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Analysis of BMI, BFP, BFM, LBM, BMR, IBW and HR for Child and Adult.
BMI (Body Mass Index)
The body mass index (BMI) or Quetelet index is a value derived from the mass (weight) and height of an individual. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of weight/height2 both Metric and US/Imperial System.
Formula: BMI: weight(lb) * 703 / (height(inch))2
BFP (Body Fat Percentage)
body fat percentage (BFP) of a human or other living being is the total mass of fat divided by total body mass, times 100; body fat includes essential body fat and storage body fat. The percentage of essential body fat for women is greater than that for men, due to the demands of childbearing and other hormonal functions. The percentage of essential fat is 2–5% in men, and 10–13% in women. Storage body fat consists of fat accumulation in adipose tissue, part which protects internal organs in the chest and abdomen. Below derivation is formed by Deurenberg and his co-workers.
Formula:
Adult BFP: (1.20 x BMI) + (0.23 x age) - (10.8 x sex) - 5.4
Child BFP: (1.51 x BMI) - (0.70 x age) - (3.6 x sex) + 1.4
Note: In case of the BMI estimation formula, sex is 1 for males and 0 for females.
LBM (Lean Body Mass)
Lean body mass is a component of body composition, calculated by subtracting body fat weight from total body weight: total body weight is lean plus fat. In equations:
LBM = BW – BF
Lean body mass equals body weight minus body fat,
LBM + BF = BW
Lean body mass plus body fat equals body weight.
Our system is following here is James Method.
Formula:
Male: 1.1 × weight(kg) - 128 × (weight(kg)/height(cm))2
Female: 1.07 × weight(kg) - 148 × (weight(kg)/height(cm))2
BMR (Basal Metabolic Rate
Your BMR (Basal Metabolic Rate) is an estimate of how many calories you'd burn if you were to do nothing but rest for 24 hours. It represents the minimum amount of energy needed to keep your body functioning, including breathing and keeping your heart beating. For precise result we are using Harris-Benedict Equation below for both adult male and female.
Formula:
Step1:
Male: 66 + (6.2 × weight(lb)) + (12.7 × height(inch)) – (6.76 × age)
Female: 655.1 + (4.35 × weight(lb)) + (4.7 × height(inch)) - (4.7 × age))
Step2:
a) Little to no exercise: Daily kilocalories needed = BMR x 1.2
b) Light exercise (1–3 days per week): Daily kilocalories needed = BMR x 1.375
c) Moderate exercise (3–5 days per week): Daily kilocalories needed = BMR x 1.55
d) Heavy exercise (6–7 days per week): Daily kilocalories needed = BMR x 1.725
e) Heavy exercise (6–7 days per week): Daily kilocalories needed = BMR x 1.725
IBW (Ideal Body Weight
To determine how much you should weigh (your ideal body weight) several factors should be considered, including age, muscle-fat ratio, height, sex, and bone density. Some health professionals suggest that calculating your Body Mass Index (BMI) is the best way to decide whether your body weight is ideal. We are following Hamwi Method for adult and Theron Formula for child.
Formula:
Male weight(lb): 106 lbs for the first 5 feet + 6 lbs for each additional inches.
Female weight(lb): 100 lbs for the first 5 feet + 5 lbs for each additional inches.
Child weight(kg): exp((0.175571 x age) + 2.197099)
Heart Rate
Heart rate is the speed of the heartbeat measured by the number of contractions of the heart per minute (bpm). Activities that can provoke change include physical exercise, sleep, anxiety, stress, illness, and ingestion of drugs. Several studies, as well as expert consensus, indicate that the normal resting adult human heart rate is probably a range between 50 and 90 bpm, though the American Heart Association states the normal resting adult human heart rate is 60–100 bpm. Based on Gellish Method and Gulati Method, below equations are for male and female adult.
Formula:
MHR:
Male HRmax: 203.7 / (1 + exp(0.033 × (age − 104.3)))
Female HRmax: 206 − (0.88 × age)
THR:
From [65% Intensity: (220 − age) × 0.65] To [85% Intensity: (220 − age) × 0.85]
Last updated on Nov 27, 2018
Minor bug fixes and improvements. Install or update to the newest version to check it out!
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Rudy
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Body Index
1.0.6 by www.bytefinder.net
Nov 27, 2018