{
  "schema_version": "0.1",
  "name": "AI Fit Hub Tools",
  "description": "46 performance calculators across nutrition, strength, cardio, body composition, recovery, and planning.",
  "tools": [
    {
      "name": "tdee_calculator",
      "description": "Estimate your daily energy expenditure with Mifflin-St Jeor + activity factors.",
      "url": "https://aifithub.io/tdee-calculator/",
      "inputSchema": {
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          "sex": {
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          "age": {
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          },
          "weight_kg": {
            "type": "integer"
          },
          "height_cm": {
            "type": "integer"
          },
          "activity_level": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "sex",
          "age",
          "weight_kg",
          "height_cm",
          "activity_level"
        ]
      }
    },
    {
      "name": "bmr_calculator",
      "description": "Estimate basal metabolic rate and maintenance calories using Mifflin-St Jeor assumptions.",
      "url": "https://aifithub.io/bmr-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
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          "sex": {
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          "age": {
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          "weight_kg": {
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          "height_cm": {
            "type": "integer"
          },
          "activity_level": {
            "type": "string"
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        },
        "required": [
          "tool",
          "sex",
          "age",
          "weight_kg",
          "height_cm",
          "activity_level"
        ]
      }
    },
    {
      "name": "macro_calculator",
      "description": "Convert calorie targets into protein, carbs, and fat grams for your goal.",
      "url": "https://aifithub.io/macro-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "calories": {
            "type": "integer"
          },
          "protein_pct": {
            "type": "integer"
          },
          "carbs_pct": {
            "type": "integer"
          },
          "fat_pct": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "calories",
          "protein_pct",
          "carbs_pct",
          "fat_pct"
        ]
      }
    },
    {
      "name": "bmi_calculator",
      "description": "Calculate BMI quickly with a plain-language range explanation and limitations.",
      "url": "https://aifithub.io/bmi-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "weight_kg": {
            "type": "integer"
          },
          "height_cm": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "weight_kg",
          "height_cm"
        ]
      }
    },
    {
      "name": "calorie_deficit_calculator",
      "description": "Estimate required daily calorie deficit for a target timeline and bodyweight change.",
      "url": "https://aifithub.io/calorie-deficit-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
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          },
          "current_weight_kg": {
            "type": "integer"
          },
          "target_weight_kg": {
            "type": "integer"
          },
          "weeks": {
            "type": "integer"
          },
          "activity_level": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "current_weight_kg",
          "target_weight_kg",
          "weeks",
          "activity_level"
        ]
      }
    },
    {
      "name": "body_recomposition_planner",
      "description": "Plan body-fat reduction pace, deficit targets, and protein needs around a timeline.",
      "url": "https://aifithub.io/body-recomposition-planner/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "weight_kg": {
            "type": "integer"
          },
          "body_fat_percent": {
            "type": "integer"
          },
          "target_body_fat_percent": {
            "type": "integer"
          },
          "weeks": {
            "type": "integer"
          },
          "resistance_training_days": {
            "type": "integer"
          }
        },
        "required": [
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          "weight_kg",
          "body_fat_percent",
          "target_body_fat_percent",
          "weeks",
          "resistance_training_days"
        ]
      }
    },
    {
      "name": "progressive_overload_planner",
      "description": "Project lifting progression with weekly overload and planned deload cycles.",
      "url": "https://aifithub.io/progressive-overload-planner/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
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          },
          "current_lift_kg": {
            "type": "integer"
          },
          "weekly_increase_percent": {
            "type": "number"
          },
          "training_weeks": {
            "type": "integer"
          },
          "deload_every_weeks": {
            "type": "integer"
          },
          "deload_drop_percent": {
            "type": "integer"
          }
        },
        "required": [
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          "current_lift_kg",
          "weekly_increase_percent",
          "training_weeks",
          "deload_every_weeks",
          "deload_drop_percent"
        ]
      }
    },
    {
      "name": "one_rep_max_calculator",
      "description": "Estimate one-rep max with Epley, Brzycki, and Lombardi formulas.",
      "url": "https://aifithub.io/one-rep-max-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
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          "weight_kg": {
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          },
          "reps": {
            "type": "integer"
          },
          "formula": {
            "type": "string"
          }
        },
        "required": [
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          "weight_kg",
          "reps",
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        ]
      }
    },
    {
      "name": "body_fat_percentage_calculator",
      "description": "Estimate body fat percentage using the U.S. Navy circumference method.",
      "url": "https://aifithub.io/body-fat-percentage-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
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          },
          "sex": {
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          "weight_kg": {
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          },
          "waist_cm": {
            "type": "integer"
          },
          "neck_cm": {
            "type": "integer"
          },
          "height_cm": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "sex",
          "weight_kg",
          "waist_cm",
          "neck_cm",
          "height_cm"
        ]
      }
    },
    {
      "name": "protein_intake_calculator",
      "description": "Get daily protein targets based on training level and goal.",
      "url": "https://aifithub.io/protein-intake-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
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          "weight_kg": {
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          },
          "activity_level": {
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          },
          "goal": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "weight_kg",
          "activity_level",
          "goal"
        ]
      }
    },
    {
      "name": "ideal_weight_calculator",
      "description": "Compare Devine, Robinson, Miller, and Hamwi formulas as a realistic range.",
      "url": "https://aifithub.io/ideal-weight-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
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          },
          "sex": {
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          "height_cm": {
            "type": "integer"
          },
          "frame_size": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "sex",
          "height_cm",
          "frame_size"
        ]
      }
    },
    {
      "name": "running_pace_calculator",
      "description": "Calculate pace per km and mile and project race finish times from one run.",
      "url": "https://aifithub.io/running-pace-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "distance_km": {
            "type": "integer"
          },
          "time_minutes": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "distance_km",
          "time_minutes"
        ]
      }
    },
    {
      "name": "heart_rate_zone_calculator",
      "description": "Calculate personalized training zones with the Karvonen method.",
      "url": "https://aifithub.io/heart-rate-zone-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "age": {
            "type": "integer"
          },
          "resting_hr": {
            "type": "integer"
          },
          "method": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "age",
          "resting_hr",
          "method"
        ]
      }
    },
    {
      "name": "water_intake_calculator",
      "description": "Calculate daily water intake based on weight, activity level, and climate.",
      "url": "https://aifithub.io/water-intake-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "weight_kg": {
            "type": "integer"
          },
          "activity_level": {
            "type": "string"
          },
          "climate": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "weight_kg",
          "activity_level",
          "climate"
        ]
      }
    },
    {
      "name": "waist_to_hip_ratio_calculator",
      "description": "Calculate waist-to-hip ratio and assess body composition using WHO guidelines.",
      "url": "https://aifithub.io/waist-to-hip-ratio-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "waist_cm": {
            "type": "integer"
          },
          "hip_cm": {
            "type": "integer"
          },
          "sex": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "waist_cm",
          "hip_cm",
          "sex"
        ]
      }
    },
    {
      "name": "sleep_calculator",
      "description": "Calculate optimal bed and wake times based on 90-minute sleep cycles.",
      "url": "https://aifithub.io/sleep-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "wake_time": {
            "type": "string"
          },
          "sleep_cycles": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "wake_time",
          "sleep_cycles"
        ]
      }
    },
    {
      "name": "ffmi_calculator",
      "description": "Calculate Fat-Free Mass Index to gauge muscularity and compare against natural benchmarks.",
      "url": "https://aifithub.io/ffmi-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "weight_kg": {
            "type": "integer"
          },
          "height_cm": {
            "type": "integer"
          },
          "body_fat_pct": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "weight_kg",
          "height_cm",
          "body_fat_pct"
        ]
      }
    },
    {
      "name": "vo2_max_estimator",
      "description": "Estimate aerobic capacity with Cooper run, Rockport walk, or no-exercise questionnaire methods.",
      "url": "https://aifithub.io/vo2-max-estimator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "method": {
            "type": "string"
          },
          "age": {
            "type": "integer"
          },
          "sex": {
            "type": "string"
          },
          "weight_kg": {
            "type": "integer"
          },
          "activity_level": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "method",
          "age",
          "sex",
          "weight_kg",
          "activity_level"
        ]
      }
    },
    {
      "name": "strength_standards",
      "description": "Rank your lifts from Beginner to Elite based on bodyweight ratios.",
      "url": "https://aifithub.io/strength-standards-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "body_weight_kg": {
            "type": "integer"
          },
          "sex": {
            "type": "string"
          },
          "bench_kg": {
            "type": "integer"
          },
          "squat_kg": {
            "type": "integer"
          },
          "deadlift_kg": {
            "type": "integer"
          },
          "ohp_kg": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "body_weight_kg",
          "sex",
          "bench_kg",
          "squat_kg",
          "deadlift_kg",
          "ohp_kg"
        ]
      }
    },
    {
      "name": "dots_score_calculator",
      "description": "Compare powerlifting strength across weight classes with IPF DOTS and Wilks-2020 coefficients.",
      "url": "https://aifithub.io/dots-score-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "sex": {
            "type": "string"
          },
          "bodyweight_kg": {
            "type": "integer"
          },
          "total_kg": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "sex",
          "bodyweight_kg",
          "total_kg"
        ]
      }
    },
    {
      "name": "lean_body_mass_calculator",
      "description": "Estimate lean body mass using Boer, James, Hume, and Peters formulas from height and weight.",
      "url": "https://aifithub.io/lean-body-mass-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "sex": {
            "type": "string"
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          "weight_kg": {
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          },
          "height_cm": {
            "type": "integer"
          }
        },
        "required": [
          "tool",
          "sex",
          "weight_kg",
          "height_cm"
        ]
      }
    },
    {
      "name": "walking_calorie_calculator",
      "description": "Estimate calories burned from walking using speed, duration, body weight, and incline.",
      "url": "https://aifithub.io/walking-calorie-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "weight_kg": {
            "type": "integer"
          },
          "speed": {
            "type": "string"
          },
          "duration_minutes": {
            "type": "integer"
          },
          "incline": {
            "type": "string"
          }
        },
        "required": [
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          "speed",
          "duration_minutes",
          "incline"
        ]
      }
    },
    {
      "name": "calories_burned_calculator",
      "description": "Estimate exercise calorie burn from body weight, duration, MET intensity, and incline.",
      "url": "https://aifithub.io/calories-burned-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "weight_kg": {
            "type": "integer"
          },
          "duration_minutes": {
            "type": "integer"
          },
          "activity_met": {
            "type": "number"
          },
          "incline_percent": {
            "type": "integer"
          }
        },
        "required": [
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          "weight_kg",
          "duration_minutes",
          "activity_met",
          "incline_percent"
        ]
      }
    },
    {
      "name": "intermittent_fasting_window_planner",
      "description": "Plan protocol-based eating and fasting windows with a 24-hour timeline and 5:2 day picker.",
      "url": "https://aifithub.io/intermittent-fasting-window-planner/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "protocol": {
            "type": "string"
          },
          "first_meal_time": {
            "type": "string"
          },
          "fast_days": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        "required": [
          "tool",
          "protocol",
          "first_meal_time",
          "fast_days"
        ]
      }
    },
    {
      "name": "meal_macro_split_planner",
      "description": "Convert daily macro targets into per-meal protein, carb, and fat execution numbers.",
      "url": "https://aifithub.io/meal-macro-split-planner/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "daily_calories": {
            "type": "integer"
          },
          "protein_g": {
            "type": "integer"
          },
          "carbs_percent": {
            "type": "integer"
          },
          "meals_per_day": {
            "type": "integer"
          }
        },
        "required": [
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          "daily_calories",
          "protein_g",
          "carbs_percent",
          "meals_per_day"
        ]
      }
    },
    {
      "name": "creatine_intake_calculator",
      "description": "Estimate creatine maintenance and loading doses from body weight and training frequency.",
      "url": "https://aifithub.io/creatine-intake-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "body_weight_kg": {
            "type": "integer"
          },
          "protocol": {
            "type": "string"
          },
          "loading_phase_days": {
            "type": "integer"
          },
          "training_days_per_week": {
            "type": "integer"
          }
        },
        "required": [
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          "body_weight_kg",
          "protocol",
          "loading_phase_days",
          "training_days_per_week"
        ]
      }
    },
    {
      "name": "workout_volume",
      "description": "Calculate total training volume and compare against optimal ranges per muscle group.",
      "url": "https://aifithub.io/workout-volume-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "unit": {
            "type": "string"
          },
          "exercises": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string"
                },
                "muscle_group": {
                  "type": "string"
                },
                "sets": {
                  "type": "integer"
                },
                "reps": {
                  "type": "integer"
                },
                "weight": {
                  "type": "integer"
                }
              },
              "required": [
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              ]
            }
          }
        },
        "required": [
          "tool",
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          "exercises"
        ]
      }
    },
    {
      "name": "food_to_exercise",
      "description": "See how long you need to exercise to burn off any food, personalized by bodyweight.",
      "url": "https://aifithub.io/food-to-exercise-converter/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          },
          "calories": {
            "type": "integer"
          },
          "weight_kg": {
            "type": "integer"
          },
          "food_name": {
            "type": "string"
          }
        },
        "required": [
          "tool",
          "calories",
          "weight_kg",
          "food_name"
        ]
      }
    },
    {
      "name": "resting_heart_rate",
      "description": "Assess cardiovascular fitness from your resting heart rate — classification, cardio age, and improvement targets.",
      "url": "https://aifithub.io/resting-heart-rate-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
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        ]
      }
    },
    {
      "name": "flexibility_score",
      "description": "Estimate your flexibility percentile and rating from a sit-and-reach test score, adjusted for age and sex.",
      "url": "https://aifithub.io/flexibility-score-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "swim_pace_calculator",
      "description": "Calculate swim pace, total time, or distance with SWOLF and effort-zone context.",
      "url": "https://aifithub.io/swim-pace-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "run_training_paces_calculator",
      "description": "Get personalized Easy, Tempo, Threshold, Interval, and Speed training paces from a recent race time using the Daniels VDOT method.",
      "url": "https://aifithub.io/run-training-paces-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "sweat_rate_calculator",
      "description": "Calculate your personal sweat rate from pre/post-exercise weigh-ins and estimate fluid and sodium losses using ACSM guidelines.",
      "url": "https://aifithub.io/sweat-rate-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "race_time_predictor",
      "description": "Predict finish times across 5K, 10K, half marathon, and marathon from any known race result using Riegel's formula.",
      "url": "https://aifithub.io/race-time-predictor/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "cycling_power_ftp_zone_calculator",
      "description": "Calculate your 7 Coggan power training zones from FTP or a 20-minute test result with W/kg ratio.",
      "url": "https://aifithub.io/cycling-power-ftp-zone-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "plate_loading_calculator",
      "description": "Calculate which weight plates to load on each side of a barbell to hit your target weight in kg or lbs.",
      "url": "https://aifithub.io/plate-loading-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "treadmill_pace_converter",
      "description": "Convert treadmill speed to running pace with incline-adjusted flat equivalent, projected race times, and calorie estimates.",
      "url": "https://aifithub.io/treadmill-pace-converter/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "zone_2_heart_rate_calculator",
      "description": "Calculate your Zone 2 heart rate with Maffetone, Karvonen, % Max HR, and lactate threshold methods compared side by side.",
      "url": "https://aifithub.io/zone-2-heart-rate-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "dots_wilks_gl_combined_calculator",
      "description": "Compare DOTS, Wilks, and Goodlift scores side by side to see which system rates your powerlifting total highest.",
      "url": "https://aifithub.io/dots-wilks-gl-combined-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "rpe_to_percentage_converter",
      "description": "Convert RPE and reps to percentage of 1RM with a full interactive RPE chart based on the Tuchscherer table.",
      "url": "https://aifithub.io/rpe-to-percentage-converter/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "strength_percentile_calculator",
      "description": "Find out where your squat, bench, deadlift, or OHP ranks against other lifters by bodyweight and sex.",
      "url": "https://aifithub.io/strength-percentile-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "meet_day_attempt_selector",
      "description": "Plan powerlifting meet attempts with opener, second, and third attempt suggestions based on 1RM and confidence.",
      "url": "https://aifithub.io/meet-day-attempt-selector/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "hybrid_training_planner",
      "description": "Build a weekly schedule that balances running and lifting with interference warnings and recovery guidance.",
      "url": "https://aifithub.io/hybrid-training-planner/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "sleep_debt_calculator",
      "description": "Track 7 nights of sleep to calculate accumulated sleep debt with a recovery timeline and quality assessment.",
      "url": "https://aifithub.io/sleep-debt-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "macro_cycling_calculator",
      "description": "Calculate different macros for training days and rest days with carb cycling for recomp, lean bulk, or cut goals.",
      "url": "https://aifithub.io/macro-cycling-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    },
    {
      "name": "muscle_gain_potential_calculator",
      "description": "Estimate your natural muscular potential with the Casey Butt model and see how close you are to your genetic limit.",
      "url": "https://aifithub.io/muscle-gain-potential-calculator/",
      "inputSchema": {
        "type": "object",
        "properties": {
          "tool": {
            "type": "string"
          }
        },
        "required": [
          "tool"
        ]
      }
    }
  ],
  "disclaimer": "General fitness estimates — not medical advice.",
  "creator": {
    "@type": "Organization",
    "name": "Orbyd",
    "url": "https://orbyd.app"
  }
}