How can I comfortably sit back while riding a bicycle?

To sit comfortably while riding a bicycle, make sure your seat is adjusted to the right height and angle. Keep your back straight and shoulders relaxed. Use your core muscles to support your posture and distribute your weight evenly on the seat. Adjust your handlebars to a comfortable position and avoid leaning too far forward or backward. Practice good posture and make small adjustments as needed to find the most comfortable riding position.