/fitness namespace · APlicious

Health and fitness API — BMI, calories burned, macro splits and workout plans

Build fitness apps, health dashboards, and workout trackers without building calculators from scratch. Every formula is validated against published research.

20+fitness endpoints

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GET /api/v1/fitness/macro-split

const res = await fetch(
  'https://aplicious.com/api/v1/fitness/macro-split' +
  '?weight_kg=80&height_cm=178&age=30&goal=lose',
  { headers: { 'X-API-Key': 'lapi_live_••••' } }
);
const { data } = await res.json();
// { tdee: 2580, target_calories: 2080,
//   protein_g: 160, carbs_g: 208, fat_g: 58 }

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What's included in /fitness

BMI & body composition

BMI, body fat percentage (Navy, Jackson-Pollock), lean mass, and ideal weight range.

Calorie & macro targets

TDEE, BMR (Mifflin-St Jeor), and macro splits for cut, bulk, or maintenance goals.

Workout recommendations

Exercise library filtered by muscle group, equipment, and difficulty. Returns sets/reps/rest targets.

One-rep max

1RM from any weight × reps combo using Epley, Brzycki, and 4 other formulae simultaneously.

Heart rate zones

5-zone heart rate training targets from age and resting HR. Pairs with wearable data beautifully.

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Frequently asked questions

Which BMR formula do you use?

Mifflin-St Jeor by default — the most validated formula in clinical literature. Pass ?formula=harris-benedict to switch.

Are workouts suitable for beginners?

Yes. Pass ?difficulty=beginner to filter exercises. Each workout endpoint returns detailed form cues.

Can I combine fitness and nutrition endpoints?

Yes — both /fitness and /nutrition namespaces work under the same key and complement each other.

Is there a fasting calculator?

Yes. /wellness/fasting returns your current fasting window status, projected ketosis onset, and optimal eating window.

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