Kickstart your fitness career with our Certificate III in Fitness


Course Title & Code:

SIS30321 –
Certificate III in Fitness

Career Outcomes

Gym Instructor, Group Exercise Instructor


Online through our interactive study portal

Course start:

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Get qualified with Onfit Training College

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Get Better Technical Skills.

Our state-of-the-art online training portal has been designed to aid fast, enjoyable learning. Study in your own time, at your own pace.
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7-Day support.

Our expert team of Tutors, Career Advisors, Admin & IT support staff are here to guide you through your course and are passionate about helping you succeed!
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Nationally Accredited.

The SIS30321 Certificate III in Fitness is a Nationally Accredited Qualification, giving you peace of mind and credibility as you launch your fitness career.

Certificate III in Fitness course overview

Launch your new career with the SIS30321– Certificate III in Fitness.

This is an entry-level qualification and is the first step in launching your career in the fitness industry.

You’ll learn:

  • Principles of anatomy and physiology
  • Health and pre-exercise screening
  • Program writing and exercise instruction
  • Communication and business skills to work within the fitness industry
Certificate III in Fitness course overview

Career pathways with a Certificate III in Fitness

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As a Gym Instructor, you can work in a range of gym facilities from studios to large gym chains, where you’ll:

  • Supervise gym members
  • Prescribe programs to clients
  • Maintain the gym equipment
  • Provide excellent customer service to members

Group fitness classes are a popular offering for many gyms, so being a skills and qualified instructor will keep you in-demand with clients & employers alike. As a Group Exercise Instructor, you’ll:

  • Be a group exercise leader, motivating and instructing your group
  • Deliver classes indoors (e.g. within gyms and community centres)
  • Guide your group with safe instruction and easy to follow cues
  • Cater your classes to different community groups
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To become a Gym Instructor or Group Exercise Instructor in Australia the minimum educational requirement is the Certificate III in Fitness.

Upon successful completion of your course you’ll be awarded with the SIS30321 – Certificate III in Fitness.

As a Registered Training Organisation delivering this Nationally Recognised Qualification you can feel assured that your training and certification with Onfit is of a high standard and meets industry and government requirements, so you can start your career as a Gym Instructor and Group Exercise Instructor with confidence!

Why study with Onfit?

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Flexible, Quality Online Courses

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Extensive Support from our Expert Team

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Industry Relevant Theoretical Knowledge

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In-Demand Fitness Business Skills

Study certificate III in Fitness course

Making study easier & more enjoyable

  • All course resources provided (no textbooks needed)
  • Relevant and up-to-date lesson content, filled with videos & interactive features to keep you engaged
  • Fit your studies around your schedule with self-paced delivery and no set due dates
  • Be supported by our Circle of Support, 7 days a week



Deliver and monitor a service to customers


Organise personal work priorities


Participate in workplace health and safety


Complete pre-exercise screening and service orientation


Complete client fitness assessments


Plan group exercise sessions


Instruct group exercise sessions


Develop and instruct gym-based exercise programs for individual clients


Use anatomy and physiology knowledge to support safe and effective exercise


Provide healthy eating information


Address the needs of people with chronic disease


Recognise healthy body systems


Apply infection prevention and control procedures to own work activities


Plan and conduct recreation programs for older persons


Provide First Aid*

* this unit of competency is not included in the course and needs to be completed through an accredited provider at an additional cost

This course is designed for people who don’t have any previous qualifications in fitness. As an entry-level qualification, there are no entry requirements for the Certificate III in Fitness.

To receive your Certificate III in Fitness you will need to complete the unit HLTAID011 Provide First Aid and provide Onfit Training College a copy of your Statement of Attainment prior to completing your course.

You’ll have a maximum 12-month course duration for your Certificate III in Fitness studies.

With Onfit Training College’s flexible, self-paced study, you can move through your course at your own pace and complete as quickly as you’d like.

We recommend allocating between 4 – 8 hours of study time per week, to keep on track with your timeline. We provide a helpful study planner to help you plan your studies and reach your study goals.

You’ll have the flexibility to complete your Theory & Practical Assessment, when it suits you, whether you’re balancing studies with work, family or other passions, our courses are designed to fit in with your lifestyle.

With online course access 24/7, you can complete your lessons & assessments at your own pace.

  • Theory Assessment

Your Theory Assessment will include Multiple Choice Quizzes, Short Answer Quizzes & Case Studies, which can all be completed online.

  • Practical Assessment 

Your Practical Assessment involves Practical Assessment Role Plays to help ensure you’re prepared for your work placement and career. These can be submitted via film or can be completed by attending a practical assessment session in Brisbane. 

  • Work Placement (optional)

Highly beneficial if you want to get the most out of your studies, work placement lets you ‘walk the talk’ and live the life of a fitness professional while still studying!  Perfect for students starting out, or keen to get started quickly in the industry.  As many of our students are offered positions while on placement, Onfit remains highly supportive of this optional extra.

Note: For students enrolled in the previous training package course (SIS30315 Certificate III in Fitness), work placement is a requirement (min 30 hrs).

Get started with our low deposit Payment Plans, or you can choose our Cash Advantage option that gives you added savings.

No matter your situation, our friendly Career Advisors can talk you through our fees and payment options and help you get started and studying in no time!

We’re committed to delivering excellence and value to our students and pride ourselves on our high-quality courses, offered at a great price.

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