Work Physiology Analysis
These tools help analyze human physiological responses to work, including energy expenditure, metabolic rates, and cardiovascular workload.
Energy Expenditure Calculation
Calculate total energy expenditure for work activities based on metabolic equivalents (METs) or oxygen consumption.
Energy Expenditure Results
Total Energy Expenditure: kcal
Average Energy Expenditure Rate: kcal/min
MET Reference Values
| Activity | MET Range |
|---|---|
| Resting (sitting quietly) | 1.0-1.3 |
| Light office work | 1.5-2.0 |
| Walking (3.2 km/h) | 2.5-3.0 |
| Moderate manual work | 4.0-6.0 |
| Heavy manual work | 6.0-8.0 |
| Very heavy work (shoveling) | 8.0-10.0 |
Metabolic Rate (M) Calculation
Calculate the metabolic rate (M) in watts or kcal/min based on oxygen consumption or work output.
Metabolic Rate Results
Metabolic Rate (M):
Equivalent:
Metabolic Rate Reference Values
| Activity Level | Metabolic Rate (W) |
|---|---|
| Resting (basal metabolic rate) | 80-100 |
| Sedentary work | 100-150 |
| Light work | 150-250 |
| Moderate work | 250-400 |
| Heavy work | 400-600 |
| Very heavy work | 600-1000 |
Heart Rate & Workload (Astrand-Ryhming)
Estimate VO₂max and workload capacity based on submaximal heart rate response using the Astrand-Ryhming nomogram method.
Cardiovascular Results
Estimated VO₂max: ml/kg/min
Age-Corrected VO₂max: ml/kg/min
Fitness Classification:
In a full implementation, this would show the graphical nomogram with plotted values
Fitness Classification by VO₂max
| Classification | Male (ml/kg/min) | Female (ml/kg/min) |
|---|---|---|
| Excellent | >52 | >46 |
| Good | 46-52 | 40-46 |
| Average | 40-46 | 34-40 |
| Fair | 34-40 | 28-34 |
| Poor | <34 | <28 |
Practical Examples
Example 1: Office Work Energy Expenditure
70 kg person, 2.0 MET office work for 8 hours (480 min)
Energy = 70 kg × 2.0 kcal/kg/hr × 8 hr = 1,120 kcal
Example 2: Manual Labor Metabolic Rate
VO₂ = 25 ml/kg/min for 80 kg worker
M = (25 × 80 × 0.005) × 60 = 600 kcal/hr = 418 W
Example 3: Astrand-Ryhming Test
30-year-old female, 150 W workload, HR = 150 bpm
Estimated VO₂max ≈ 42 ml/kg/min (Good fitness)