Non-invasive Evaluation of Anaerobic Threshold and Anaerobic Power Relationship of Heart Rate Variability

Öz

The purpose of this study is to investigate the differences in the changes between pre-test, during-test, and post-test values of anaerobic-threshold (AT) and anaerobic-power (AP) in terms of heart-rate-variability (HRV), as well as the relationship between AT and AP with HRV parameters. The study involved 25 healthy male volunteers (mean age=24±0.9 years; height=177.5±6.2 cm; weight=80.4±8.3 kg). On the first day, measurements of height, weight, and body composition were taken. The Wingate anaerobic capacity test was performed, and recordings were made for HRV before the test (30 seconds), during the test (30 seconds), and after the test (30 seconds). On the second day, the participants underwent a cardiorespiratory exercise test using the Bruce protocol. Recordings for HRV were taken before the test (30 seconds), during the test, and at the end of the test (30 seconds). Repeated measures analysis of variance (ANOVA) was used to compare the participants' HRV parameters between pre-test, test, and post-test. Pairwise comparisons within the groups were determined using the Bonferroni test. Pearson correlation coefficient was used to determine the relationship between AP and AT. The analysis of the research data revealed that there were significant differences in MeanRR for AP and AT between pre-test, during-test, and post-test (p<0.001). For SDNN, the changes were significant between during-test, post-test (p<0.05), and between pre-test, post-test (p < 0.01) in the measurement of AP. For RMSSD, the changes were only significant between pre-test, during-test, and between pre-test, post-test in the AT zone (p<0.001). Significant changes were observed between pre-test and during-test for LFnu (p<0.05) and HFnu (p<0.01). As for the relationship between AT and AP, there was only a significant positive relationship for LF/HF among the HRV parameters. According to the results of this study, HRV for AT and AP continues to increase during the test from pre-test and decreases, with no recovery observed after the test. The relationship between the changes in HRV and AT and AP is only significant in a positive direction for LF/HF. Although AT and AP show similarities in terms of the decrease in HRV parameters, they cannot be fully considered as directly related to each other.

Anahtar Kelimeler

• Anaerobic Power
• Aotonomic Nervous System
• Anaerobic Threshold

Anaerobik Eşik ve Anaerobik Güç İlişkisinin Kalp Atım Hızı Değişkenliğinin Non-invazif Değerlendirilmesi

Öz

Bu araştırmanın amacı anaerobik eşik (AE) ve anaerobik gücün (AG) kalp-atım-hızı-değişkenliği (KAHD) açısından test-öncesi, test-sırası ve sonrası değerlerle değişimi arasındaki farklılığın ve AE ile AG’nin KAHD parametreleri arasındaki ilişkinin incelenmesidir. 25 sağlıklı erkek gönüllü olarak araştırmaya katıldı (Ort. yaş=24±0,9 yıl; boy=177,5±6,2 cm; ağırlık=80,4±8,3 kg). İlk gün boy, ağırlık ve vücut kompozisyonu ölçümü yapıldı. Wingate anaerobik kapasite testi uygulandı. Test-öncesinde (30 saniye), test-sırasında (30 saniye) ve test-sonrasında (30 saniye) KAHD için kayıt alındı. İkinci gün kardiyo-pulmoner egzersiz testi Bruce protokolü uygulandı. Test başlamadan önce (30 saniye), test süresince ve test bitiminde (30 saniye) KAHD kaydı alındı. Ön-test, test ve son-test için katılımcıların KAHD parametrelerini karşılaştırmak için tekrarlanan varyans analizi (ANOVA) kullanıldı. Grup içi karşılaştırmalar Bonferroni testi ile belirlendi. AE ile AG ilişkisi için Pearson korelasyon katsayısı belirlendi. Araştırma verilerinin analizi sonucunda AE ve AG için MeanRR için test-öncesi, test-sırası ve sonrasında anlamlıdır (p<0,001). SDNN için değişim AG ölçümünde test-sırası, test-sonrası (p<0,05) ve test-öncesi, test-sonrası (p<0,01), RMSSD için ise sadece AE bölgesinde test-öncesi, test sırası ve test-öncesi, test-sonrası arasında anlamlıdır (p<0,001). LFnu (p<0,05) ve HFnu (p<0,01) için test-öncesi ile test-sırası arasında anlamlı değişim görülmüştür. AE ile AG arasında ise KAHD parametrelerinden sadece LF/HF için anlamlı pozitif ilişki söz konusudur. Bu araştırma sonuçlarına göre AE ile AG için KAHD test-öncesinden başlayarak test-sırasında ve test-sonrasında artarak düşmeye devam etmekte olup test-sonrasında toparlanma sağlanamamaktadır. AE ile AG arasında KAHD değişimleri arasındaki ilişki sadece LF/HF için pozitif yönde anlamlıdır. AE ile AG, KAHD parametrelerinin düşüşü açısından benzerlik gösterse de tam olarak birbiriyle ilişkili olduğu söylenemez.

Anahtar Kelimeler

• Anaerobik Güç
• Otonom Sinir Sistemi
• Anaerobik Eşik

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