The Primal Blueprint 90-Day Journal

If you always do what you've always done, you'll always get what  you always got. 90 days is enough time to completely improve your life by changing a few habits. But how do you know which new habits are having the greatest effect? You need to keep track of the variables, as you would in any experiment. Best-selling diet and exercise author Mark Sisson offers this unique logbook for tracking every possible detail in your own personal experiment. He shows you how to set up an experiment (lose weight? get stronger? sleep better? conceive a child?) and then talks you through the process of finding what works, or how much it takes, or how long it takes for change to occur. Use the information to move you to new levels of health, fitness and longevity.

Mark Sisson Mark Sisson backs up his bestselling line of Primal Blueprint books and cookbooks with this exceptional personal journal and guidebook for living Primally. As one of the world's leading authorities on evolution-based health and fitness principles, Sisson has been instrumental in bringing a grassroots movement of enthusiasts seeking to reconnect with a simpler, more sensible way of life into the mainstream. Since launching MarksDailyApple.com in 2006, Sisson has garnered attention for slamming conventional wisdom and promoting Primal living; it today receives over 1,500,000 unique visitors per month and has earned a place among the world's top-5 ranked health websites. Mark Sisson, 59, is a former 2:18 marathoner and fourth-place finisher in the Hawaii Ironman World Triathlon Championships. Besides blogging daily, Mark conducts seminars across North America and hosts an annual three-day Primal retreat in California. He lives with his wife, Carrie, and children, Devyn and Kyle, in Malibu, California.