Final answer:
The Lifestyle and health-history questionnaire is the best form to be completed by a client before an initial session as it offers a comprehensive insight into the client's health and medical history.
Step-by-step explanation:
Before the initial session with a client, it may be BEST to ask the client to complete a Lifestyle and health-history questionnaire. This form provides crucial information regarding the client's past and current health status, habits, lifestyle choices, and medical history.
The data gleaned from this questionnaire can guide the development of a tailored, safe, and effective health or fitness program. While a Readiness to change questionnaire and Food intake questionnaire have their uses, the comprehensive nature of a health-history questionnaire typically makes it the most informative starting point.
The PAR-Q+ (Physical Activity Readiness Questionnaire) is also important, especially for identifying risks related to physical activity, but the health history offers broader insights that are essential for initial client assessment.