you won’t last even a few minutes without breathing. Even so, we tend to forget how important air is. It’s important to know how to breathe better and increase oxygen in the body. Winter respiratory infections, sinus problems, allergies, pollution, asthma, and even stress and tension can make it hard to breathe easily. If your breathing is anything less than deep and full, try these seven tips to breathe better and increase oxygen in the body.

1. Hydrate and humidify. Cold air and indoor heating can dry out delicate respiratory tissues, exacerbating respiratory illness and asthma, and increasing the risk of sinus or upper respiratory tract infections. In winter months, or if you live in a dry climate, use a humidifier—the warm, moist air helps clear excess mucus from the lungs and sinuses and lessens irritation of the respiratory tract.

Steam vaporizers are inexpensive and easy to maintain and can be used with essential oils. Just add a few drops of eucalyptus, peppermint, pine, or spruce essential oil to the medicine cup on the mister, and infuse your bedroom or office with healing scents. To prevent the growth of bacteria and mold, be sure to clean your humidifier properly—use equal parts of warm water and vinegar, and scrub off the residue with a soft brush—and be careful not to over humidify, which can lead to mold growth.

Stay well-hydrated to keep the respiratory tract moist. If you’re sick of chugging water, try spiking it with juice, lemon or cucumber slices, or electrolyte-enhanced drink tablets or powders.

2. Flush it out. Nasal irrigation, a traditional Ayurvedic treatment, has been used for thousands of years to treat congestion and sinus problems by removing mucus and debris from the nasal cavities. You can find a variety of nasal irrigation devices at natural grocers or pharmacies.

Try a neti pot, a small ceramic pot specially designed to irrigate sinuses or a squeeze bottle. Fill either one with 1 pint of lukewarm distilled water mixed with 1 teaspoon of sea salt. Check the health department guidelines in your area; your tap water may contain low levels of bacteria and protozoa that can stay alive in the nasal passages and cause potentially serious infections in some individuals.

During the day, keep nasal cavities clear with sprays designed to moisturize and soothe sinuses. Look for formulas made with xylitol, a sugar alcohol derived from fruits and vegetables that’s been shown to reduce the risk of sinus infections.

3. Use healing herbs. A variety of herbs and supplements can ease congestion, combat allergies, fight respiratory infections, and help you breathe easier. Butterbur, a shrub that grows in Europe and North America, has been used for hundreds of years in traditional medicine to treat cough, asthma, and breathing difficulties, and it’s been shown in studies to ease allergic rhinitis and other respiratory issues. Look for tinctures and capsules standardized for petasin and isopetasin, and choose a formula certified and labeled “PA-free,” meaning it doesn’t contain liver-harming pyrrolizidine alkaloids (PAs).

Additionally, medicinal mushrooms, can help promote healthy respiratory and lung function. And eucalyptus contains myrtol and cineole, compounds that have been shown to treat sinusitis and bronchitis; look for it in combination formulas with other respiratory herbs such as grindelia, dong quai, skullcap, mullein, ginger, peppermint, and wild cherry bark.

Or make your own breathe-easy beverage: combine fenugreek, hyssop, juniper, and licorice, and sip as a soothing tea.

4. Get moving. Exercise may not sound appealing when you’re feeling like it’s hard to breathe, but moving your body can improve lung function and capacity, and clear congestion. Start small: take gentle walks or ride your bike. An elliptical trainer or step machine is a great way to exercise inside when cold weather may exacerbate your symptoms. Work your way up to more vigorous exercises, such as skiing, racquetball, jogging, or dancing. Aerobic exercise increases breathing rate and work the heart and lungs, improving their endurance and helping the body use oxygen more efficiently—which, in time, improves breathing. Running and other aerobic exercises also improve the tone of the diaphragm and intercostal muscles, which improves breathing. If you’re short of breath from a virus, wait until you’re well before exercising.

5. Eat to breathe. A Mediterranean diet—rich in fruits, vegetables, legumes, whole grains, nuts, and seeds, with moderate amounts of dairy, fish, and poultry—has been shown to protect against allergic respiratory diseases, and diets rich in fruits and vegetables have been shown to reduce asthma symptoms. Other foods that boost respiratory health:

  • OMEGA-3 FATTY ACIDS in fish, walnuts, flax, and hemp are associated with improved lung function and decreased symptoms of asthma.
  • APPLES, ONIONS, CITRUS FRUITS, AND TEA are high in quercetin, an antioxidant that reduces inflammation and helps prevent sinus problems.
  • TOMATOES contain lycopene, an antioxidant that helps reduce asthma symptoms and improves pulmonary function.
  • CAYENNE PEPPER, GARLIC, ONION, GINGER, and HORSERADISH break up congestion, thin mucus, and clear excess mucus.

6. Take your vitamins. A handful of common vitamins are critical in preventing respiratory infections, reducing the risk of allergies and asthma, and improving pulmonary function. Some of the best:

  • VITAMIN E is important for immunity, and has been shown to reduce allergic airway inflammation and improve pulmonary function. In the Women’s Health Study of 38,597 women, the risk of developing chronic lung disease was reduced by 10 percent in women using vitamin E supplements.
  • VITAMIN C, a powerful antioxidant, has been linked to asthma prevention; studies also show increased vitamin C can reduce wheezing, improve lung function, and protect against bronchitis and sinusitis.
  • FLAVONOIDS, a group of antioxidants found in many fruits, vegetables, coffees, and teas, have anti-inflammatory properties and can reduce the prevalence and severity of asthma and allergies. Pycnogenol, a supplement that contains a mixture of flavonoids, can be especially effective, and has been shown to increase lung function and improve breathing.
  • VITAMIN D protects against respiratory infections and sinusitis, and low levels of vitamin D have been shown to impair normal lung function and exacerbate symptoms of asthma.

7. Practice breathing exercises. One of the easiest, fastest ways to breathe better is to … breathe better by retraining your body to breathe in a way that increases lung capacity and improves respiratory function.

Try this simple exercise: lie down in a comfortable position, and place your hands on your upper and lower belly. Then breathe in slowly through your nose to the count of five, letting your belly rise and fully expand as you inhale. Slowly breathe out, letting your belly deflate and releasing all the air. Do this for at least 10 full rounds of inhaling and exhaling, gradually working your way up to 5 minutes, morning and night. While lying down is best, you can also practice this technique at your desk, or even standing in line at the grocery store. The idea is to make it a habit—so you’re breathing better all day long.