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Measures: Maksimal aerobik kapasite (VO₂ maks), kardiyovasküler dayanıklılık
Difficulty: Orta | Category: Aerobik
Protocol
The Balke Treadmill Protocol, developed by Bruno Balke, is an exercise test protocol based on constant speed with gradual increases in incline. Its slower progression compared to the Bruce protocol makes it more suitable for sedentary individuals and clinical populations.
Preparation: The treadmill speed is fixed at 5.3 km/h (men) or 4.8 km/h (women). The participant warms up by walking for 5 minutes. A heart rate monitor and blood pressure cuff (if needed) are attached.
Protocol: The test begins at 0% grade for the first minute. Grade is increased by 1% each subsequent minute. Speed remains constant; only incline changes. The participant continues until they can no longer maintain the required pace. The test ends at maximal effort or when termination criteria are met.
Termination Criteria: RPE >18, heart rate exceeding 90% of maximum, and unsafe symptoms (chest pain, dizziness) are indicators for test termination.
Calculation: VO₂max (ml/kg/min) for men = 1.444 × T + 14.99; for women = 1.38 × T + 5.22. T = total test time in minutes.
Post-Test: Grade is reduced to zero and a 3–5 minute slow-walk cool-down is performed. Heart rate, blood pressure, and symptoms are recorded. Results are compared to age- and sex-based norms and may be incorporated into cardiopulmonary rehabilitation programs.
Formula
VO₂max (men, ml/kg/min) = 1.444 × T + 14.99; VO₂max (women) = 1.38 × T + 5.22; T = minutes
Equipment Required
koşu bandı (eğim ayarı), kalp atım hızı monitörü, kronometre, kan basıncı manşeti
Normative Values (Age: 40-49)
| Classification | Male | Female |
|---|---|---|
| Excellent | >20 dak | >18 dak |
| Good | 16-20 dak | 14-18 dak |
| Average | 12-16 dak | 10-14 dak |
| Below Average | 8-12 dak | 6-10 dak |
| Poor | <8 dak | <6 dak |
Practical Applications
The Balke protocol is preferred over Bruce in rehabilitation settings, cardiopulmonary diseases, and sedentary individuals. The constant speed provides a more natural walking feel, and the longer test duration allows more physiological data to be collected.
Limitations
The constant speed may be too slow for athletic populations, leading to ceiling effects. Grade-only increases may produce different biomechanical stress in some participants.
Related Tests: Bruce Protocol, Modified Balke Protocol, Naughton Protocol
Sources: Balke B & Ware RW, 1959, US Armed Forces Med J; ACSM Guidelines, 2021
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