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Related Experiment Videos

Lactate response to uphill roller skiing: diagonal stride versus double pole techniques

S W Mittelstadt1, M D Hoffman, P B Watts

  • 1Department of Physical Medicine and Rehabilitation, Medical College of Wisconsin, Milwaukee 53295, USA.

Medicine and Science in Sports and Exercise
|November 1, 1995
PubMed
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Lactate responses during roller skiing show no significant difference between double poling and diagonal stride on low grades. However, diagonal striding may offer a physiological advantage on steep inclines due to lower blood lactate concentrations.

Area of Science:

  • Exercise Physiology
  • Sports Science
  • Biathlon and Cross-Country Skiing Research

Background:

  • Cross-country skiing utilizes various techniques, including double poling and diagonal stride, each with distinct physiological demands.
  • Understanding the metabolic responses, specifically blood lactate accumulation, is crucial for optimizing training and performance in elite skiers.

Purpose of the Study:

  • To compare the blood lactate responses to roller skiing using double pole versus diagonal stride techniques.
  • To investigate the influence of different grades (1.7% and 7.1%) on lactate accumulation during these skiing techniques.

Main Methods:

  • Eight collegiate or national level cross-country ski racers performed roller skiing on a ski treadmill at various speeds and inclines.
  • Measurements included whole blood lactate concentration, heart rate, oxygen consumption (VO2), and rating of perceived exertion (RPE).

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Main Results:

  • Blood lactate concentrations were not significantly different between double poling and diagonal striding on a 1.7% grade.
  • On a 7.1% grade, blood lactate concentrations were significantly higher during double poling compared to diagonal striding across all tested speeds.
  • These differences were also observed when comparing double poling to diagonal striding at 70% of peak VO2, a heart rate of 145, and an RPE of 12 on the steeper grade.

Conclusions:

  • Blood lactate concentrations do not provide a physiological basis for choosing between double poling and diagonal striding on low-grade terrain.
  • Diagonal striding may offer a physiological advantage on steep grades due to lower blood lactate accumulation, potentially allowing for higher intensity or longer duration skiing.
  • These findings have implications for technique selection in cross-country skiing, particularly in varying terrain conditions.