Simple markers can show us “check engine” alerts. A most basic and accessible way to see if you have a reasonable level of metabolic health is by checking five markers that are almost always tested and tracked at your annual checkup: blood sugar, triglycerides, high-density lipoprotein (HDL) cholesterol, blood pressure, and waist circumference. When these markers fall into an optimal range, in the absence of medication — see Chapter 4 for exact specifications — you can deduce that your cellular energy production is doing OK. Typically, you will feel vibrant, healthy, and pain-free. These feelings, too, should tell you that your body has Good Energy, the foundation of general good health.

GOOD ENERGY BIOMARKERS AND MOVEMENT When you’re striving to be part of the 6.8 percent of metabolically healthy Americans, regular movement will help you get there. Research shows that exercise improves all five of the following basic biomarkers of metabolism: Glucose Levels Above 100 mg/dL: Twelve-week exercise programs of either high-intensity running (40 minutes per week) or low-intensity running (150 minutes per week) both brought participants’ blood sugar from the prediabetic range (100 mg/dL or greater) to the nondiabetic range (<100 mg/dL). HDL Cholesterol Less Than 40 mg/dL: A 2019 review of the literature showed that exercise increased HDL cholesterol, “with exercise volume, rather than intensity, having a greater influence.” Meanwhile, “raising HDL levels pharmacologically has not shown convincing clinical benefits.” Triglycerides Above 150 mg/dL: Numerous studies have demonstrated that physical activity effectively lowers triglyceride levels. In a 2019 study, an eight-week moderate aerobic exercise program significantly reduced triglyceride levels in participants. Furthermore, even a single session of intense aerobic exercise has been found to decrease triglyceride levels the following day. This positive effect could be due to the increased activity of hepatic lipase in the liver, an enzyme that facilitates the absorption of triglyceride from the bloodstream. Blood Pressure of 130/85 mmHg or Higher: Research has shown the effects of exercise among populations with high blood pressure were similar to the effects of commonly used medications. A Waistline of More Than 35 Inches for Women and 40 Inches for Men: Not surprisingly, regular exercise can help decrease obesity by increasing energy expenditure and promoting weight loss. Research shows a clear inverse relationship between the amount of movement people do each week and the size of their waistline: more movement, smaller waist circumference. What’s more, lower activity (fewer than 5,100 steps per day)

Keep It Simple With food, we covered three simple rules that get you quite far: don’t eat added sugar, don’t eat industrially processed vegetable and seed oils, and don’t eat highly processed grains. With fitness, I also suggest three simple rules. Walk at least 7,000 steps per day and space these steps out throughout the day. Work up to 10,000 per day. Get your heart rate above 60 percent of your maximum for at least 150 minutes a week. (That’s 30 minutes, five days a week.) Lift heavy things multiple times per week in a way that hits every major muscle group.