Skeletal muscle remodeling in response to alpine skiing training in older individuals.

Abstract:

:This study investigated whether regular alpine skiing could reverse sarcopenia and muscle weakness in older individuals. Twenty-two older men and women (67 ± 2 years) underwent 12 weeks of recreational skiing, two to three times a week, each session lasting ∼ 3.5 h. An age-matched, inactive group (n=20, 67 ± 4 years) served as a control (CTRL). Before and after the training period, knee extensors muscle thickness (T(m) ), pennation angle (θ) and fascicle length (L(f) ) of the vastus lateralis muscle were measured by ultrasound. Maximum isokinetic knee extensor torque (MIT) at an angular velocity of 60°/s was measured by dynamometry. After the training, T(m) increased by 7.1% (P<0.001), L(f) by 5.4% (P<0.02) and θ by 3.4% (P<0.05). The increase in T(m) was matched by a significant gain in MIT (13.3%, P<0.001). No significant changes, except for a decrease in θ (2.1%, P<0.02), were found in the CTRL group. The gain in T(m) in the training group correlated significantly with an increase in the focal adhesion kinase content, pointing to a primary role of this mechano-sensitive protein in sarcomere remodeling with muscle hypertrophy. Overall, the results show that alpine skiing is an effective intervention for combating sarcopenia and weakness in old age.

journal_name

Scand J Med Sci Sports

authors

Narici MV,Flueck M,Koesters A,Gimpl M,Reifberger A,Seynnes OR,Niebauer J,Rittweger J,Mueller E

doi

10.1111/j.1600-0838.2011.01338.x

subject

Has Abstract

pub_date

2011-08-01 00:00:00

pages

23-8

eissn

0905-7188

issn

1600-0838

journal_volume

21 Suppl 1

pub_type

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