Your posture directly affects how much air your lungs can hold. Slouching reduces lung capacity by up to 30%. Correcting posture provides immediate breathing improvement — for free.
When you slouch, your ribcage compresses, your diaphragm cannot fully descend, and your lungs cannot fully expand. This reduces tidal volume (breath size) and increases the work of breathing.
Sit tall with shoulders back, chin slightly tucked, feet flat on the floor. Stand with weight evenly distributed, shoulders relaxed. Adjust your workstation so your screen is at eye level.
Wall angels, thoracic extensions, chest stretches and rows strengthen the postural muscles that keep you upright. 5 to 10 minutes daily makes a measurable difference within weeks.