Swim stronger, run faster, ride further
When you train hard across three disciplines, fueling and recovery is critical. The better you know your body, the better you will perform


Triathlon Male
Identify what your body needs to perform at its best with biomarkers tailored to the male endurance athlete
Triathlon Female
Train smarter and safer with insights into your recovery, key nutrients and hormone health
You train hard to excel across three different sporting disciplines, but it can take a toll on your body
Finding the balance between efficient training, effective nutrition and all-important rest - the three pillars of successful athletic performance - can be difficult.
The insight Forth Edge gives you into your body and how it works means you can tailor and adapt your training as your season progresses to make sure it’s getting what it needs to give you the competitive edge. And it can all be done quickly, regularly and from the comfort of your own home.
What biomarkers are important for triathletes?
Triathlon puts an intense training load on athletes, so finding the balance between productive training and overstressing the body, when gains drop off and damage is possible, is critical.
Biomarkers like creatine kinase and cortisol can indicate muscle damage and stress. Micronutrient levels like active B12 and ferritin can inform diet planning to ensure your body is getting what it needs, whilst changes in hormones give insight into whether you’ve got the balance right between training load and nutritional intake. These and others can build up a clear picture of your health helping you to perform at your best.


How often should I test?
To get the best possible picture of how your body works, you need to identify your own unique biomarker profile. The clearer this picture is, the easier it becomes to chart how changes to your diet or training plan affect performance and recovery
Regular testing will establish a baseline, and will allow you to compare not only how your biomarkers match up to other athletes of a similar age and gender, but also against your own ‘normal’ levels so changes are easier to spot.
Forth Edge recommends testing every 3 months throughout the year, during race season and off-season, to really get to know your body.
How Forth Edge works
Order your test
Choose a test to suit your sport or design your own bespoke profile.
Take your sample
A safe, easy-to-use kit makes taking your sample at home simple and convenient.
View your results
View your results on your app and learn more about how biomarkers affect your performance.
Watch our short video to see how our test kit works
Your personal sports-science team, in your pocket

Sample at home and get your results quickly
The easy-to-use Forth Edge test kit allows you to collect the sample at home and post it directly to our accredited laboratories. Processing and analysis takes only two days, and our unique app interface lets you see your results at a glance, or dive deeper for more insight into what each marker means for you, your training and racing.
Expert advice and analysis
Our team of sports medicine experts will analyse your unique biomarker profile, interpreting the results and providing evidence-based advice so you feel empowered to optimise your health and performance.


Your biomarker data when you need it
Using cutting-edge technology we’ve developed an app and interface that puts you in control of your biomarker profile, and with regular testing you can build up an accurate picture of how your body responds to training. Whether you’re monitoring across a season, recovering from injury or keen to train sustainably, Forth Edge can help you make the most of your hard work.
Science-based knowledge to help you train smarter
Safe and simple at-home sample collection
Our easy-to-use kits make collecting your sample and sending it to our labs quick and convenient.
World-class facilities, accurate results
Our accredited labs use the latest analytical technology and techniques to process your sample, giving accurate and insightful results in only two days
Expert sports science advice, tailored to you
The Forth Edge medical team consists of world-leading experts in their fields, including nutrition, endocrinology and sample analysis techniques. They interpret your readings to provide advice that’s specific to you.
The information you need at your fingertips
A user-friendly app that displays all the key biomarker data you need for your sport, compared against the average user for your age and gender set
Discover your unique biological profile
Test regularly, and you’ll get to know your body like never before. You’ll understand what it needs, and how to train and race sustainably while optimising your performance.

Taking the best to new heights
We work with professional athletes and fitness enthusiasts to help them reach new levels of performance
Simone Mitchell
“I use Forth Edge to monitor my wellbeing, body stress levels and make sure my biomarkers are as they should be throughout the year. My key focus is to ensure my body’s recovery is continually monitored to prevent injuries and to ensure I am performing at my very best. I know that with regular biomarking testing with Forth Edge I have left no stone unturned and can fully commit to delivering my very best performance in training and at races”
- 2019 IRONMAN WALES PRO WINNER
Harry Tanfield
“I find the information about my blood values at different points in the season very valuable; it helps me guide my training and monitor the training load. Equally my nutritionist, coach and gym coach use this information to better enable them to direct my training. It’s a complete team effort and Forth Edge makes this possible. Plus the test is super quick and easy.”
- 2018 BRITISH NATIONAL TRACK CHAMPION, INDIVIDUAL PURSUIT
Tom Evans
“As a professional athlete I need to ensure that I’m looking after my body throughout the year. Being an ultra runner, my training volume is high (225km average per week) and it’s essential to stay healthy. This is where Forth Edge has helped me; my first test showed that my iron levels were low and I have now been able to improve them which has really helped my performance. It’s an essential part of my training and racing as an endurance athlete!”
- 3RD AT 2018 ULTRA MARATHON WORLD CHAMPIONSHIPS
Our ambassadors work with us to improve our products and services so all Forth customers get the edge they need
Triathlon Male
Identify what your body needs to perform at its best with biomarkers tailored to the male endurance athlete
Triathlon Female
Train smarter and safer with insights into your recovery, key nutrients and hormone health