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Grip Strength Ratio API

Compute relative grip strength and return longevity-oriented strength classification.

Endpoint

  • GET /api/v1/fitness/grip-strength-ratio
  • POST /api/v1/fitness/grip-strength-ratio/post

Parameters

Name Type Required In Description
grip_strength_kg number Yes Query/Body Combined max grip strength in kg.
body_weight_kg number Yes Query/Body Body weight in kg.
age integer Yes Query/Body User age.
gender string Yes Query/Body male or female.
lang string No Query Response language (en,fr,es,de,pt,ja,hi,ar,bn,gu,id,it,ko,mr,nl,pa,pl,ro,ru,ta,te,th,tr,ur,vi,zh).

Request Example

curl -X GET "https://api.hefitapi.com/api/v1/fitness/grip-strength-ratio?grip_strength_kg=82&body_weight_kg=78&age=45&gender=male&lang=en" \
  -H "X-API-Key: YOUR_API_KEY"

Response Example

{
  "grip_strength_kg": 82.0,
  "body_weight_kg": 78.0,
  "age": 45,
  "gender": "male",
  "relative_strength_index": 1.05,
  "percentile_estimate": 75,
  "strength_category": "strong",
  "strength_category_label": "Strong grip profile",
  "summary": "Relative grip strength is favorable for age and body weight.",
  "recommendations": [],
  "language": "en",
  "_api_metadata_": {"endpoint_name": "grip_strength_ratio", "response_language": "en"}
}

Localization

This endpoint reads health_fitness_grip_strength_ratio.json from the supported language catalogs.