Exercise MET Calculator

# MET (Metabolic Equivalent of Task) calorie calculator
# Formula: Calories = MET × weight_kg × duration_hours

MET_VALUES = {
    "running_8kph": 8.0,
    "running_10kph": 10.0,
    "cycling_moderate": 8.0,
    "swimming_moderate": 6.0,
    "walking_5kph": 3.5,
    "weight_training": 3.5,
    "yoga": 2.5,
    "basketball": 6.5,
    "soccer": 7.0,
    "tennis": 7.3,
}

def calories_burned(met: float, weight_kg: float, duration_min: float) -> float:
    """Calculate calories burned from MET, weight, and duration."""
    hours = duration_min / 60
    return met * weight_kg * hours

# Example: 70 kg person running at 10 kph for 30 minutes
weight_kg = 70
duration_min = 30
activity = "running_10kph"
met = MET_VALUES[activity]
calories = calories_burned(met, weight_kg, duration_min)
print(f"Activity: {activity}")
print(f"MET: {met}")
print(f"Calories burned: {calories:.1f} kcal")

# Compare multiple activities at same duration
print("\nCalorie comparison (70 kg, 30 min):")
for name, m in MET_VALUES.items():
    cal = calories_burned(m, weight_kg, duration_min)
    print(f"  {name:25s}: {cal:.0f} kcal")