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How reliable are the equations for predicting maximal heart rate values in military personnel?
Goran Sporis1, Vlatko Vucetic, Igor Jukic
1Human Performance Laboratory, Faculty of Kinesiology, University of Zagreb, Horvacanski zavoj 15, 10000 Zagreb, Croatia.
Insights
Two common heart rate (HR) equations, Stevens Creek and Fox and Haskell, accurately predict maximal heart rate (HRmax) in military personnel for training and testing.
Area of Science:
- Exercise Physiology
- Sports Science
- Military Fitness
Background:
- Accurate prediction of maximal heart rate (HRmax) is crucial for effective exercise prescription and physiological assessment in military populations.
- Existing heart rate prediction equations may vary in validity and reliability across different demographic groups.
Purpose of the Study:
- To assess the accuracy and consistency of various heart rate prediction equations in Croatian military personnel.
- To identify the most reliable equations for determining maximal heart rate (HRmax) in this specific cohort.
Main Methods:
- A cohort of 509 Croatian Armed Forces members underwent graded exercise testing with gas exchange analysis.
- Maximal oxygen uptake (VO2max) and maximal heart rate (HRmax) were directly measured.
- Analysis of variance (ANOVA) was employed to compare the performance of seven different HRmax prediction equations.
Main Results:
- Statistically significant differences (p < 0.05) were observed among the seven evaluated heart rate equations.
- The Stevens Creek (HRmax = 205 - [age/2]) and Fox and Haskell (HRmax = 220 - age) equations demonstrated the highest correlation with measured HRmax.
- These two equations showed superior validity for predicting maximal heart rate in the studied military group.
Conclusions:
- The Stevens Creek and Fox and Haskell equations are recommended for estimating maximal heart rate (HRmax) in military personnel.
- These validated equations can be reliably used for training, testing, and daily exercise programming within military contexts.
- This study provides evidence-based guidance for optimizing physical readiness and performance monitoring in the armed forces.
Objectives:
The purpose of this study was to evaluate the validity and reliability of equations for predicting maximal values of heart rate (HR) in military personnel.
Methods:
Five hundred and nine members of the Croatian Armed Forces (age 29.1 +/- 5.5 years; height 180.1 +/- 6.6 cm; body mass 83.4 +/- 11.3 kg; maximal oxygen uptake [VO2(max)] 49.7 +/- 6.9 mL O2/kg/min) were tested. The graded exercise test with gas exchange measurements was used to determine VO2(max) and maximum HR (HR(max)). The analysis of variance was used to determine the differences between the equations to calculate HR(max).
Results:
The analysis of variance yielded statistically significant differences between seven HR equations (p < 0.05). The values from Stevens Creek's (HR(max) = 205 - [age/2]) and Fox and Haskell's (HR(max) = 220 - age) equations had the highest correlation with the HRmax obtained by the graded exercise test.
Conclusion:
The authors recommend using the HR(max) values from the Stevens Creek and the Fox and Haskell equations for the purpose of training, testing, and daily exercise routine in military personnel.
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