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

Abstract

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. 

Keywords

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

Project Number

17-BESYO-002

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

Abstract

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.

Keywords

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

Supporting Institution

Ege Üniversitesi Bilimsel Araştırma Projeler Koordinatörlüğü

Project Number

17-BESYO-002

References

1. Åstrand PO, Rodahl K. (1977). Textbook of work physiology: physiological bases of exercise. (2th Edition) New York: McGraw-Hill Book Company.
2. Atkinson G, Nevill AM. (1998). Statistical methods for assessing measurement error (reliability) in variables relevant to sports medicine. Sports Medicine, 26(4),217–38.
3. Billat VL, Slawinski J, Bocquet V, Demarle A, Lafitte L, Chassaing P, vd. (2000). Intermittent runs at the velocity associated with maximal oxygen uptake enables subjects to remain at maximal oxygen uptake for a longer time than intense but submaximal runs. European Journal of Applied Physiology, 81(3),188–96.
4. Black MI, Jones AM, Bailey SJ, Vanhatalo A. (2015). Self-pacing increases critical power and improves performance during severe-intensity exercise. Applied physiology, nutrition, and metabolism, 40(7),662–70.
5. Bland JM, Altman DG. (1986). Statistical methods for assessing agreement between two methods of clinical measurement. The Lancet, 327(8476),307–10.
6. Boone J, Koppo K, Bouckaert J. (2008). The VO2 response to submaximal ramp cycle exercise: Influence of ramp slope and training status. Respiratory physiology & neurobiology, 161(3),291–7.
7. Buchheit M, Laursen PB. (2013). High-Intensity interval training, solutions to the programming puzzle. Sports medicine, 43(5),313–38.
8. Caputo F, Denadai BS. (2008). The highest intensity and the shortest duration permitting attainment of maximal oxygen uptake during cycling: effects of different methods and aerobic fitness level. European Journal of Applied Physiology, 103(1),47–57.

9. Colakoglu M, Ozkaya O, Balci GA, Yapicioglu B. (2016). Stroke volume responses may be related to the gap between peak and maximal O2consumption. Isokinetics and Exercise Science, 24(2),133–9.
10. de Aguiar RA, Turnes T, de Oliveira Cruz RS, Caputo F. (2013). Fast-start strategy increases the time spent above 95 %VO2max during severe-intensity intermittent running exercise. European journal of applied physiology, 113(4),941–9.
11. Dupont G, Blondel N, Lensel G, Berthoin S. (2002). Critical velocity and time spent at a high level of VO2 for short intermittent runs at supramaximal velocities. Canadian journal of applied physiology, 27(2),103–15.
12. Gaesser GA, Poole DC. (1996). The slow component of oxygen uptake kinetics in humans. Exercise and sport sciences reviews, 24(1),35–71.
13. Hill D, Williams C, Burg S. (1997). Responses to exercise at 92 % and 100 % of the velocity associated with VO2max. International journal of sports medicine, 18(5),325–9.
14. Hill DW, Poole DC, Smith JC. (2002). The relationship between power and the time to achieve VO2max. Medicine and science in sports and exercise, 34(4),709–14.
15. Hill DW, Stevens EC. (2005). VO2 response profiles in severe intensity exercise. The Journal of sports medicine and physical fitness, 45(3),239–47.
16. Jones AM, Vanhatalo A, Burnley M, Morton RH, Poole DC. (2010). Critical power: implications for determination of VO2max and exercise tolerance. Medicine and science in sports and exercise, 42(10),1876–90.
17. Leo JA, Sabapathy S, Simmonds MJ, Cross TJ. (2017). The respiratory compensation point is not a valid surrogate for critical power. Medicine and science in sports and exercise, 49(7),1452–60.
18. Lepretre P-M, Koralsztein J-P, Billat VL. (2004). Effect of exercise intensity on relationship between VO2max and cardiac output. Medicine and science in sports and exercise, 36(8),1357–63.
19. Raimundo JAG, Turnes T, de Aguiar RA, Lisbôa FD, Loch T, Ribeiro G, vd. (2019). The severe exercise domain amplitude: a comparison between endurance runners and cyclists. Research Quarterly for Exercise and Sport, 90(1),3–13.
20. Turnes T, de Aguiar RA, de Oliveira Cruz RS, Lisbôa FD, Pereira KL, Caputo F. (2016). Short‑term interval training at both lower and higher intensities in the severe exercise domain result in improvements in on‑kinetics. European Journal of Applied Physiology, 116(10),1975–84.
21. Turnes T, de Aguiar R, de Oliveira Cruz R, Pereira K, Salvador A, Caputo F. (2016). High-intensity ınterval training in the boundaries of the severe domain: effects on sprint and endurance performance. International Journal of Sports Medicine, 37(12),944–51.
22. Wakefield BR, Glaister M. (2009). Influence of work-interval intensity and duration on time spent at a high percentage of VO2max during intermittent supramaximal exercise. Journal of strength and conditioning research, 23(9),2548–54.