Follow along with this 30-day workout calendar to lose fat, build muscle, and improve your endurance. You’ll be combining high-intensity interval training (HIIT) with brisk walks or jogs to optimize fat-burning while still improving strength and endurance. The routines are perfect for beginners, with simple moves and no fancy equipment. All you need is a timer, a mat, dumbbells, and a bench or chair. This calendar will teach you how to obtain visible results.