What is meant by the statement the promotion of those meals by well known athletes is an ironic combination that sends mixed messages about diet and health?

The statement suggests that when well-known athletes promote certain meals, it creates a contradiction between their healthy, fit image and the nutritional quality of the foods being advertised. This irony arises because these athletes, who are seen as role models for health and fitness, may endorse products that do not align with a balanced diet or optimal health practices. Consequently, it sends mixed messages to the public about what constitutes a healthy lifestyle, potentially leading to confusion about dietary choices.