NCT03078673

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.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
45

participants targeted

Target at P50-P75 for not_applicable healthy

Timeline
Completed

Started Jun 2017

Longer than P75 for not_applicable healthy

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

May 30, 2016

Completed
10 months until next milestone

First Posted

Study publicly available on registry

March 13, 2017

Completed
3 months until next milestone

Study Start

First participant enrolled

June 20, 2017

Completed
1.8 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 1, 2019

Completed
3 months until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2019

Completed
Last Updated

September 27, 2021

Status Verified

May 1, 2017

Enrollment Period

1.8 years

First QC Date

May 30, 2016

Last Update Submit

September 21, 2021

Conditions

Keywords

Cross country poling, motor skill, strength training

Outcome Measures

Primary Outcomes (1)

  • Time trial poling on a roller ski tarmac track

    Seconds used in a 6 km track.

    10 weeks

Secondary Outcomes (11)

  • Video analyzes of technique

    10 weeks

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

    10 weeks

  • Analyzes of external force (N) in poles during poling

    10 weeks

  • Maximal pulldown strength (RM/kg)

    10 weeks

  • Maximal leggpress strength (RM/kg)

    10 weeks

  • +6 more secondary outcomes

Study Arms (3)

Motor skill training

EXPERIMENTAL

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

Maximal strength training

EXPERIMENTAL

training intervention. Maximal strength exercises performed 3 times pr week for 10 weeks in addition to regular training

Other: training intervention, maximal strength training

Control group

EXPERIMENTAL

Only regular training

Other: control group

Interventions

cross country specific motor skill strength training

Motor skill training

general maximal strength training

Maximal strength training

regular training

Control group

Eligibility Criteria

Age16 Years - 30 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64)

You may qualify if:

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

You may not qualify if:

  • contraindications to maximal strength training and strength and endurance testing

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Telemark UC

Bø, Telemark, 3800, Norway

Location

Related Publications (2)

  • Danielsen J, Sandbakk O, Holmberg HC, Ettema G. Mechanical Energy and Propulsion in Ergometer Double Poling by Cross-country Skiers. Med Sci Sports Exerc. 2015 Dec;47(12):2586-94. doi: 10.1249/MSS.0000000000000723.

    PMID: 26110695BACKGROUND
  • Osteras H, Helgerud J, Hoff J. Maximal strength-training effects on force-velocity and force-power relationships explain increases in aerobic performance in humans. Eur J Appl Physiol. 2002 Dec;88(3):255-63. doi: 10.1007/s00421-002-0717-y. Epub 2002 Oct 17.

    PMID: 12458369BACKGROUND

MeSH Terms

Interventions

Control Groups

Intervention Hierarchy (Ancestors)

Epidemiologic Research DesignEpidemiologic MethodsInvestigative TechniquesResearch DesignMethods

Study Officials

  • Arnstein Sunde, MSC

    Telemark UC

    PRINCIPAL INVESTIGATOR
  • Øyvind Støren, PhD

    Telemark UC

    STUDY CHAIR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
NONE
Purpose
BASIC SCIENCE
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

May 30, 2016

First Posted

March 13, 2017

Study Start

June 20, 2017

Primary Completion

April 1, 2019

Study Completion

July 1, 2019

Last Updated

September 27, 2021

Record last verified: 2017-05

Data Sharing

IPD Sharing
Will share

planned published in a peer reviewed journal

Locations