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Completed

NCT Number: NCT03078673

Cross Country Poling Specific Motor Skill- and Strength Training.

Will motor skill- and/or strength training affect technique, work economy and time performance in cross-country poling? Competitive cross-country skiers (age 16- 30) will perform a 10 weeks training intervention. They will be randomized in one of the following three groups: poling specific motor skill training 3 times per week in addition to their regular training, maximal strength training 3 times per week in addition to their regular training and a control group who only perform their regular training. Pre- and post intervention, all participants will perform tests in VO2max (running), VO2max (poling), work economy (poling), video and inertial measurement unit (IMU) analyzes of poling technique, time performance test (poling), motor skill tests and maximal strength tests.

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Key information

Conditions

Healthy

Age range

16 year–30 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Telemark UC

Bø, Telemark, 3800, Norway

About this study

Motor Skill- and Maximal Strength Training; Importance for Technique, Work Economy and Time Performance in Cross Country Poling Purpose The relative use of poling in classic cross-country skiing has increased over the last years. (Danielsen et al 2015). As a result of this poling performance has become increasingly important for over all classic cross-country skiing performance. Poling performance with best possible technical skills, implying high velocity with a least possible energy cost (C) should thus be beneficial. Previous research (Østerås et al 2002) has shown improved work economy in poling after maximal strength training (MST). To the investigators knowledge, the effect of motor skill training (MOT) on C has not previously been investigated. In this study MOT and MST will therefore be investigated (in two different groups of cross-country skiers), how they may affect poling technique, C, lactate threshold (LT) and poling performance. The results from this study may give further insight and knowledge in scientific based training practice.

The purpose of this study is thus to investigate if:

  • MOT results in technical changes in poling?
  • MST results in technical changes in poling?
  • MOT improves C in poling?
  • MST improves C in poling?
  • changes in 1-4 improves time performance in poling?

In order to investigate this, competitive cross-country skiers (age 16- 30) will perform a 10 weeks training intervention. They will be randomized in one of the following three groups: poling specific motor skill training (10-12 x 3 repetitions maximum, RM) in specific designed cross country exercises 3 times per week in addition to their regular training. Further, maximal strength training in squat, dead lift, bench press, bench pull and pull down (2-5 x 3 repetitions RM) 3 times per week in addition to their regular training and a control group who only perform their regular training. Pre- and post intervention, all participants will perform tests in VO2max (running), VO2max (poling), work economy (poling), video and IMU analyzes of poling technique, time performance test (poling), motor skill tests and maximal strength tests.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • healthy, competitive cross country athletes 16-30 years old

Exclusion criteria

  • contraindications to maximal strength training and strength and endurance testing

Treatment and study plan

training intervention, motor skill training

Other

cross country specific motor skill strength training

training intervention, maximal strength training

Other

general maximal strength training

Control Group

Other

regular training

Primary outcomes

  1. Time trial poling on a roller ski tarmac track

    Time frame: 10 weeks

    Seconds used in a 6 km track.

Secondary outcomes

  1. Video analyzes of technique

    Time frame: 10 weeks

    Joint angles. Unique outcome measure.

  2. Analyzes of angular velocity by use of IMU (inertial movement devices)

    Time frame: 10 weeks

    Degree/second by use of gyrometer from the Musclelab System from Ergotest Technology. Unique outcome measure.

  3. Analyzes of external force (N) in poles during poling

    Time frame: 10 weeks

    Force measurements by use of the Musclelab System from Ergotest Technology. Unique outcome measure.

  4. Maximal pulldown strength (RM/kg)

    Time frame: 10 weeks

    Kilos in pulldown. Unique outcome measure.

  5. Maximal leggpress strength (RM/kg)

    Time frame: 10 weeks

    Kilos in leggpress. Unique outcome measure.

  6. Maximal pulldown power (Watt)

    Time frame: 10 weeks

    Watts in pulldown by use of Musclelab.System (Ergotest Technology). Unique outcome measure.

  7. Maximal leggpress power (Watt)

    Time frame: 10 weeks

    Watts in leggpress by use of Musclelab.System (Ergotest Technology). Unique outcome measure.

  8. Maximal oxygen uptake (VO2max, ml/kg/min) in running on treadmill

    Time frame: 10 weeks

    Ergospirometrical incremental (ramp) protocols using Cortex Metalyzer. Unique outcome measure.

  9. Maximal oxygen uptake (VO2max, ml/kg/min) in poling on treadmill

    Time frame: 10 weeks

    Ergospirometrical incremental (ramp) protocols using Cortex Metalyzer. Unique outcome measure.

  10. Lactate threshold (mmol/L blood) in poling on treadmill

    Time frame: 10 weeks

    Measurement of lactate using Lactate Scout (EKF Diagnostics) in different submaximal work periods up to the point reaching warm up values plus 2,3 mmol/L. Unique outcome measure.

  11. Poling economy

    Time frame: 10 weeks

    Measurement of oxygen consumption per meter poling. Unique outcome measure.

Sponsors and collaborators

Lead sponsor

University of South-Eastern Norway

Other

Collaborators

  • The Norwegian Olympic Sports Center (Olympiatoppen)

Registry information

Official study title

Motor Skill- and Strength Training; Importance for Technique, Work Economy and Time Performance in Cross Country Poling

Acronym: CPMST

Important dates

Study start
2017
Primary completion
2019
Study completion
2019
First posted
Mar 13, 2017
Registry last updated
Sep 27, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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