It seems there may be a typo in your question, particularly with the term "four form" and "boulevard." However, interpreting your question, it sounds like Sahara is at the gym and her trainer notices something about her, possibly related to her exercise technique or form.
If Sahara is using poor form (which I assume was meant by "four form") while exercising, it is likely that she could be at risk of injury or not getting the most out of her workout. It's important to maintain proper form during any exercise to ensure effectiveness and safety.
As for "boulevard," if this refers to a type of exercise (like running or cycling outdoors on a boulevard), it might simply mean that she is applying similar workouts in different environments.
If you could clarify the wording or provide more context, I could offer a more accurate response!