lactate turn point
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Author(s):  
Andrew M. Jones ◽  
Brett S. Kirby ◽  
Ida E. Clark ◽  
Hannah M. Rice ◽  
Elizabeth Fulkerson ◽  
...  

The requirements of running a 2 hour marathon have been extensively debated but the actual physiological demands of running at ~21.1 km/h have never been reported. We therefore conducted laboratory-based physiological evaluations and measured running economy (O2 cost) while running outdoors at ~21.1 km/h, in world-class distance runners as part of Nike's 'Breaking 2' marathon project. On separate days, 16 male distance runners (age, 29 ± 4 years; height, 1.72 ± 0.04 m; mass, 58.9 ± 3.3 kg) completed an incremental treadmill test for the assessment of V̇O2peak, O2 cost of submaximal running, lactate threshold and lactate turn-point, and a track test during which they ran continuously at 21.1 km/h. The laboratory-determined V̇O2peak was 71.0 ± 5.7 ml/kg/min with lactate threshold and lactate turn-point occurring at 18.9 ± 0.4 and 20.2 ± 0.6 km/h, corresponding to 83 ± 5 % and 92 ± 3 % V̇O2peak, respectively. Seven athletes were able to attain a steady-state V̇O2 when running outdoors at 21.1 km/h. The mean O2 cost for these athletes was 191 ± 19 ml/kg/km such that running at 21.1 km/h required an absolute V̇O2 of ~4.0 L/min and represented 94 ± 3 % V̇O2peak. We report novel data on the O2 cost of running outdoors at 21.1 km/h, which enables better modelling of possible marathon performances by elite athletes. Using the value for O2 cost measured in this study, a sub-2 hour marathon would require a 59 kg runner to sustain a V̇O2 of approximately 4.0 L/min or 67 ml/kg/min.



2014 ◽  
Vol 46 ◽  
pp. 707
Author(s):  
Patrick Fasching ◽  
Stefan Rinnerhofer ◽  
Georg Wultsch ◽  
Gerhard Tschakert ◽  
Peter Hofmann ◽  
...  


2011 ◽  
Vol 43 (Suppl 1) ◽  
pp. 629-630 ◽  
Author(s):  
Claus Cagran ◽  
Gerhard Tschakert ◽  
Nikolaus Stühlinger ◽  
Rochus Pokan ◽  
Serge P. von Duvillard ◽  
...  


2009 ◽  
Vol 41 ◽  
pp. 34-35 ◽  
Author(s):  
Peter Hofmann ◽  
Gerhard Tschakert ◽  
Markus Stark ◽  
Günther Schwaberger ◽  
Rochus Pokan ◽  
...  


1994 ◽  
Vol 15 (05) ◽  
pp. 232-237 ◽  
Author(s):  
P. Hofmann ◽  
R. Pokan ◽  
K. Preidler ◽  
H. Leitner ◽  
D. Szolar ◽  
...  


1994 ◽  
Vol 69 (2) ◽  
pp. 132-139 ◽  
Author(s):  
P. Hofmann ◽  
V. Bunc ◽  
H. Leitner ◽  
R. Pokan ◽  
G. Gaisl


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