Stuck in a meeting? Or on a long drive or flight? Yeah, you need to stretch. Stretching helps your muscles remain limber. And when your muscles stay flexible, your posture improves and you naturally breathe deeper. Expanding your lung capacity means more oxygen-rich blood gets to your brain, leaving you feeling alert, productive, and less stressed.

Here are a few do-anywhere stretches you can try—no one will suspect you’re sneaking in some stress-relief.

Chest elevation. Sit with your arms at your sides and your feet flat on the floor. Gently raise your chest toward the ceiling, but keep your chin level with the floor. Hold this position for 10 seconds, then relax. Repeat five to 10 times.

Shoulder-blades squeeze. Sit with your feet flat, hands on your hips. Squeeze your shoulder blades together, feeling the stretch in your chest. Hold for 10 seconds, then relax, and repeat five to 10 times.

Chin tuck. Sit with your hands at your sides and feet flat on the floor, and keep your chin level with the floor. Then, pull your chin, head, and neck inward (not down). Hold for 10 seconds, Relax and repeat.