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Cross Country Poling Specific Motor Skill- and Strength Training. (CPMST)

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ClinicalTrials.gov Identifier: NCT03078673
Recruitment Status : Unknown
Verified May 2017 by Telemark University College.
Recruitment status was:  Recruiting
First Posted : March 13, 2017
Last Update Posted : May 25, 2017
Sponsor:
Collaborator:
The Norwegian Olympic Sports Center (Olympiatoppen)
Information provided by (Responsible Party):
Telemark University College

Brief Summary:
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.

Condition or disease Intervention/treatment Phase
Healthy Other: training intervention, motor skill training Other: training intervention, maximal strength training Other: control group Not Applicable

Detailed Description:

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:

  1. MOT results in technical changes in poling?
  2. MST results in technical changes in poling?
  3. MOT improves C in poling?
  4. MST improves C in poling?
  5. 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.


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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 45 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Motor Skill- and Strength Training; Importance for Technique, Work Economy and Time Performance in Cross Country Poling
Estimated Study Start Date : June 20, 2017
Estimated Primary Completion Date : April 1, 2018
Estimated Study Completion Date : June 1, 2018

Arm Intervention/treatment
Experimental: Motor skill training
training intervention. Poling specific indoor motor skill exercises performed 3 times pr week for 10 weeks in addition to regular training
Other: training intervention, motor skill training
cross country specific motor skill strength training

Experimental: Maximal strength training
training intervention. Maximal strength exercises performed 3 times pr week for 10 weeks in addition to regular training
Other: training intervention, maximal strength training
general maximal strength training

Experimental: Control group
Only regular training
Other: control group
regular training




Primary Outcome Measures :
  1. Time trial poling on a roller ski tarmac track [ Time Frame: 10 weeks ]
    Seconds used in a 6 km track.


Secondary Outcome Measures :
  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.



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Ages Eligible for Study:   16 Years to 30 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

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

Exclusion Criteria:

  • contraindications to maximal strength training and strength and endurance testing

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03078673


Contacts
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Contact: Arnstein Sunde, MSC 004795080164 arnstein.sunde@hit.no
Contact: Øyvind Støren, PhD 004796045270 oyvind.storen@hit.no

Locations
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Norway
Telemark UC Recruiting
Bø, Telemark, Norway, 3800
Contact: Annette Bischoff, PhD       Annette.Bischoff@usn.no   
Sponsors and Collaborators
Telemark University College
The Norwegian Olympic Sports Center (Olympiatoppen)
Investigators
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Principal Investigator: Arnstein Sunde, MSC Telemark UC
Study Chair: Øyvind Støren, PhD Telemark UC

Publications:
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Responsible Party: Telemark University College
ClinicalTrials.gov Identifier: NCT03078673     History of Changes
Other Study ID Numbers: CPMST
First Posted: March 13, 2017    Key Record Dates
Last Update Posted: May 25, 2017
Last Verified: May 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: planned published in a peer reviewed journal

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Keywords provided by Telemark University College:
Cross country poling, motor skill, strength training