Understand your energy. Change your weight.
Welcome to Eivi, the new service from Tony Martin, the theoretical physiologist and brainchild behind Limbo, which helped thousands of people successfully lose weight.
Eivi is the next-generation service, using the latest technology and scientific understanding about metabolism, that will help you understand and change your energy and weight.
Ready to understand and change in 2026?
About Tony Martin
Born and residing in Cork, Ireland, Tony Martin is one of the leading personal trainers in the country, and a pioneering scientist in rethinking nutrition and exercise.
Tony Martin’s main focus for 30 years has been a new model for understanding energy in the body. For over 10 years, he has advocated for a new science of metabolism, centred around blood glucose. He was the first to identify glucose as the ‘governing metric’ of the body’s energy system.
His theory has now been tested and validated by 15,000 people, with astonishing results:
Significant weight loss
More energy
Better sleep
Chronic conditions alleviated
Eivi is for people who want to truly understand their metabolism, weight and health. Are you ready?
About Eivi
Eivi builds on the new understanding of metabolism unlocked by the Limbo project, which ran from 2021 to mid-2025. That service helped thousands of members lose weight using Tony Martin’s methodology, plus technology and personalised coaching.
But while Limbo overextended to many countries, Eivi will focus only on Ireland. Irish members will, when accepted into the program, join a community of other people locally, and get direct access to sessions with Tony Martin.
How it works
The full service — Eivi Elite — uses CGMs (continuous glucose monitors), plus smart scales and trackers – watches, bands, rings – to give you an inside look at your energy and metabolism.
Our starter service — Eivi Core — with no hardware or wearables needed, gives you metabolism coaching, to start the journey of understanding your weight and body.
Pricing
Eivi Core
€20 / month
Online membership, with:
Private member space
Education materials
Weekly live training sessions
Weekly Q&A sessions to learn your metabolism
Coaching sessions led by Tony Martin
Eivi Elite
€200 / month
Includes everything in Core, plus:
2 CGMs each month for 24-7 metabolism tracking
Individual feedback on meals and workouts
Inner Circle access to Tony Martin
Join the waitlist
Eivi is now accepting applications for both the Core and Elite programmes, to commence in 2026.