Specialist Registered Dietitian in Belfast Supporting Gut Health, Weight Loss & Hormonal Health

Sports Nutrition Performance Programme

Woman exercising in a fitness studio during a group training session

Take your fitness and performance to the next level with a personalised nutrition plan designed specifically for you.

Whether you are new to structured training or a seasoned athlete, our specialist registered dietitians create tailored nutrition strategies aligned with your exercise routine, lifestyle, taste preferences, cooking skills, and budget.

This programme supports:

  • Body fat reduction
  • Peak performance
  • Recovery optimisation
  • Long-term athletic health

We work in partnership with NI fitness trainers to ensure your nutrition strategy complements your training demands.

Please note: any medical concerns or conditions impacting nutritional advice may incur additional charges depending on time required.

What's Included

  • 1-Hour Consultation – Review your current diet lifestyle and performance goals.
  • Body Composition Assessment – Including weight, body fat, and key measurements.
  • 7-Day Food Diary & Questionnaire – Completed via our Practice Better portal.
  • Personalised Nutrition Plan – Bespoke guidance, recipes, shopping list, and structured menu plan.
  • Follow-Up Appointment – Monitor progress and optimise your strategy.
  • Ongoing Support & Resources – Practical tools to help you implement sustainable change.

This structured, evidence-based approach ensures your nutrition plan supports both performance outcomes and long-term wellbeing.

Our results speak for themselves: One recent achievement we are delighted about….

Top cyclist, Declan Mulholland, who participated in the Youth Olympics in Holland attended Gillian Killiner in her Belfast Diet Clinic. Following a 121 Dietitian bespoke sports eating plan to shift excess percentage body fat and weight said:

“As a racing cyclist, power-to-weight ratio determines my ability to win events. In order to improve my cycling efficiency and lose weight while maintaining lean muscle I worked with 121 Dietitian to reach optimum weight for my events. Gillian provided me with concise, accurate and practical advice enabling me to represent my country at Youth Olympic level and become a multiple National Cycling Champion.”

Book our sports nutrition performance programme today to see the wonderful changes you can make.