A Simple Method to Predict the Highest Power Output to Elicit Peak Oxygen Consumption in a Single Session

Öz

Although the highest power output to elicit peak O2 consumption (VO_2peak)(aerobic limit power; ALP) is an important boundary which separates severe and extreme exercise domain and it needs several constant-load tests to estimate an athlete’s individual ALP. The purpose of this study was to suggest an approach to predict the athletes’ ALP in a single test session. 12 well-trained cyclists (VO_2max: 64.7±4.1 mL∙min-1∙kg-1 and peak power output (PPO): 374.1±65.7 W) volunteered for this investigation. Ramp incremental test was performed (+1 W·2 s-1) to determine VO_2peak, and the final power output at the end of the test (FP) was evaluated with and without mean response time correction (FP_MRT and FP_MRT, respectively). Constant-load exercises were performed to identify VO_2max and PPO. Then, athletes’ ALP (the highest power output giving a VO₂ value closer to VO_2max more than 5%) levels were detected by 15-W intervals with constant-load exercises in separate days. Difference between FP_MRT and ALP was not significant (435.2±50.8 vs. 435.4±62.5 W, p=0.968, respectively). Bland Altman showed high agreement between the methods (Bias=–0,20±17,6 W; p=0.968). FP_MRT was corresponded to 117.7±8.8% of PPO, while ALP was corresponded to 117.1±7.37% of PPO (p=0.00). The highest 15-s VO₂ means revealed from ramp incremental test were similar to VO₂ responses obtained from the ALP (62.3±4.9 vs. 61.5±4.3 mL∙min-1∙kg-1; p=0.119; and 96.2% vs. 95% VO_2max, respectively). In conclusion, instead of several exhausted test sessions in separate days, a ramp incremental test which underestimates the VO_2max may be a practical method to predict the ALP and its VO₂ response in a single test session by a ramp incremental test. 

Anahtar Kelimeler

• Final Power,Limit Power,Ramp Test,VO2max,VO2peak

Proje Numarası

17-BESYO-002

Tek Bir Seansta Zirve Oksijen Kullanım Düzeyini Veren En Yüksek Güç Çıktısını Tahmin Etmenin Basit Bir Yöntemi

Öz

Zirve O2 tüketim düzeyi ( VO_2pik) veren en yüksek güç çıktısı (aerobik limit güç; ALG) şiddetli ve aşırı egzersiz alanlarını ayıran önemli bir eşiktir ve sporcularda bireysel bir ALG belirleyebilmek için çok sayıda sabit yüklü tüketici test yapmak gerekmektedir. Bu çalışmanın amacı; sporcuların ALG’lerini tek bir seansta belirleyebilecek bir yaklaşım önermektir. Araştırmaya iyi antrene 12 bisiklet sporcusu katılmıştır ( VO_2maks64,7±4,2 mL∙dk-1∙kg-1; Zirve Güç (ZG): 374,1±65,7 W).VO_2pik düzeyinin belirlenmesi için lineer yük artışlı (ramp) testler uygulatılmıştır (+1 W·2 s-1) ve protokollerin sonunda ulaşılan final güç üretim değerleri (FG) ortalama yanıt zamanı (mean response time: MRT) düzeltmesi uygulanmadan (FG_MRT) ve uygulanarak (FG_MRT) değerlendirilmiştir. Sporcuların VO_2maks’ı ve bu değeri veren ZG değerleri, doğrulama testleri uygulanarak bulunmuştur. Devamında sporcuların ALG (VO_2maks’a %5’ten daha yakın VO₂ değeri veren en yüksek güç çıktısı) değerleri, 15 W’lık intervallerle bitkinlikle sonlanan sabit yüklü testler yoluyla ayrı günlerde taranmıştır. FG_MRT ile ALG değerleri arasındaki fark anlamlı değildir (FG_MRT: 435,2±50,8; ALG: 435,4±62,5 W, p=0,968). Bland-Altman sonuçları yüksek uyum göstermiştir (Bias=0,20±17,6 W; p=0,968). FG_MRT, gerçek ZG’nin %117,5±8,8’ine karşılık gelirken, belirlenen ALG değeri ZG’nin %117,1±7,37’sine karşılık gelmiştir (p=0,759). Diğer yandan ramp testinden elde edilen en yüksek 15-s VO₂ ortalamaları da ALG yükündeki VO₂ yanıtlarıyla benzerdir ( Ramp Test: 62,3±4,9 ml∙dk-1∙kg-1, %96,2; ALG: 61,5±4,3 ml∙dk-1∙kg-1, %95; p=0,119 ). Sonuç olarak, ALG’yi belirleyebilmek için ayrı günlerde çok sayıda bitkinlikle sonlanan test yapmak yerine, tek seansta bir ramp test uygulamasının VO_2maks’ı düşük tahmin ettiği ancak ALG’yi ve bu değere karşılık gelen VO₂ yanıtını belirleyebilmenin oldukça pratik bir yöntemi olabileceği bulunmuştur.

Anahtar Kelimeler

• Final Güç,Aerobik Limit Güç,Ramp Test,VO2maks,VO2pik

Destekleyen Kurum

Ege Üniversitesi Bilimsel Araştırma Projeler Koordinatörlüğü

Proje Numarası

17-BESYO-002

Kaynakça

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