This unit describes the performance outcomes, knowledge and skills required to plan group exercise sessions designed for participation by mixed ability groups, or by groups that predominately comprise a particular profile, for example, older people. It requires the ability to account for the participation of individuals from specific population groups and of diverse abilities and allow for modifications that can be made during instruction.It covers skills for evaluating and improving sessions in response to participant and instructor feedback, noting that sessions might be delivered by self or others. Skills for instructing group exercise sessions are covered in a complementary unit.Exercise sessions are diverse in nature. They could combine or specifically concentrate on cardiovascular, resistance and flexibility exercises, and be delivered with or without music.This unit applies to group fitness instructors and personal trainers who use discretion and judgment when planning sessions to meet diverse participant needs. Instructors practise in settings such as fitness facilities, gyms, leisure and community centres, client workplaces and other locations, depending on their role.The skills in this unit must be applied in accordance with Commonwealth and State or Territory legislation, Australian standards and industry codes of practice.No occupational licensing, certification or specific legislative requirements apply to this unit at the time of publication.