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
delivery:
Online through our interactive study portal
Course start:
Enrol anytime
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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.
Why Choose Onfit?
- Guidance from our Highly Qualified Training Team
- Access to Nationally Accredited Industry-Approved Training
- Convenient On-Demand Access to Your Learning Materials
- Regular Check-Ins Throughout Your Study Journey
- Post-Study Employment Advice and Support
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
Career pathways with a Certificate III in Fitness
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
Certification
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 the SIS30321 – Certificate III in Fitness, which qualifies you as a Gym Instructor and Group Exercise Instructor.
Onfit Training College is a Registered Training Organisation (RTO 32107), so you can feel confident that your qualification meets the highest industry and training standards.
Why study with Onfit?
Flexible, Quality Online Courses
Extensive Support from our Expert Team
Industry Relevant Theoretical Knowledge
In-Demand Fitness Business Skills
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
COURSE DETAILS
SIS30321 Certificate III in Fitness
Throughout your studies, you’ll work through 8 Learning Topics in the following order and build practical knowledge and confidence in a range of subject areas relating to your role as a Gym and Group Exercise Instructor:| TOPIC 1 – FITNESS FOUNDATIONS Introduction into how the body works, movement and direction terms, how to find reliable info on anatomy and exercise, how to choose the right exercises for different people, and a first look at coaching techniques. |
| SISFFIT047 Use anatomy and physiology knowledge to support safe and effective exercise |
| TOPIC 2 – HEALTH & FITNESS ASSESSMENTS Introduction into the complaints handling process, client screening fundamentals, how to spot health risks, take basic body and health measurements, set goals, run fitness assessments, know when to refer to other health pros, and give advice on exercise programs. |
| SISFFIT032 Complete pre-exercise screening and service orientation SISFFIT033 Complete client fitness assessments BSBOPS304 Deliver and monitor a service to customers BSBOPS305 Process customer complaints |
| TOPIC 3 – INDIVIDUAL PROGRAMMING & EXERCISE Key components of health and fitness, plan for personalised exercise sessions, choose the right types of exercises, build gym and personalised-based programs, coach clients one-on-one, monitor and modify sessions to keep clients on track. |
| SISFFIT040 Develop and instruct gym-based exercise programs for individual clients |
| TOPIC 4 – HEALTHY NUTRITION Fundamentals of the Australian Dietary Guidelines, understand the roles of Allied Health Professionals and how to refer clients with risk factors, learn how to gather nutrition info from clients, and give simple, safe nutrition advice that stays within your role as a fitness professional. |
| SISFFIT052 Provide healthy eating information |
| TOPIC 5 – GROUP PROGRAMMING & EXERCISE Plan for group exercise sessions, key types of group exercise programs, group program writing fundamentals, coaching skills, evaluate and modify group exercise sessions to cater for participants with risk factors. |
| SISFFIT035 Plan group exercise sessions SISFFIT036 Instruct group exercise sessions |
| TOPIC 6 – WORKPLACE ESSENTIALS Understand safe work practices, how to report incidents, emergency response, hazard identification and risk assessment, work in a fitness team and contribute toward workplace goals, manage personal work priorities, professional development, ongoing learning and self-reflection. |
| HLTWHS001 Participate in workplace health and safety BSBPEF301 Organise personal work priorities BSBXTW301 Work in a team |
| TOPIC 7 – SALES ESSENTIALS Establish the needs, preferences and expectations of your potential clients, promote personal training products and services, overcome objections and facilitate successful sales presentations to fitness clients. |
| SIRXSLS001 Sell to the retail customer |
| TOPIC 8 – FIRST AID & CPR First Aid and CPR units are completed through an external provider of your choice, at an additional cost. You must provide Onfit with a copy of your Statement of Attainment so we can Credit Transfer these units to your Qualification. |
| HLTAID009 Provide cardiopulmonary resuscitation HLTAID011 Provide First Aid |
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.
Our Certificates are assessed using a competency-based approach. That means you’ll show us you’ve got the knowledge and skills needed for each unit at your own pace and in the way that best supports your progress and completion.
You’ll complete a mix of theory and practical assessments throughout the course, with plenty of guidance and support along the way.
Here’s what to expect:
Theory Assessment
Online Quizzes: Quick, multiple-choice quizzes on key topics—automatically marked in your learner portal for instant feedback.
E-Tasks: Written tasks like case studies, reflections, and research activities—completed and submitted online.
Written Templates: Easy-to-use Onfit templates for tasks like screening forms, nutrition reviews, and fitness programs—just fill them in and upload.
Practical Assessment
At Onfit, we make practical assessments flexible and stress-free—so you can focus on becoming a confident fitness professional. You can choose the path that suits you:
Industry Placement + Video Submission
- Gain hands-on experience in a real fitness setting. Industry Placement helps you:
- Apply your skills in real scenarios
- Get expert feedback from fitness professionals
- Build industry connections—and often job offers
- Discover the client groups you’re most passionate about
By choosing industry placement, you’ll complete fewer video submissions while gaining real-world experience that sets you up for success in your fitness career.
Video Submission
If placement isn’t practical for you, we offer a full video assessment option, where you record yourself delivering sessions at home, in a park, or at a gym.
Depending on your approach, you’ll submit approximately 6 to 18 videos per qualification. No matter which option you choose, our team is with you every step— guiding you through placement or helping you film your videos with confidence. At Onfit, you’re never on your own.
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.
Learn how Onfit will prepare you for a
successful fitness career!
What our students say...
Super easy to follow study layout, the team is quick to respond to questions and queries regarding support highly recommend.
Caeley Borowiec
Certificate III in Fitness
Tanisha from Onfit College has given me the upmost best support and has never given up on me. I struggle A LOT with studying and staying focused but she gives me the time and space where I feel comfortable to do everything on my own time and ask questions when I’m unsure. Couldn’t recommend her enough. Appreciate the team.
Lilly-Ann Russell
Certificate III & IV in Fitness
Have recently started with Onfit and it has been great, super easy to work with and they have tailored to my busy work schedule as I am working full time and still studying!! Couldn’t recommend enough