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Making healthy choices compatible with the diet 
There are five different plant-based eating patterns: lacto-ovo vegetarian (no meat or fish, consumes eggs and dairy), lacto vegetarian (no eggs, meat, or fish but consumes dairy), flexitarian (consumes fish and meat intermittently), pescatarian (consumes fish), and vegan (completely no foods from animal sources, even honey). Whichever kind of plant-based eater you are, according to David C. Nieman, an expert on athletes and diet studies, director of the Human Performance Laboratory - Appalachian State University, North Carolina, and professor of health and exercise science, “All kinds of diets (including meat-eating diets) are compatible with performance.” The hook though is to make wise and healthy choices that are compatible with the kind of diet you’re following to make your diet work efficiently whether for health or athletic performance. Nieman, a marathon runner and a vegetarian himself adds that while he understands the reasons why many athletes are adopting a plant-based diet, it doesn’t make someone a better athlete. A plant-based diet is going to help only if someone was previously on a high-fat and low-carb diet since moving plant-based will provide more carbohydrates than before. Only then would they see significant improvements in endurance, but not on the level of sports skills. To make a plant-based diet work for an athlete, it must have a strong ground sourced from a variety of fruits and vegetables, nuts, seeds, whole grains, and legumes, says Barbara Lewin, a sports nutritionist.
The three areas of how diets affect athletes
While many top athletes vouch for the benefits of going plant-based, it’s always a case-to-case basis. So, to get a better overall sense of how diets affect athletes, Nieman suggests looking at these three areas: long-term, acute, and post-workout/race/competition recovery. Long-term health is a given, but what you eat every day and during the 3 days before a competition are both incredibly important affecting your health and total performance.