Neuromuscular characteristics in trained vs. sedentary male adults with intellectual disability.
J Intellect Disabil Res
; 63(11): 1334-1345, 2019 11.
Article
in En
| MEDLINE
| ID: mdl-31342612
ABSTRACT
BACKGROUND:
This study aimed to explore muscle strength production and its underlying neuromuscular characteristics in sedentary and trained individuals with intellectual disability (ID) compared with healthy sedentary individuals.METHODS:
Three adult groups (age 25.07 ± 0.70) consisting of sedentary individuals with ID (IDSG), trained individuals with ID (IDTG) and a control group (CONT) participated in the present study. Peak torque (PT) during maximal voluntary isometric contraction, voluntary activation level (VAL), surface electromyography (sEMG) recordings, electrophysiological (Mmax ) and potentiated twitch torque (PTT responses) of the knee extensor muscles and thigh muscle volume were assessed.RESULTS:
Compared with CONT and IDTG, respectively, IDSG presented significantly lower PT (-48% and -42%), VAL (-24% and -9%), sEMG (-49% and -29%), Mmax (-41% and -39%) and PTT (-32% and -28%) values. These deficits were reduced between IDTG compared with CONT (i.e. PT -10%; VAL -16%; and sEMG -28%) or did not differ anymore (PTT and Mmax ). Normalising PT to thigh muscle volume and/or computing theoretical PT value overwhelm strength production differences between IDTG and CONT. Training background influences the outcomes with IDTG exhibiting greater PT, VAL, sEMG, Mmax and PTT than IDSG.CONCLUSIONS:
Strength production deficit in IDSG was related to both muscular and neural characteristics compared with healthy controls whereas this deficit mainly arises from neural characteristics for IDTG.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Exercise
/
Muscle Strength
/
Electrophysiological Phenomena
/
Sedentary Behavior
/
Isometric Contraction
/
Intellectual Disability
Limits:
Adult
/
Humans
/
Male
Language:
En
Journal:
J Intellect Disabil Res
Journal subject:
TRANSTORNOS MENTAIS
Year:
2019
Document type:
Article
Affiliation country:
France