Which stretching technique was most likely introduced in Mr. Trainer's PE class at the beginning of the school year?

Static stretching is most likely to be introduced at the beginning of the school year because it involves slow, controlled movements that safely elongate the muscles without the risk of injury, making it suitable for students who may not yet be familiar with more advanced stretching techniques. This method allows students to ease into flexibility training, ensuring they develop an understanding of body mechanics and the importance of flexibility without the need for prior experience.

As students progress through the school year and become more comfortable with physical education activities, instructors may then introduce other techniques such as PNF or dynamic stretching. PNF stretching, while effective, often requires more knowledge and practice to perform correctly. Similarly, dynamic stretching, which involves more movement and coordination, is usually more suitable for older adolescents who have developed greater body awareness and physical capabilities. Passive stretching also requires a partner, which may not always be feasible in a classroom setting where students are still establishing fundamental skills and comfort levels.