Intermittently increased repetitive work intensity and neuromuscular function in the cold.

Abstract:

:This study evaluated whether cold-induced deterioration in neuromuscular function can be restored by intermittently increasing the workload. We examined the level of muscular strain, agonist-antagonist co-activation, the occurrence of EMG gaps and neuromuscular efficiency in wrist flexor and extensor muscles at 21°C (TN) and 4°C (C(10)) with a 10%MVC workload. During second exposure to 4°C (C(50)) the workload was increased every fourth minute to 50%MVC. The results indicated that muscular strain and co-activation was the highest and the amount of EMG gaps and neuromuscular efficiency the lowest at C(10). By intermittently increasing the workload at C(50) we were able to reduce muscular strain and co-activation (p<0.05) and induce a trend like increase in EMG gaps and enhance neuromuscular efficiency in relation to C(10) (NS). It may be concluded that intermittently increasing the workload, i.e. breaking the monotonous work cycle was able to partially restore neuromuscular function.

journal_name

Ind Health

journal_title

Industrial health

authors

Oksa J,Paasovaara S,Ollila T

doi

10.2486/indhealth.ms1262

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

307-15

issue

4

eissn

0019-8366

issn

1880-8026

pii

DN/JST.JSTAGE/indhealth/MS1262

journal_volume

50

pub_type

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