Book excerpt: This fitness journal does much more than just help you keep track of and log your workouts. It teaches you the fundamentals of exercise and diet according to current scientific research. It is also your coach for a 90-day fitness plan. In just 90 days, you will build new, long-lasting habits to promote your health, fitness, and positive mood. The book includes: (1) Detailed fitness and diet information to help you understand your body and how to achieve fitness results that last. (2) Customizable, undated exercise journal entries with space to record cardio, strength training, workout goals, reps, sets, weight, meals, nutritional intake, and much more. (3) Record hours of nightly sleep, stretching, self-massage, meditation, breathing exercises, number of daily steps, flights climbed, hours standing, VO2 max, heart rate variability, blood pressure, skinfold measures, hip and waist circumference, and more. (4) The logs were designed to be compatible with the types of assessments made by smart phones, smart watches, and other electronic fitness trackers. (5) Step-by-step worksheets guide you in calculating your RMR, BMI, exercising heart rate targets, weight targets, your calorie, protein, and fats needs, and more. (6) Worksheets to record a large number of standard exercise tests and assessments.