Endurance InsideTracker refresher test
Cardiorespiratory endurance decreases with age, doubling the risk of death from heart disease after age 50. By keeping your body's engine strong, you strengthen your heart and lungs so you can go longer without stopping.
Want to improve your endurance and perform optimally during sports and daily activities? This comprehensive blood test analyzes key biomarkers that affect oxygen transport, iron stores and energy production so you can optimize your performance and recovery.
What is being tested?
- Ferritin - Measures your body's iron stores; low levels can lead to fatigue and decreased performance.
- Hemoglobin - A protein in red blood cells that transports oxygen to muscles and organs; essential for endurance.
- Platelets (Platelets) - Play a role in wound healing and blood clotting, which is important for recovery after intense exercise.
- Transferrin saturation - Indicates how much iron is effectively used for oxygen transport and energy production.
- TIBC (Total Iron Binding Capacity) - Measures the ability of the blood to bind and transport iron, which is important for performance and recovery.
- Iron (Iron) - Essential mineral for forming hemoglobin and preventing anemia and fatigue.
- Hematocrit - Indicates the percentage of red blood cells in your blood; important for oxygen transport and endurance.
- MPV (Mean Platelet Volume) - Provides insight into platelet size, which affects circulation and recovery.
- Vitamin B12 - Supports red blood cell production and nerve function; deficiency can lead to fatigue and muscle weakness.
- RBC (Red Blood Cell Count) - Measures the number of red blood cells, which carry oxygen to your muscles.
- MCH (Mean Corpuscular Hemoglobin) - Indicates how much hemoglobin is in red blood cells and helps evaluate oxygen transport.
- MCHC (Mean Corpuscular Hemoglobin Concentration) - Measures the concentration of hemoglobin in red blood cells; important for oxygen transport.
- RDW (Red Cell Distribution Width) - Indicates whether there is variation in red blood cell size, which may indicate iron deficiency or anemia.
- MCV (Mean Corpuscular Volume) - Measures the average size of red blood cells and helps detect anemia and iron deficiency.
Do you have the InsideTracker dashboard? Then you can also upload your lab results into the dashboard to monitor your progress.



