Final answer:
The statement is true; ISSA professionals need to understand their clients individually before making tailored recommendations for better and sustainable results.
Step-by-step explanation:
The statement is true. As aspiring ISSA (International Sports Sciences Association) professionals, it is crucial to understand clients on an individual level before crafting personalized recommendations. This approach ensures that the fitness or nutrition plans address the client's unique goals, medical history, lifestyle, and preferences. Understanding the client thoroughly can lead to more effective and sustainable results, as the program will be tailored to align with the client's needs and capabilities.