La base de ejerciciosque tu app fitnessrealmente quería.

{
  "id": "0001",
  "name": "3/4 Sit-up",
  "bodyPart": "Waist",
  "target": "Abs",
  "equipment": "Body Weight",
  "category": "strength",
  "difficulty": "beginner",
  "mechanic": "isolation",
  "force": "push",
  "met": 3.5,
  "averageCaloriesPerMinute": 4.3,
  "averageCaloriesPerHour": 258,
  "secondaryMuscles": [
    "Hip Flexors",
    "Lower Back"
  ],
  "instructions": [
    "Lie flat on your back with your knees bent and feet flat on the ground.",
    "Place your hands behind your head with your elbows pointing outwards.",
    "Engage your abs and curl forward to a 45° torso angle.",
    "Pause at the top, then slowly lower back to start.",
    "Repeat for the desired number of repetitions."
  ],
  "_links": {
    "self": {
      "href": "/v1/exercises/0001"
    },
    "related": {
      "href": "/v1/exercises/0001/related"
    },
    "calories": {
      "href": "/v1/exercises/0001/calories{?bodyweightKg,minutes}",
      "templated": true
    },
    "marketplacePreview": {
      "href": "/marketplace/preview/0001.gif"
    }
  }
}