Final answer:
The incorrect statement about Health Coaching is that a Health Coach only focuses on nutrition. Health coaching is a more holistic pursuit, covering various areas of wellness such as stress management and lifestyle habits, in addition to nutrition.
Step-by-step explanation:
The statement that is not true of Health Coaching is C) A Health Coach is someone who just coaches on nutrition. This statement is incorrect because health coaching encompasses a holistic approach to wellness, which includes but is not limited to nutrition. Health coaches may also address other aspects such as physical activity, stress management, and overall lifestyle changes.
In contrast, statements A) Your best client is the one that's already investing with you, B) Your clients can only grow as big as you are, and D) Knowledge does not equal behavior change are typically associated with coaching philosophies or business strategies in Health Coaching. Statement D is particularly significant in demonstrating a health coach's understanding that imparting knowledge is not enough to ensure a client will change their behavior; there must also be motivation, planning, and support.