The Certificate III in Fitness (SIS30321) is your official entry point into the fitness industry. It qualifies you to work as either a Gym Instructor or Group Exercise Instructor—two essential roles in most fitness facilities. Whether you’re looking to support members on the gym floor or lead group classes, Cert III gives you the skills to get started.

1. Gym Instructor

As a Gym Instructor, your role is all about supporting members in a gym setting. With this qualification, you can:

• Conduct fitness assessments and pre-screenings

• Demonstrate safe use of gym equipment

• Deliver pre-designed exercise programs (within your scope)

• Supervise clients while they train

• Provide motivation and basic exercise guidance

You’ll typically find Gym Instructors working in commercial gyms, fitness centres, and leisure facilities. While you’re not qualified to write ongoing personalised programs (that’s Cert IV), you are an important part of a member’s fitness journey.

2. Group Exercise Instructor

Love the energy of a group workout? As a Group Exercise Instructor, you can:

• Plan and lead group fitness sessions (freestyle, circuits, bootcamps, etc.)

• Create a fun and safe environment for participants

• Deliver classes to a wide range of fitness levels

This role is perfect for those who enjoy teaching in a group setting—whether it’s in a gym studio, outdoors, or at a community centre.

Want to Teach Spin, Pilates or Other Specialised Classes?

If your goal is to run specific formats; like Reformer Pilates, Yoga, Spin, Aqua Aerobics, Les Mills, or Zumba—you’ll need additional training or a separate certification for that style.

These may include:

• A certified Reformer Pilates course

• A Cycle/Spin Instructor certificate

• An Aqua Exercise Instructor skill set

• A license for branded programs (e.g. Les Mills or Zumba)
  

Your Certificate III gives you a solid base, but teaching specialised classes safely and effectively requires extra qualifications specific to the format.

What You Can’t Do With Just Certificate III

It’s important to know the limitations too! With a Cert III, you cannot:

• Work as a 1:1 personal trainer

• Design and deliver individualised training plans

• Train clients unsupervised in non-standard environments

If you want to be a Personal Trainer and write programs tailored to individual clients, you’ll need to complete your Certificate IV in Fitness.

Where Can You Work With Cert III?

• Gyms and health clubs

• Council or community fitness centres

• Outdoor group training sessions

• Recreation and leisure centres

You may also find opportunities in school sport programs or supporting roles in women's wellness programs—especially if you continue developing your skills.

Certificate III in Fitness opens doors to two exciting pathways: Gym Instructor and Group Exercise Instructor. You’ll be equipped to guide, motivate, and support clients in structured environments. If you want to go further—whether it’s PT, Pilates, or something more niche—there are plenty of options waiting for you.

Want help figuring out your next step? Reach out to your mentor or course advisor—we’re here to support your journey every step of the way!

If you’re thinking about becoming a qualified personal trainer or group fitness instructor, check out our Certificate III and IV in Fitness. Feel free to reach out if you have any questions