Sports Nutrition & Fueling Lab — know your energy, macros, race fueling, hydration, and recovery, with the formula behind every number.
Start — build the client profile
Enter the client once. The tool reads the profile and recommends which assessment modules to run — so you work one intelligent assessment that assembles around the client, rather than picking through separate worksheets.
Quick-load an athlete — Travis (endurance / marathon), Emily (tennis · injury & recovery), or Sarah (distance runner · RED-s) — or enter your own.
Client profile
• Concerns / findings
Populates age, sex, weight, height, diet, and sport in the modules so you never re-enter them, and pins a case banner across the top.
Guided: you don't need carb, protein, or body-fat numbers ready — answer a few scenario questions and the worksheet recommends an evidence-based range, then asks you to choose and justify the value.
Case Assessment — clinical context & intake
The worksheet handles the numbers. This layer adds the reasoning around them: who the client is, what life stage they're in, and what their actual intake looks like — each piece tagged by how much to trust it.
Worked example — Alex: adult vegetarian presenting with fatigue, muscle weakness, frequent infections, low mood, and paresthesia.
Case snapshot
Phase 1 of the assessment tab. Live now: the life-stage & physiologic-context layer and Cronometer CSV import. Coming next: intake-vs-target comparison, symptom / lab evidence streams, micronutrient reference cards, the supplement-decision gate, and the clinical-reasoning challenge.
Import Cronometer diary (CSV)
Export a day from Cronometer (Diary → Export, or the Pro client export) and drop the CSV here. It's parsed entirely in your browser — nothing is uploaded to a server. Imported values are tagged reported.
or drag & drop · parsed locally, never transmitted
Intake vs. target
Your imported diary against the case reference — the worksheet's calculated energy & macro targets and sex/age DRIs for micronutrients. These are this case's references, not Cronometer's own targets, so a percentage here answers "meets the reference we chose for this client," never "nutrient status is adequate."
Micronutrient references use the Sex set in "Life stage & context" below;
Life stage & context
Evidence streams — symptoms · labs · diet
Three independent streams. A single stream is a prompt to gather more; convergence across streams raises the priority of a nutrient concern. This is screening synthesis — never a standalone diagnosis.
Reported symptoms
Reported labs / biomarkers
Dietary findings auto
Derived from the dietary pattern above and any Cronometer nutrients below reference.
Connections — from finding to cause
Pattern recognition: each reported finding has several possible explanations, and not all are nutritional. Follow the branches, then see which nutrient the whole case converges on.
Clinical priorities — synthesize & commit
The evidence screen can light up several cards at once, but they aren't equally important. Before revealing the tool's synthesis, commit to your own reasoning — then compare.
Medications & supplements — safety screen
Check what the client takes. The screen looks across drug↔nutrient, drug↔supplement, supplement↔supplement, and key food↔drug relationships, using graduated language. This is a teaching safety screen — not a clinical interaction checker: "interaction" and "contraindication" are not synonyms.
Medications
Supplements
Assessment builder — REFLECT
Pull it together in your own words, then have the tool weigh your reasoning against its synthesis. This is the graduate-level move: you commit, it responds.
Missing data & next assessment
What to gather before finalizing — and an explicit split between what a nutrition professional assesses and what needs referral or coordination.
Clinical reasoning map
The whole case on one screen — findings, then what to do, what to confirm, and what to escalate.
Pediatric energy & macros (3–18 y)
Children aren't small adults. This tab uses the IOM DRI pediatric EER equations — which add an energy allowance for growth — and pairs every figure with what it can and can't tell you.
Worked example — Jordan: 12 y, active.
Educational estimate. A pediatric energy target is a starting estimate, not a prescription. In children the real assessment is growth velocity — whether the child tracks their own CDC growth curve over time — not a single equation. Always interpret against growth charts and pediatric references.
Child inputs
Covers ages 3–18. Under 3 needs infant/young-child equations — the results will explain.
Hydration — sweat rate & replacement
Built around this athlete's own sweat loss, not a generic "drink X ounces." Weigh in before and after a session, log fluid taken in, and the tool computes sweat rate, fluid deficit, and a personalized planning range.
Sweat rate isn't one permanent number — it shifts with heat, intensity, and duration. Run it for cool vs hot, easy vs competition.
Menopause — nutrition & bone health
The menopause transition isn't one calculation. This worksheet gathers life-stage context, reported symptoms, and nutrition emphasis, and activates a bone-health assessment when the pattern warrants it.
Symptoms are recorded as reported, never interpreted as nutrient deficiencies — and the tool does not diagnose menopause from symptoms.
Context
1 Activity
2 Nutrition status
3 Reported symptoms
Older adult — nutrition, movement & wellbeing
Not a small adult and not an athlete template. The priorities flip toward protecting muscle, bone, and independence — higher protein, vitamin D and B12, hydration — and, just as important, movement and mealtime wellbeing.
The dominant risk shifts from over- to under-nutrition: screen for unintentional weight loss and low intake, not just excess.
Client
Raises the protein target.
• Screening
Endurance fueling — expert assessment
A rapid, single-screen race-fueling worksheet for professionals: enter the case and move straight to daily carbohydrate, race-day timing, and recovery — with every formula and justification kept visible, so the assessment stays auditable rather than a black box.
Worked example — Travis: 46, male, 150 lb, 5′9″, ~5 h marathon; late-race fatigue with major pace decline and weight loss on long runs; shellfish allergy; CYP1A2 variant.
Plan — assessment summary
The case's findings, assembled into one plan: priority findings, then nutrition, performance, hydration, supplement, monitoring, and referral strategies — each traceable to the evidence that generated it.
Findings flow in from the modules — mainly Case Assessment (symptoms, labs, intake) and the activated context modules. Work a case there, then open the plan.