Which of the following is NOT a part of the 'Professional support' principle?

The principle of 'Professional support' emphasizes the importance of providing clients with comprehensive guidance and ensuring their safety throughout the fitness journey. Ignoring client history would go against this principle, as understanding an individual’s background—such as medical conditions, previous injuries, and personal fitness experiences—is crucial for trainers to offer tailored advice and effective programming.

Client history is vital in developing safe and effective fitness plans, allowing trainers to identify any potential risks and to design workouts that maximize benefits while minimizing hazards. The other aspects of professional support, such as ingredient synergy, full disclosure, and safe trials based on history, are all aligned with the holistic and informed approach that trainers should adopt. Each of these elements focuses on maximizing client safety and effectiveness in their fitness pursuits, whereas neglecting client history undermines that very foundation of support and guidance.