Whoop blood test: 45 biomarkers for athletes

A wearable shows you how your body behaves: your resting heart rate, your sleep, your recovery score. What it does not measure are the values in your blood underneath. A broad blood panel can add that extra layer of insight.

Think of your iron stores, your hormone balance or signs of inflammation after a heavy training block. These values can help you understand why recovery lags or your energy fluctuates. It remains a snapshot and not a diagnosis, but it gives you and your doctor concrete data to discuss.

This sports blood test may suit people who:

• use a Whoop, heart rate strap or other wearable and want to add blood values to their training data
• train seriously for endurance, strength or a competition and want to record their baseline
• notice that recovery, energy or performance changes without a clear reason
• want preventive insight into how their body functions under load

You do not need to be an elite athlete; even consistent recreational training can make a broad panel like this useful.

This test measures 45 biomarkers, grouped around the areas that may be relevant for active people:

• Metabolism and blood sugar: including fasting glucose, HbA1c, insulin and HOMA-IR.
• Heart and blood vessels: a lipid profile with LDL, HDL and triglycerides, plus ApoB, Lp(a) and homocysteine.
• Hormones: testosterone (total and free), SHBG, cortisol, DHEA-S, estradiol and the thyroid value TSH.
• Iron status: ferritin, iron, transferrin and transferrin saturation.
• Liver and kidneys: including ALT, AST, creatinine and eGFR.
• Inflammation, blood count and vitamin D: CRP, a complete blood count with leukocyte differential and vitamin D.

Minerals and electrolytes are included as well. Read more about ferritin, vitamin D and CRP.

Together, these 45 biomarkers can give you a broader view of how your body responds to training. Your iron and blood values may say something about your oxygen transport and energy, while your hormones and cortisol may relate to recovery and stress.

Your metabolic values can show how your body handles sugars, and markers such as CRP may point to insufficient recovery. This remains data you discuss with a doctor; a number on its own is not a verdict on your fitness.

For this test, blood is drawn at a certified sample point. There are 650+ locations across the Netherlands, which you choose yourself after ordering.

You do not need a referral from your GP: this is a blood test without a referral, where you pick a location and a time that suit you. The draw is done by trained staff and usually takes a few minutes. Unlike a self-test at home, your blood is analysed in a certified lab.

This test can be useful if you want to record your baseline at the start of a training season, or if you notice your recovery, sleep or performance changing while your wearable shows no clear cause.

Around a heavy training block or a stressful period, these values can add extra context. You always interpret the result together with a doctor.

Your result shows each value with a reference range and a short explanation. What counts as a healthy value varies by lab, by person and sometimes by training moment, so a single number says little.

Athletes sometimes have values that fall just outside the standard reference without anything being wrong, such as a temporarily raised CRP after hard exercise. That is why a doctor looks at the whole picture: your values, your symptoms and your context. Only a doctor can properly interpret your result.

For a number of values, such as glucose, insulin and your lipids, it is common to measure while fasting. Plan your blood draw in the morning where possible and avoid eating for eight to twelve hours beforehand.

Try not to do an intensive workout right before your draw, as this can temporarily affect some values. Do you use supplements or medication? Then ask your doctor whether that could influence your measurement.

Your results are available online within a few working days. You see all your blood values, their reference ranges and a clear explanation, which you can place alongside the data from your wearable.

Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.