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DOI: 10.1055/s-0031-1275671
© Georg Thieme Verlag KG Stuttgart · New York
The Dmax is Highly Related to Performance in Middle-Aged Females
Publikationsverlauf
accepted after revision March 14, 2011
Publikationsdatum:
11. Mai 2011 (online)
![](https://www.thieme-connect.de/media/sportsmed/201109/lookinside/thumbnails/10.1055-s-0031-1275671-1.jpg)
Abstract
The present study examined whether the running speed at the lactate threshold estimated by the maximal deviation method (LTDmax) is highly correlated and in agreement with 10-km road race performance (S10 km) in middle-aged female runners. Additionally, the LTDmax was compared with the visual detection of the inflection point (LTVisual), the fixed lactate level of 4 mmol.L−1 (LT4) and the peak speed (Speak) in relation to performance. Sixteen middle-aged, recreational female runners performed a discontinuous, incremental treadmill test. The initial speed was set at 7 km.h−1, and this speed was increased every 3 min by 1 km.h−1 with a 30-s rest between the stages used for earlobe capillary blood sample collection. All of the participants took part in the same local 10-km road race, and S10 km mean speed was calculated. The speeds (mean±SD) were 10.5±1.0 (S10 km), 10.5±1.0 (LTVisual), 10.9±0.9 (LTDmax), 11.4±1.3 (LT4) and 13.5±1.1 km.h−1 (Speak). The LTDmax had the narrowest limits of agreement (0.3±0.4 km.h−1) and was the most highly correlated with the S10 km (r=0.98), followed by the Speak (r=0.95), LT4 (r=0.85) and LTVisual (r=0.81). In conclusion, the LTDmax should be more widely used to estimate long-distance performance and to verify improvements in training.
Key words
agreement - correlation - lactate threshold - maximal deviation method
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Correspondence
Dr. Fabiana Andrade Machado
State University of Maringá
Department of Physical Education
Av. Colombo 5790
87.020-900 Maringá
Brazil
Telefon: + 55/44/3011 4315
Fax: + 55/44/3011 4470
eMail: famachado_uem@hotmail.com