Jason recommends running a 5k or shorter distance to establish a baseline fitness level and determine training paces. He emphasizes the importance of updating paces based on racing performances and perceived effort. Title: Determining Training Paces Topics: Perceived effort, Looking at watch Summary: Jason discusses how to determine training paces based on past race times and perceived effort. He shares his personal experience of glancing at his watch frequently but encourages runners to rely less on their watches during easy runs to avoid becoming too reliant on them.