Skip to content

Check your thyroid function for just £40 - today only!

Endurance Fitness Blood Test

Endurance Fitness Blood Test


A blood test for endurance athletes of every level who want to optimise their performance and recovery. Includes tests for anaemia, hormones, muscle health and inflammation.
Blood sample 50 biomarkers included Results estimated in 3 working days from sample receipt at lab
Endurance Fitness Blood Test
Endurance Fitness Blood Test
Endurance Fitness Blood Test
Endurance Fitness Blood Test

Is it for you?

Do you participate in endurance sports and want to be in peak condition for race day? Are you coping with your training load or are you finding injury and long recovery times are holding you back? Are you concerned about the effect of your training on your hormone levels? If you want a thorough health check which focuses on the biomarkers that can impact your sports performance, then this is the right test for you.

What's included?

Biomarker profiles

  • Hormones
  • Proteins
  • Liver Health
  • Cholesterol Status
  • Kidney Health
  • Diabetes
  • Iron Status
  • Thyroid Hormones
  • Clotting Status
  • Red Blood Cells
  • White Blood Cells
  • Adrenal Hormones
  • Vitamins
  • Minerals
  • Muscle Health
  • Inflammation

Hormones (3 Biomarkers)

Proteins (3 Biomarkers)

Liver Health (4 Biomarkers)

Cholesterol Status (6 Biomarkers)

Kidney Health (3 Biomarkers)

Diabetes (1 Biomarker)

Iron Status (4 Biomarkers)

Thyroid Hormones (2 Biomarkers)

Clotting Status (2 Biomarkers)

Red Blood Cells (7 Biomarkers)

White Blood Cells (6 Biomarkers)

Adrenal Hormones (2 Biomarkers)

Vitamins (3 Biomarkers)

Minerals (2 Biomarkers)

Muscle Health (1 Biomarker)

Inflammation (1 Biomarker)

Special instructions

Prepare for your Endurance Fitness Blood Test by following these instructions. Please take your sample before 10am. If you have an unusual sleep pattern (eg shift worker) then take this test within 2 hours of waking. Take this test when any symptoms of short-term illness have settled. Avoid heavy exercise for 48 hours beforehand. Avoid fatty foods for eight hours before your test, you do not need to fast. Take this test two to five days after the start of your period, ideally on day three. It can be taken any time if you do not have periods. Hormonal contraception can affect the results of this test. Taking a break from this and waiting for your periods to restart before your blood test will give more accurate results. Corticosteroid medication can affect this test, ask your doctor whether to stop before testing. Avoid taking your sample from a finger used to apply hormone gels/pessaries/patches in the past 4 weeks. Use gloves to apply these. You should take this test before you take any medication or vitamin/mineral supplements. Do not take biotin supplements for two days before this test, discuss this with your doctor if it is prescribed. Do not take vitamin B12 for two weeks prior to this test. If your B12 is prescribed ask your doctor whether to stop.

From the expert

This advanced profile for endurance athletes covers all the bases, looking at markers which can help identify overtraining and injury as well as those that could cause lack of energy and motivation. This test is for runners, triathletes and cyclists as well as anyone undertaking an endurance challenge which requires them to be on top of their game. Use this test to establish your pre-training baseline and then track changes as your training load increases.

One of the most important tests for endurance athletes is a full blood count which looks in detail at red blood cells and their ability to transport oxygen around the body. This profile includes a full blood count as well as tests for inflammation and muscle damage, cholesterol for cardiovascular risk, hormones which can be affected by training such as testosterone, oestradiol and cortisol as well as markers for fatigue such as a full iron profile and vitamin B12.

Although this test can be taken as a snap-shot on a single day, it is designed to be tracked over time so that you can learn about what works for you.

Dr Sam Rodgers MBBS, MRCGP
Chief Medical Officer

Why take this test?

  • You want to optimise your race performance
  • You want to avoid injury and maximise recovery
  • You want a detailed look at hormones and nutrition that affect performance
  • You want a comprehensive test for general health

Laboratories you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our UKAS accredited partner laboratories.

Dr Sam Rodgers - Chief Medical Officer

Expert advice with your results

Get trusted advice and comments from one of our doctors based on your results.

Your personal health centre

Your personal health centre

Discover the easy way to track your health through our online portal, View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help
Questions? Let us help

Questions? Let us help

Our customer care team is on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.


Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.