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Fırat Üniversitesi Sağlık Bilimleri Tıp Dergisi
2015, Cilt 29, Sayı 3, Sayfa(lar) 117-121
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The Work Rate Divided to Heart Rate Ratio during an Incremental Exercise Test is an Effective Method for Estimation of Anaerobic Threshold
Sermin ALGÜL1, İhsan SERHATLIOĞLU2, Oğuz ÖZÇELİK1
1Fırat Üniversitesi, Tıp Fakültesi, Fizyoloji Anabilim Dalı, Elazığ, TÜRKİYE
2Fırat Üniversitesi, Tıp Fakültesi, Biyofizik Anabilim Dalı, Elazığ, TÜRKİYE
Keywords: Anaerobic threshold, heart rate, conconi method, exercise, V-slope

Objective: The effectiveness of work rate divided to heart rate ratio on anaerobic threshold (AT) estimation was evaluated.

Material and Method: Twenty five male subjects performed an incremental exercise test (15 W/min) until the limit of tolerance. During exercise, respiratory and gas exchange parameters were evaluated breath-by-breath. The heart rate was recorded as beat-by-beat. AT estimated from the work rate divided to heart rate ratio, heart rate versus work rate plot (Conconi method) and compared with the V-slope method.

Results: A deviation from linearity in heart rate was observed only in 6 subjects. Other 19 subjects have linear increase in heart rate to work rate relationships. The work rate divided to heart rate ratio showed a clear break point in all subjects and closely associated with the V-slope break point: 1.91±0.04 L/min vs 1.89±0.03 L/min. Absent of a break point in heart rate work rate relationship (76%) and an extremely low percent of association in AT estimation between Conconi and V-slope method (%16) may reduce reliability of Conconi test.

Conclusion: Thus, caution should be taken by investigators especially making important decision for patients and sports training. However, work rate to heart rate ratio could provide easy and reliable AT estimation.


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