HomeBlogBlogDo Babies Need to Cry to Strengthen Their Lungs?

Do Babies Need to Cry to Strengthen Their Lungs?

Do babies need to cry to exercise their lungs?

No. Babies do not need to cry to “exercise” their lungs. A newborn’s lungs get plenty of practice through normal breathing from the moment they take their first breaths, along with everyday activities like quiet alert time, feeding, stretching, yawning, and even gentle grunts. Crying can be loud and forceful, but it isn’t a required workout for healthy lung development.

Where the myth comes from

The idea often stems from the dramatic change at birth: a baby’s first cries can help clear fluid and open air sacs right after delivery. That early transition is different from ongoing “lung exercise” in the weeks and months that follow. Once a baby is breathing regularly, their respiratory system continues to mature without needing prolonged crying spells.

Is crying still normal?

Yes. Crying is one of a baby’s main communication tools. Hunger, discomfort, fatigue, temperature changes, overstimulation, gas, and the need for closeness can all trigger crying. Some babies also have fussy periods (often in the evening) that happen even when basic needs are met.

When crying may signal something else

Occasional crying is expected, but certain signs deserve prompt medical attention. Contact a pediatrician right away if crying is paired with trouble breathing, bluish lips or skin, persistent wheezing/grunting, a fever in a young infant (especially under 3 months), poor feeding, fewer wet diapers, unusual lethargy, or a high-pitched, inconsolable cry that feels out of character.

Gentle ways to soothe without “letting them cry for their lungs”

Comfort measures like holding skin-to-skin, swaddling (when appropriate), offering a pacifier, rocking, white noise, and feeding on cue can calm many babies. For age-by-age nighttime tips and common reasons babies cry after dark, see the full guide here: Why Babies Cry at Night: Gentle Soothing by Age.

FAQ

What are common reasons babies cry at night?

Many babies wake and cry due to hunger, a wet diaper, gas, overtiredness, or needing reassurance. As they grow, developmental changes and sleep cycle shifts can also lead to more frequent night wakings.