Our Endurance subscription is specifically designed for those taking part in sports such as triathlon, cycling and long distance running. This tracking profile brings together a set of biomarkers that allows athletes to optimise their training, covering aspects of 02 capacity, immune function, fatigue, recovery and markers for over-training. Results will help you to identify possible causes for dips in performance, giving insight into when to reduce activity level or improve nutritional intake.

This tracking profile is ideal for those who are looking to optimise their performance or for those who simply want to ensure their body’s key endurance markers are all in the right place to help them cross the finish line.  

Test cost:
per test
Test type: finger prick
This a subscription package and you will receive a new test kit at the duration of your choice (every 1, 2, or 3 months). Subscription can be paused or cancelled online at any time.
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Estimated turnaround
2 days
From receipt of sample

Key benefits when using Forth’s tracking service

Fast & accurate

Fast & accurate analysis from accredited laboratory


Tests can be done at home


Secure access to online results

Online dashboard

Online dashboard which tracks results over time

Included in this test


Tested biomarkers
  • White Blood Cell Count (WBC)
  • Red Blood Cell (RBC)
  • Mean Corpuscular Volume (MCV)
  • Mean Cell Haemoglobin (MCH)
  • Haemoglobin
  • Haematocrit (HCT)


Tested biomarkers
  • hs-CRP


Tested biomarkers
  • Urea
  • eGFR
  • Creatinine


Tested biomarkers
  • Thyroid Stimulating Hormone (TSH)
  • Testosterone (total)
  • Cortisol (9am)


Tested biomarkers
  • Creatine Kinase

Vitamins & minerals

Tested biomarkers
  • Vitamin D (25 OH)
  • Sodium
  • Folate (serum)
  • Ferritin
  • Chloride
  • Active B12

How it works

Collect sample

We will send you a finger prick kit to use at home

Post sample

Pop your sample in the post to us using a pre-paid envelope

Online results

View your results on your secure personal health dashboard


See how a simple test can improve your performance...

Carrying a lot of fatigue around, it got to the point where I needed answers. I'd put off getting regular blood tests before as the long-winded process of a GP visit followed by a referral, hospital queues and then an extended wait, meant by the time you received your results, they were yesterday's news. 

Forth Edge has changed all that. The process is very quick and very easy, with thorough, well-explained results delivered to your inbox within 24 hours. The Endurance Test gave me definitive answers as to what was going on inside. It's the perfect monitoring tool that takes away a lot of guesswork.

Alice Hector, Pro long distance triathlete and 70.3 champion


As a working mum, I often find myself training ‘tired’ as the demands of day-to-life take their toll. Forth Edge has enabled me to gain a valuable insight into what is happening 'under the surface’, so it is possible for me to adapt my training and lifestyle to get the very most out of each and every race.

Kate Allan, Time TrIal Cyclist & Finley’s Mum


Other tests to consider
Test cost: £114.00 per test

Estimated turnaround 2 days From receipt of sample

Test type: finger prick

Add to basket