Coaches.
Seaton Humphreys is an experienced youth development coach, now in his 14th year of practice, specialising in junior athletic development and youth-specific rehabilitation. He graduated with a Bachelor of exercise science from the University of Western Sydney in 2013 and is currently completing a Master of Physiotherapy at the University of Canberra, combing applied coaching coaching with sport science and clinical training. His post-graduate research in biomechanics at CSU and UTS assessed wearable technology and its role in return-to-play interventions, embedded with the NSW Waratahs and Sydney Swans AFL program respectively.
Founder of Athlete Origin, Seaton has previously held performance and sport science roles in semi-professional rugby, including Head of Performance at Gordon Rugby (Shute Shield) and Sport Scientist at Manly Marlins (Shute Shield). His coaching applies evidence-based programs junior-specific testing, growth-stage injury management, and long-term athlete development for juniors aged 10 to 18.
Since opening in 2020, Athlete Origin has trained over 300+ junior athletes, with more than 80 progressing to National and State selection, 55+ to Academy Programs, and 8 to senior professional contracts. Most arrived without prior representative selection and were developed to those pathways through the program itself.
Maddisen Sack is an Accredited Exercise Physiologist specialising in junior athlete development, rehabilitation and the physiological demands of the female developing athlete. She holds a Bachelor of Exercise Physiology and Rehabilitation, combining clinical training with applied junior coaching.
Currently a Youth Development Coach and Athlete Origin Data and Testing Management Head, Maddisen joined the team as an intern in March 2024 and has since progressed into full coaching and operational leadership. She oversees the facility’s performance testing protocols, quarterly athlete retest schedules, and the termly reports that go to families and external coaches. This data pipeline underpins Athlete Origin’s long-term athlete development model and gives every parent a documented record of their child’s progression.
A qualified Level 1 Sports Training, Maddisen applies exercise physiology and movement education to athletes aged 10 to 18, with a particular focus on the female developing athlete: menstrual cycle considerations for training load, ACL and knee injury risk mitigation, bone health, and interventions during developmental shifts that too often impact female sports participation. She brings a personal playing background spanning Netball, Softball, Rugby League, Oztag, League Tag, Basketball, Muay Thain and Broomball.
Lincoln Blissett is an Accredited Exercise Physiologist and strength and conditioning coach with over 10 years’ experience in junior sports development and five years in clinical rehabilitation practice across youth and ageing populations. He holds a Bachelor of Exercise Physiology and Rehabilitation and is currently completing a Master of Strength and Conditioning at Edith Cowan University, combining clinical training with applied strength and conditioning across rehabilitation and performance.
Currently a Youth Development Coach and Accredited Exercise Physiologist at Athlete Origin, Lincoln specialises in guiding field and court-sport athletes through every stage of return to play, from initial rehabilitation to full competitive performance: rebuilding physical capacity, restoring confidence, developing decision-making under fatigue, and re-establishing overall athletic capability. He is also Dry Needling Level 2 qualified. His clinical background across both youth and ageing populations gives him rare depth of long-term movement context, applying the same principles of durability, load management, and progressive capacity-building whether an athlete is at the start of their career or maintaining decades of active life.His coaching philosophy is that a strong coach-athlete relationship is the vehicle that drives development, allowing an athlete to give and receive honest feedback, understand why they’re doing what they’re doing, and gradually take on more responsibility for their own training.
Lincoln’s playing background spans Touch, Rugby League, and Middle Distance Running, bringing both team-sport and endurance perspectives to his work with developing athletes.