どのようにしてカロリーを得ることができますか？

Question

私はペース、時間、マイル、体重を持っています。どうすればカロリーを手に入れることができますか？ ここにコードがあります。ここで

seconds += 1 
     let (h,m,s) = secondsToHoursMinutesSeconds(seconds: Int(seconds)) 
     let secondsQuantity = HKQuantity(unit: HKUnit.second(), doubleValue: Double(s)) 
     let minutesQuantity = HKQuantity(unit: HKUnit.minute(), doubleValue: Double(m)) 
     let hoursQuantity = HKQuantity(unit: HKUnit.hour(), doubleValue: Double(h)) 
     displayTimeLabel.text = ""+hoursQuantity.description+" "+minutesQuantity.description+" "+secondsQuantity.description 
     let distanceQuantity = HKQuantity(unit: HKUnit.meter(), doubleValue: distance) 
     milesLbl.text = "" + distanceQuantity.description  
     paceLbl.text = ""+String((instantPace*3.6*10).rounded()/10)+" km/h"//"Pace: "+String((distance/seconds*3.6*10).rounded()/10)+" km/h" 
    let kg = 75 
     caloriesLbl.text = ??? 

Answer 1

は、私はJavaから変換したサンプルコードでexampleそれは身体活動の大要によって敷設の原則に従います。 ほとんどのエクササイズアプリケーションは、これらのアルゴリズムを使用して、代謝活動を計算します。

typedef NS_ENUM(NSUInteger, Gender){ 
    Male, 
    Felmale 
}; 

    /** 
* Calculated the energy expenditure for an activity. Adapted from the following website https://sites.google.com/site/compendiumofphysicalactivities/corrected-mets 
* 
* @param height    The height in metres. 
* @param age     The date of birth. 
* @param weight    The weight of the user. 
* @param gender    The gender of the user. 
* @param durationInSeconds The duration of the activity in seconds. 
* @param stepsTaken   The steps taken. 
* @param strideLengthInMetres The stride length of the user 
* @return The number of calories burnt (kCal) 
*/ 
- (float)calculateEnergyExpenditureWith:(float) height DOB:(NSDate*) dateOfBirth Weight:(float) weight Gender:(int)gender DurationInSecs:(int) durationInSeconds StepsTaken:(int) stepsTaken StrideLengthInMeters:(float)strideLengthInMetres 
{ 

    float ageCalculated = [self getAgeFromDateOfBirth:dateOfBirth]; 

    float harrisBenedictRmR = [self 
           convertKilocaloriesToMlKmin:[self 
                  harrisBenedictRmrWithGender:gender 
                        WeigthKg:weight 
                         Age:ageCalculated 
                        HeightCm:[self convertMetresToCentimetre:height] 
                  ] WeigthInKg:weight]; 

    float kmTravelled = [self calculateDistanceTravelledInKM:stepsTaken EntityStrideLength:strideLengthInMetres]; 
    float hours = durationInSeconds/(3600.0); 
    float speedInMph = (kmTravelled/1000.0)/hours; 
    float metValue = [self getMetForActivity:speedInMph]; 

    float constant = 3.5f; 

    float correctedMets = metValue * (constant/harrisBenedictRmR); 

    return correctedMets * hours * weight; 
} 


/** 
* Gets a users age from a date. Only takes into account years. 
* 
* @param age The date of birth. 
* @return The age in years. 
*/ 
- (float) getAgeFromDateOfBirth:(NSDate*) dateOfBirth { 
    NSCalendar *calendar = [NSCalendar currentCalendar]; 
    unsigned unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay; 
    NSDateComponents *dateComponentsNow = [calendar components:unitFlags fromDate:[NSDate date]]; 
    NSDateComponents *dateComponentsBirth = [calendar components:unitFlags fromDate:dateOfBirth]; 

    if (([dateComponentsNow month] < [dateComponentsBirth month]) || 
     (([dateComponentsNow month] == [dateComponentsBirth month]) && ([dateComponentsNow day] < [dateComponentsBirth day]))) { 
     return [dateComponentsNow year] - [dateComponentsBirth year] - 1; 
    } else { 
     return [dateComponentsNow year] - [dateComponentsBirth year]; 
    } 
} 

- (float) convertKilocaloriesToMlKmin:(float)kilocalories WeigthInKg:(float)weightKgs 
{ 
    float kcalMin = kilocalories/1440.0; 
    kcalMin /= 5; 

    return ((kcalMin/(weightKgs)) * 1000.0); 
} 

-(float)convertMetresToCentimetre:(float) metres{ 
    return metres * 100; 
} 

- (float) calculateDistanceTravelledInKM:(int)stepsTaken EntityStrideLength:(float) entityStrideLength 
{ 
    return (((float) stepsTaken * entityStrideLength)/1000); 
} 


/** 
* Gets the MET value for an activity. Based on https://sites.google.com/site/compendiumofphysicalactivities/Activity-Categories/walking . 
* 
* @param speedInMph The speed in miles per hour 
* @return The met value. 
*/ 

- (float) getMetForActivity:(float) speedInMph 
{ 
    if (speedInMph < 2.0) { 
     return 2.0f; 
    } else if (speedInMph == 2.0f) { 
     return 2.8f; 
    } else if (speedInMph > 2.0f && speedInMph <= 2.7f) { 
     return 3.0f; 
    } else if (speedInMph > 2.8f && speedInMph <= 3.3f) { 
     return 3.5f; 
    } else if (speedInMph > 3.4f && speedInMph <= 3.5f) { 
     return 4.3f; 
    } else if (speedInMph > 3.5f && speedInMph <= 4.0f) { 
     return 5.0f; 
    } else if (speedInMph > 4.0f && speedInMph <= 4.5f) { 
     return 7.0f; 
    } else if (speedInMph > 4.5f && speedInMph <= 5.0f) { 
     return 8.3f; 
    } else if (speedInMph > 5.0f) { 
     return 9.8f; 
    } 
    return 0; 
} 

/** 
* Calculates the Harris Benedict RMR value for an entity. Based on above calculation for Com 
* 
* @param gender Users gender. 
* @param weightKg Weight in Kg. 
* @param age  Age in years. 
* @param heightCm Height in CM. 
* @return Harris benedictRMR value. 
*/ 
- (float) harrisBenedictRmrWithGender:(Gender) gender WeigthKg:(float) weightKg Age:(float) age HeightCm:(float)heightCm { 
    if (gender == Felmale) { 
     return 655.0955f + (1.8496f * heightCm) + (9.5634f * weightKg) - (4.6756f * age); 
    } else { 
     return 66.4730f + (5.0033f * heightCm) + (13.7516f * weightKg) - (6.7550f * age); 
    } 

}