Training-related changes in force-power profiles: implications for skeleton start performance

Research output: Contribution to journalArticle

Abstract

PURPOSE:
Athletes' force-power characteristics influence sled velocity during the skeleton start, which is a crucial determinant of performance. This study characterised force-power profile changes across an 18-month period and investigated the associations between these changes and start performance.

METHODS:
Seven elite- and five talent-squad skeleton athletes' (representing 80% of registered athletes in the country) force-power profiles and dry-land push-track performances were assessed at multiple time-points over two 6-month training periods and one 5-month competition season. Force-power profiles were evaluated using an incremental leg-press test (Keiser A420) and 15-m sled velocity was recorded using photocells.

RESULTS:
Across the initial maximum strength development phases, increases in maximum force (Fmax) and decreases in maximum velocity (Vmax) were typically observed. These changes were greater for talent (23.6 and -12.5%, respectively) compared with elite (6.1 and -7.6%, respectively) athletes. Conversely, decreases in Fmax (elite: -6.7%; talent: -10.3%) and increases in Vmax (elite: 8.1%; talent: 7.7%) were observed across the winter period, regardless of whether athletes were competing (elite) or accumulating sliding experience (talent). When the training emphasis shifted towards higher-velocity, sprint-based exercises in the second training season, force-power profiles seemed to become more velocity-oriented (higher Vmax and more negative force-velocity gradient) which was associated with greater improvements in sled velocity (r = 0.42 and -0.45, respectively).

CONCLUSIONS:
These unique findings demonstrate the scope to influence force-power generating capabilities in well-trained skeleton athletes across different training phases. In order to enhance start performance, it seems important to place particular emphasis on increasing maximum muscle contraction velocity.
LanguageEnglish
Pages412-419
JournalInternational Journal of Sports Physiology and Performance
Volume13
Issue number4
Early online date5 Sep 2017
DOIs
StatusPublished - 1 Apr 2018

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Aptitude
Skeleton
Athletes
Muscle Contraction
Power (Psychology)
Leg
Exercise

Cite this

@article{e3155ee5bef84dc88e4a7e8351b0d303,
title = "Training-related changes in force-power profiles: implications for skeleton start performance",
abstract = "PURPOSE:Athletes' force-power characteristics influence sled velocity during the skeleton start, which is a crucial determinant of performance. This study characterised force-power profile changes across an 18-month period and investigated the associations between these changes and start performance.METHODS:Seven elite- and five talent-squad skeleton athletes' (representing 80{\%} of registered athletes in the country) force-power profiles and dry-land push-track performances were assessed at multiple time-points over two 6-month training periods and one 5-month competition season. Force-power profiles were evaluated using an incremental leg-press test (Keiser A420) and 15-m sled velocity was recorded using photocells.RESULTS:Across the initial maximum strength development phases, increases in maximum force (Fmax) and decreases in maximum velocity (Vmax) were typically observed. These changes were greater for talent (23.6 and -12.5{\%}, respectively) compared with elite (6.1 and -7.6{\%}, respectively) athletes. Conversely, decreases in Fmax (elite: -6.7{\%}; talent: -10.3{\%}) and increases in Vmax (elite: 8.1{\%}; talent: 7.7{\%}) were observed across the winter period, regardless of whether athletes were competing (elite) or accumulating sliding experience (talent). When the training emphasis shifted towards higher-velocity, sprint-based exercises in the second training season, force-power profiles seemed to become more velocity-oriented (higher Vmax and more negative force-velocity gradient) which was associated with greater improvements in sled velocity (r = 0.42 and -0.45, respectively).CONCLUSIONS:These unique findings demonstrate the scope to influence force-power generating capabilities in well-trained skeleton athletes across different training phases. In order to enhance start performance, it seems important to place particular emphasis on increasing maximum muscle contraction velocity.",
author = "Colyer, {Steffi L.} and Stokes, {Keith A.} and Bilzon, {James L.J.} and Danny Holdcroft and Salo, {Aki I.T.}",
year = "2018",
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doi = "10.1123/ijspp.2017-0110",
language = "English",
volume = "13",
pages = "412--419",
journal = "International Journal of Sports Physiology and Performance",
issn = "1555-0265",
publisher = "Human Kinetics Publishers Inc.",
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}

TY - JOUR

T1 - Training-related changes in force-power profiles: implications for skeleton start performance

AU - Colyer,Steffi L.

AU - Stokes,Keith A.

AU - Bilzon,James L.J.

AU - Holdcroft,Danny

AU - Salo,Aki I.T.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - PURPOSE:Athletes' force-power characteristics influence sled velocity during the skeleton start, which is a crucial determinant of performance. This study characterised force-power profile changes across an 18-month period and investigated the associations between these changes and start performance.METHODS:Seven elite- and five talent-squad skeleton athletes' (representing 80% of registered athletes in the country) force-power profiles and dry-land push-track performances were assessed at multiple time-points over two 6-month training periods and one 5-month competition season. Force-power profiles were evaluated using an incremental leg-press test (Keiser A420) and 15-m sled velocity was recorded using photocells.RESULTS:Across the initial maximum strength development phases, increases in maximum force (Fmax) and decreases in maximum velocity (Vmax) were typically observed. These changes were greater for talent (23.6 and -12.5%, respectively) compared with elite (6.1 and -7.6%, respectively) athletes. Conversely, decreases in Fmax (elite: -6.7%; talent: -10.3%) and increases in Vmax (elite: 8.1%; talent: 7.7%) were observed across the winter period, regardless of whether athletes were competing (elite) or accumulating sliding experience (talent). When the training emphasis shifted towards higher-velocity, sprint-based exercises in the second training season, force-power profiles seemed to become more velocity-oriented (higher Vmax and more negative force-velocity gradient) which was associated with greater improvements in sled velocity (r = 0.42 and -0.45, respectively).CONCLUSIONS:These unique findings demonstrate the scope to influence force-power generating capabilities in well-trained skeleton athletes across different training phases. In order to enhance start performance, it seems important to place particular emphasis on increasing maximum muscle contraction velocity.

AB - PURPOSE:Athletes' force-power characteristics influence sled velocity during the skeleton start, which is a crucial determinant of performance. This study characterised force-power profile changes across an 18-month period and investigated the associations between these changes and start performance.METHODS:Seven elite- and five talent-squad skeleton athletes' (representing 80% of registered athletes in the country) force-power profiles and dry-land push-track performances were assessed at multiple time-points over two 6-month training periods and one 5-month competition season. Force-power profiles were evaluated using an incremental leg-press test (Keiser A420) and 15-m sled velocity was recorded using photocells.RESULTS:Across the initial maximum strength development phases, increases in maximum force (Fmax) and decreases in maximum velocity (Vmax) were typically observed. These changes were greater for talent (23.6 and -12.5%, respectively) compared with elite (6.1 and -7.6%, respectively) athletes. Conversely, decreases in Fmax (elite: -6.7%; talent: -10.3%) and increases in Vmax (elite: 8.1%; talent: 7.7%) were observed across the winter period, regardless of whether athletes were competing (elite) or accumulating sliding experience (talent). When the training emphasis shifted towards higher-velocity, sprint-based exercises in the second training season, force-power profiles seemed to become more velocity-oriented (higher Vmax and more negative force-velocity gradient) which was associated with greater improvements in sled velocity (r = 0.42 and -0.45, respectively).CONCLUSIONS:These unique findings demonstrate the scope to influence force-power generating capabilities in well-trained skeleton athletes across different training phases. In order to enhance start performance, it seems important to place particular emphasis on increasing maximum muscle contraction velocity.

U2 - 10.1123/ijspp.2017-0110

DO - 10.1123/ijspp.2017-0110

M3 - Article

VL - 13

SP - 412

EP - 419

JO - International Journal of Sports Physiology and Performance

T2 - International Journal of Sports Physiology and Performance

JF - International Journal of Sports Physiology and Performance

SN - 1555-0265

IS - 4

ER -