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Int J Sports Med 2011; 32(9): 672-676
DOI: 10.1055/s-0031-1275671
Physiology & Biochemistry

© Georg Thieme Verlag KG Stuttgart · New York

The Dmax is Highly Related to Performance in Middle-Aged Females

F. A. Machado1 , S. M. F. de Moraes2 , C. S. Peserico3 , P. V. Mezzaroba3 , W. P. Higino4
  • 1State University of Maringá, Department of Physical Education, Maringá, Brazil
  • 2State University of Maringá, Department of Physiologic Sciences, Maringá, Brazil
  • 3State University of Maringá, Laboratory of Effort Physiology – Department of Physiologic Sciences, Maringá, Brazil
  • 4Catholic University Center Salesiano Auxilium, Department of Physical Education, Lins, Brazil
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Publikationsverlauf

accepted after revision March 14, 2011

Publikationsdatum:
11. Mai 2011 (online)

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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