scholarly journals Voluntary suppression of associated activity decreases force steadiness in the active hand

2021 ◽  
Author(s):  
D. Colomer‐Poveda ◽  
I. Zijdewind ◽  
J. Dolstra ◽  
G. Márquez ◽  
T. Hortobágyi
Keyword(s):  
Force Steadiness

Relationship between postural sway on an unstable platform and ankle plantar flexor force steadiness in community-dwelling older women

2021 ◽  
Vol 84 ◽  
pp. 227-231
Author(s):  
Tetsuya Hirono ◽  
Tome Ikezoe ◽  
Momoko Yamagata ◽  
Takehiro Kato ◽  
Misaka Kimura ◽  
...  
Keyword(s):  
Older Women ◽  
Postural Sway ◽  
Community Dwelling ◽  
Plantar Flexor ◽  
Force Steadiness ◽  
Unstable Platform

Can Resistance Training Improve Upper Limb Postural Tremor, Force Steadiness and Dexterity in Older Adults? A Systematic Review

2019 ◽  
Vol 49 (8) ◽  
pp. 1199-1216
Author(s):  
Justin W. L. Keogh ◽  
Sinead O’Reilly ◽  
Ethan O’Brien ◽  
Steven Morrison ◽  
Justin J. Kavanagh
Keyword(s):  
Systematic Review ◽  
Older Adults ◽  
Resistance Training ◽  
Upper Limb ◽  
Postural Tremor ◽  
Force Steadiness

scholarly journals Force Steadiness during Submaximal Isometric Plantar and Dorsiflexion in Resistance Training: Experienced vs Non-experienced Individuals

2021 ◽  
Vol 34 ◽  
pp. 5-13
Author(s):  
Konstantinos Salonikidis ◽  
Konstantinos Papageorgiou ◽  
Anastasios Meliadis ◽  
Fotini Arabatzi
Keyword(s):  
Resistance Training ◽  
Force Steadiness

scholarly journals The effects of forearm position and contraction intensity on cortical and spinal excitability during a submaximal force steadiness task of the elbow flexors

2020 ◽  
Vol 123 (2) ◽  
pp. 522-528
Author(s):  
Alexandra F. Yacyshyn ◽  
Samantha Kuzyk ◽  
Jennifer M. Jakobi ◽  
Chris J. McNeil
Keyword(s):  
Evoked Potential ◽  
Biceps Brachii ◽  
Cortical Excitability ◽  
Motor Evoked Potential ◽  
Elbow Flexor ◽  
Elbow Flexors ◽  
Neural Excitability ◽  
Force Steadiness ◽  
Maximal Force ◽  
Spinal Excitability

Elbow flexor force steadiness is less with the forearm pronated (PRO) compared with neutral (NEU) or supinated (SUP) and may relate to neural excitability. Although not tested in a force steadiness paradigm, lower spinal and cortical excitability was observed separately for biceps brachii in PRO, possibly dependent on contractile status at the time of assessment. This study aimed to investigate position-dependent changes in force steadiness as well as spinal and cortical excitability at a variety of contraction intensities. Thirteen males (26 ± 7 yr; means ± SD) performed three blocks (PRO, NEU, and SUP) of 24 brief (~6 s) isometric elbow flexor contractions (5, 10, 25 or 50% of maximal force). During each contraction, transcranial magnetic stimulation or transmastoid stimulation was delivered to elicit a motor-evoked potential (MEP) or cervicomedullary motor-evoked potential (CMEP), respectively. Force steadiness was lower in PRO compared with NEU and SUP ( P ≤ 0.001), with no difference between NEU and SUP. Similarly, spinal excitability (CMEP/maximal M wave) was lower in PRO than NEU (25 and 50% maximal force; P ≤ 0.010) and SUP (all force levels; P ≤ 0.004), with no difference between NEU and SUP. Cortical excitability (MEP/CMEP) did not change with forearm position ( P = 0.055); however, a priori post hoc testing for position showed excitability was 39.8 ± 38.3% lower for PRO than NEU at 25% maximal force ( P = 0.006). The data suggest that contraction intensity influences the effect of forearm position on neural excitability and that reduced spinal and, to a lesser extent, cortical excitability could contribute to lower force steadiness in PRO compared with NEU and SUP. NEW & NOTEWORTHY To address conflicting reports about the effect of forearm position on spinal and cortical excitability of the elbow flexors, we examine the influence of contraction intensity. For the first time, excitability data are considered in a force steadiness context. Motoneuronal excitability is lowest in pronation and this disparity increases with contraction intensity. Cortical excitability exhibits a similar pattern from 5 to 25% of maximal force. Lower corticospinal excitability likely contributes to relatively poor force steadiness in pronation.

Force steadiness, muscle activity, and maximal muscle strength in subjects with subacromial impingement syndrome

2006 ◽  
Vol 34 (5) ◽  
pp. 631-639 ◽  
Author(s):  
Thomas Bandholm ◽  
Lars Rasmussen ◽  
Per Aagaard ◽  
Bente Rona Jensen ◽  
Louise Diederichsen
Keyword(s):  
Muscle Strength ◽  
Muscle Activity ◽  
Impingement Syndrome ◽  
Subacromial Impingement Syndrome ◽  
Subacromial Impingement ◽  
Force Steadiness ◽  
Maximal Muscle Strength
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