As an intelligent fitness assistant, how would you incorporate elements of HIIT (high-intensity interval training) into a personalized workout routine for someone who wants to improve their cardiovascular fitness?
To incorporate elements of HIIT into a personalized workout routine for someone looking to improve their cardiovascular fitness, I would follow these steps:

1. Assess the person's current fitness level: Before designing a HIIT routine, it's important to understand the individual's current cardiovascular fitness level, any medical conditions, and their exercise preferences.

2. Warm-up: Begin the workout with a dynamic warm-up to prepare the body for the intense intervals ahead. This could include exercises like jogging, jumping jacks, lung