Effects of age on muscle power, postural control and functional capacity after short-term immobilization and retraining
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Effects of age on muscle power, postural control and functional capacity after short-term immobilization and retraining. / Elam, Cecilia; Hvid, Lars G; Christensen, Ulrik; Kjær, Michael; Magnusson, S Peter; Aagaard, Per; Bunketorp Käll, Lina; Suetta, Charlotte.
In: Journal of Musculoskeletal Neuronal Interactions, Vol. 22, No. 4, 2022, p. 486-497.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Effects of age on muscle power, postural control and functional capacity after short-term immobilization and retraining
AU - Elam, Cecilia
AU - Hvid, Lars G
AU - Christensen, Ulrik
AU - Kjær, Michael
AU - Magnusson, S Peter
AU - Aagaard, Per
AU - Bunketorp Käll, Lina
AU - Suetta, Charlotte
PY - 2022
Y1 - 2022
N2 - OBJECTIVES: This study investigated the effect of lower limb immobilization and retraining on postural control and muscle power in healthy old and young men.METHODS: Twenty men, nine old (OM:67.3±4.4 years) and eleven young (YM:24.4±1.6 years) underwent 2 weeks of unilateral whole-leg casting, followed by 4 weeks of retraining. Measures included center of pressure (CoP) sway length and area during single- and double-leg stance, maximal leg extensor muscle power, habitual and maximal 10-m gait speed, sit-to-stand performance, and 2-min step test.RESULTS: After immobilization, leg extension muscle power decreased by 15% in OM (from 2.68±0.60 to 2.29±0.63 W/kg, p<0.05) and 17% in YM (4.37±0.76 to 3.63±0.69 W/kg, p<0.05). Double-leg CoP sway area increased by 45% in OM (218±82 to 317±145 mm2; p<0.05), with no change in YM (p=0.43). Physical function did not change after immobilization but sit-to-stand performance (+20%, p<0.05) and 2-min step test (+28%, p<0.05) increased in OM following retraining. In both groups, all parameters returned to baseline levels after retraining.CONCLUSION: Two weeks of lower limb immobilization led to decreases in maximal muscle power in both young and old, whereas postural control was impaired selectively in old men. All parameters were restored in both groups after 4 weeks of resistance-based retraining.
AB - OBJECTIVES: This study investigated the effect of lower limb immobilization and retraining on postural control and muscle power in healthy old and young men.METHODS: Twenty men, nine old (OM:67.3±4.4 years) and eleven young (YM:24.4±1.6 years) underwent 2 weeks of unilateral whole-leg casting, followed by 4 weeks of retraining. Measures included center of pressure (CoP) sway length and area during single- and double-leg stance, maximal leg extensor muscle power, habitual and maximal 10-m gait speed, sit-to-stand performance, and 2-min step test.RESULTS: After immobilization, leg extension muscle power decreased by 15% in OM (from 2.68±0.60 to 2.29±0.63 W/kg, p<0.05) and 17% in YM (4.37±0.76 to 3.63±0.69 W/kg, p<0.05). Double-leg CoP sway area increased by 45% in OM (218±82 to 317±145 mm2; p<0.05), with no change in YM (p=0.43). Physical function did not change after immobilization but sit-to-stand performance (+20%, p<0.05) and 2-min step test (+28%, p<0.05) increased in OM following retraining. In both groups, all parameters returned to baseline levels after retraining.CONCLUSION: Two weeks of lower limb immobilization led to decreases in maximal muscle power in both young and old, whereas postural control was impaired selectively in old men. All parameters were restored in both groups after 4 weeks of resistance-based retraining.
KW - Male
KW - Humans
KW - Postural Balance
KW - Lower Extremity
KW - Leg
KW - Walking Speed
KW - Muscle, Skeletal
M3 - Journal article
C2 - 36458386
VL - 22
SP - 486
EP - 497
JO - Journal of Musculoskeletal Neuronal Interactions
JF - Journal of Musculoskeletal Neuronal Interactions
SN - 1108-7161
IS - 4
ER -
ID: 345604789