Free Tools
Free tools built on the research behind my articles and on my own clinical experience as a physician. Each tool shows its sources and links to the articles it is based on. None of them diagnoses, interprets your own results or replaces an assessment by your doctor.
Blood tests
Did Exercise Affect My Blood Test?
Enter the date of your last hard effort and of your blood test, and see which results may have been influenced by the exercise.
Athlete Blood Test Reference Ranges
Standard lab ranges side by side with ranges reported in athletes for CK, ferritin, hematocrit and testosterone.
Iron Panel Pattern Viewer
Ferritin, transferrin saturation, hemoglobin and CRP read together: which pattern described in the research your numbers resemble.
Cholesterol Calculator
Non-HDL cholesterol, estimated LDL and the total/HDL ratio in mmol/L or mg/dL.
Athlete Blood Test Panel Checker
Select the tests in a commercial panel and see which have clear clinical value and which add little.
eGFR Calculator With Notes for Athletes
CKD-EPI 2021 eGFR from creatinine, with the reasons muscle mass and training can mislead it.
Lab Unit Converter
Convert results between mmol/L, µmol/L, mg/dL, ng/mL and more.
Heart and blood pressure
Blood Pressure Category Checker
Your reading under both the American and European guidelines, and why home readings matter.
Heart Rate Zone Calculator
Compare maximum heart rate formulas side by side and calculate five training zones, with Karvonen if you add resting heart rate.
Resting Heart Rate Trend Checker
Enter 7–14 morning readings and compare your recent mornings with your own baseline.
Injuries and pain
Musculoskeletal Pain Treatment Evidence Explorer
For a diagnosis already made by your doctor: what trials show about exercise, physiotherapy, injections and surgery for tennis elbow, frozen shoulder, shoulder impingement, lateral hip pain, runner’s knee, neck pain and more.
Nutrition, supplements and body composition
Body Composition Planner
Fat loss, muscle gain or recomposition: estimated maintenance calories and what research shows about rates, surpluses and protein.
Supplement Evidence Explorer
Creatine, caffeine, iron, vitamin D, collagen, omega-3, magnesium, zinc and more: what the evidence shows for athletes.
Protein and Leucine per Meal
Protein per meal from body weight, and how much whey or soy gives 2–3 g of leucine.
Creatine Loading Timeline
When loading and low-dose protocols typically reach saturation, and the body mass change before a weigh-in.
Recovery and sleep
Sleep Checker for Athletes
Your usual sleep compared with what athletes may need, your weekly sleep gap, and features linked with sleep apnoea.
Combat sports
Weight Cut Calculator
Your planned cut as a percentage of body mass, compared with what combat sports research reports.
Concussion Return-to-Sport Steps
The six-step consensus strategy, red flags, and minimum suspensions after knockouts in boxing frameworks.
More tools are on the way.
