Female Endurance Bundle

Know what you’re measuring

Every marker, explained.

Total Testosterone, Estradiol, Progesterone, Cortisol, DHEA-S, Vitamin D, Albumin, AST, ALT, GGT, Total Bilirubin, Fasting Glucose, HbA1c, Fasting Insulin, HOMA-IR, LDL, HDL, Triglycerides, VLDL, ApoA1, ApoB, Iron, UIBC, Ferritin, Transferrin Saturation, Fatty Liver Index, Hepatic Steatosis Index, AST:ALT Ratio, TSH, Free T3, Free T4, TPO Antibodies.

Counts follow the store. Profiles and calculated estimates are labeled separately from individual blood measurements.

Baseline · Build · Follow-up

Make testing part of your season.

This is a planning framework for a 12–16-week build. Your results and symptoms determine whether you need an earlier check.

How often should you retest?

• Iron statusHigher-risk endurance athletes may benefit from quarterly iron screening. Following prescribed oral iron treatment, a repeat around 8–12 weeks can assess response; earlier follow-up may be needed for anemia or symptoms. AIS: iron screening and follow-up ↗
• Vitamin DWhen treating deficiency, 8–12 weeks can be useful for selected patients. Routine repeat testing is not needed for everyone taking a maintenance supplement. Vitamin D: monitoring treatment response ↗
• ThyroidUse symptoms and previous results to set follow-up. TSH commonly takes about 6–8 weeks to reassess after a thyroid medication dose change. This is not a universal lifestyle-retest schedule; TPO antibodies usually do not need serial monitoring. American Thyroid Association: thyroid tests ↗
• Cycle-related hormonesCompare the same cycle phase. A clinician may repeat testing in a subsequent cycle; persistent missing periods deserve assessment now, rather than waiting for a quarterly check. ASRM: cycle timing and progesterone ↗
• Average blood sugarAllow roughly three months to assess a longer-term HbA1c trend. It cannot show whether yesterday’s fueling was enough. NIDDK: HbA1c and the three-month view ↗
• CortisolThere is no validated routine retest interval for measuring training recovery. Agree on the clinical question and repeat at a comparable time of day if advised. MedlinePlus: cortisol testing ↗

New or persistent symptoms deserve assessment between scheduled tests. There is no universal quarterly requirement for every marker.

A result worth comparing

Before you collect.

• Follow your kit instructionsUse the collection and fasting instructions supplied with your kit. Drink water normally; do not arrive dehydrated or deliberately overhydrate.
• Record your contextNote collection time, recent training, illness, sleep, medications and supplements. Do not stop prescribed medication without advice.
• Choose a representative dayFor a resting comparison, avoid collecting immediately after a race, hard workout, overnight travel or while acutely ill. Wait until sleep and hydration are back to your usual pattern.
• Keep the days before iron testing easyAIS recommends low to moderate activity in the prior 24 hours and avoiding muscle-damaging exercise for 2–3 days. Follow the kit’s fasting instructions.
• Tell your clinician about muscle sorenessAST and ALT can remain elevated for a week or more after unusual muscle-damaging exercise. A fixed 48-hour gap does not guarantee a resting baseline.
• Check biotin supplementsBiotin can interfere with thyroid assays. Ask the lab how long to pause your particular dose before collection; do not assume every supplement needs the same hold.

Turn results into a next step.