Cambridge research reveals just 15-20 minutes of journaling 3-5 times weekly significantly improves mental and physical health. Unlike simple diary-keeping, true journaling involves intentional reflection that processes emotions and promotes growth. Studies show it reduces stress by 28% and intrusive thoughts by nearly 50%. Even 5-minute daily sessions create more benefits than occasional lengthy ones. The key? Consistency and finding the style that works for you. Discover the complete journaling definition →