Research suggests that even short daily meditation sessions produce measurable benefits. Studies from Carnegie Mellon University found that just 25 minutes of mindfulness meditation for three consecutive days reduced psychological stress. Most teachers recommend starting with 5 to 10 minutes daily and building gradually toward 20 to 30 minutes. Consistency matters far more than duration — 10 minutes every day produces greater results than 60 minutes once a week. The most important principle for beginners is to make the session short enough that you always feel willing to do it again tomorrow.

Reference:

Wikipedia: Meditation

https://en.wikipedia.org/wiki/Meditation