Isabelle Smith

Isabelle Smith is an experienced Sports Dietitian dedicated to helping athletes bridge the gap between hard training and tangible results. With an Honours degree from the University of Newcastle and specialist accreditation through Sports Dietitians Australia (SDA), Isabelle blends high-performance science with a compassionate, athlete-centred approach.

Isabelle’s expertise is sought after at the highest levels of Australian professional sport and tactical performance. Her current roles include:

• Sydney Roosters (NRL): Providing elite performance nutrition support to professional league players.
• Australian Defence Force (HMAS): Guiding trainees through the rigorous nutritional demands of military service.
• University Lecturer: Shaping the next generation of clinicians as a casual lecturer at the University of Newcastle.

Isabelle is a leading voice on the Central Coast for managing complex physiological issues that can sideline an athlete. She specialises in:

• RED-S & Low Energy Availability (LEA): Identifying and reversing the “energy drain” that leads to fatigue, hormonal disruption, and poor performance.
• Bone Stress Injuries: Coordinating nutrition to accelerate bone healing and prevent future stress fractures.
• Disordered Eating & Eating Disorders: Creating a supportive, evidence-based space to build a sustainable and healthy relationship with food.
• Injury Prevention: Strategic fueling to support the body through demanding training blocks and competition seasons.

Having worked extensively with sporting populations across the Newcastle and Central Coast regions, Isabelle understands the local competition landscape. Whether you are a professional player in the NRL system or a local athlete in Erina or Tuggerah looking to fuel more effectively, Isabelle provides the practical tools needed to perform at your best—on and off the field.

Credentials and experience

• Honours degree, University of Newcastle
• SDA specialist accreditation
• Professional sport and tactical performance nutrition experience
• University teaching experience

Frequently Asked Questions

What is RED S, and how do I know if it applies to me?

Relative Energy Deficiency in Sport (RED-S) is a condition that occurs when an athlete’s energy intake is consistently too low to meet the demands of both daily living and training. Signs can include fatigue, injuries, loss of menstrual cycle in women, and poor recovery.

Can Isabelle help with bone stress injuries?

Yes. Isabelle can implement nutrition strategies that play a key role in preventing and managing BSI by ensuring athletes are meeting their nutrient needs to support bone health and recovery.

Do I need to be an elite athlete to book?

No. Isabelle supports anyone training hard or struggling with recovery, energy, and fuelling consistency.

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