Core Viewpoint - The increasing demand for integrated fitness services that combine exercise and nutrition guidance is reshaping the role of personal trainers, highlighting the need for enhanced nutritional knowledge among fitness professionals [1][5][26]. Group 1: Demand for Nutritional Guidance - There is a growing trend among fitness members seeking nutritional advice, driven by an increase in health awareness and various dietary concepts such as high-protein diets and intermittent fasting [1][5]. - Personal trainers are often viewed as the primary source of nutritional information by their clients, despite their limited qualifications to provide comprehensive dietary guidance [3][6][19]. - A survey indicated that 43.5% of personal trainers recognize the increasing demand for nutrition-related knowledge [15]. Group 2: Limitations of Personal Trainers - Personal trainers can supervise basic dietary habits but are not qualified to diagnose or treat eating disorders or create detailed meal plans [5][19]. - The role of personal trainers is evolving, but they still face restrictions in providing specific nutritional advice, especially for clients with chronic health issues [19][26]. - The complexity of modern dietary questions, such as the effects of low-carb or ketogenic diets, often exceeds the expertise of typical personal trainers [6][19]. Group 3: Professional Development and Market Trends - The fitness industry is witnessing a shift towards more specialized training services, with personal trainers increasingly focusing on health coaching that encompasses nutrition, sleep quality, and mental health [17][26]. - The market is pushing for personal trainers to enhance their nutritional skills, with many considering certification as nutrition coaches to meet client needs [24][26]. - Companies like Keep and薄荷健康 are expanding into the nutrition sector, offering meal replacements and health foods, indicating a trend where fitness and nutrition are becoming more intertwined [28][30].