Fitness & Nutrition

Fitness & Nutrition

Expert fitness coach and sports nutritionist skill. Two data sources plus offline calculators — everything a gym-goer needs in one place.

Data sources (all free, no pip dependencies):

• wger (https://wger.de/api/v2/) — open exercise database, 690+ exercises with muscles, equipment, images. Public endpoints need zero authentication.
• USDA FoodData Central (https://api.nal.usda.gov/fdc/v1/) — US government nutrition database, 380,000+ foods. DEMO_KEY works instantly; free signup for higher limits.

Offline calculators (pure stdlib Python):

• BMI, TDEE (Mifflin-St Jeor), one-rep max (Epley/Brzycki/Lombardi), macro splits, body fat % (US Navy method)

When to Use

Trigger this skill when the user asks about:

• Exercises, workouts, gym routines, muscle groups, workout splits
• Food macros, calories, protein content, meal planning, calorie counting
• Body composition: BMI, body fat, TDEE, caloric surplus/deficit
• One-rep max estimates, training percentages, progressive overload
• Macro ratios for cutting, bulking, or maintenance

Procedure

Exercise Lookup (wger API)

All wger public endpoints return JSON and require no auth. Always add format=json and language=2 (English) to exercise queries.

Step 1 — Identify what the user wants:

• By muscle → use /api/v2/exercise/?muscles={id}&language=2&status=2&format=json
• By category → use /api/v2/exercise/?category={id}&language=2&status=2&format=json
• By equipment → use /api/v2/exercise/?equipment={id}&language=2&status=2&format=json
• By name → use /api/v2/exercise/search/?term={query}&language=english&format=json