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Muscles adaptation to aging and training: architectural changes – a randomised trial

Authors
  • Létocart, Adrien J.1
  • Mabesoone, Franck2
  • Charleux, Fabrice3
  • Couppé, Christian4, 5
  • Svensson, René B.4, 5
  • Marin, Frédéric1
  • Magnusson, S. Peter4, 5
  • Grosset, Jean-François1
  • 1 Sorbonne Universités, Biomécanique et Bioingénierie, Université de Technologie de Compiègne, UMR CNRS 7338, Compiègne, France , Compiègne (France)
  • 2 Centre Hospitalier COMPIÈGNE-NOYON, Compiègne, France , Compiègne (France)
  • 3 ACRIM-Polyclinique Saint Côme, Compiègne, France , Compiègne (France)
  • 4 Institute of Sports Medicine Copenhagen / Dept of Physical Therapy, Bispebjerg Hospital, Copenhagen, Denmark , Copenhagen (Denmark)
  • 5 University of Copenhagen, Copenhagen, Denmark , Copenhagen (Denmark)
Type
Published Article
Journal
BMC Geriatrics
Publisher
BioMed Central
Publication Date
Jan 13, 2021
Volume
21
Issue
1
Identifiers
DOI: 10.1186/s12877-020-02000-0
Source
Springer Nature
Keywords
License
Green

Abstract

BackgroundTo investigate how anatomical cross-sectional area and volume of quadriceps and triceps surae muscles were affected by ageing, and by resistance training in older and younger men, in vivo.MethodsThe old participants were randomly assigned to moderate (O55, n = 13) or high-load (O80, n = 14) resistance training intervention (12 weeks; 3 times/week) corresponding to 55% or 80% of one repetition maximum, respectively. Young men (Y55, n = 11) were assigned to the moderate-intensity strengthening exercise program. Each group received the exact same training volume on triceps surae and quadriceps group (Reps x Sets x Intensity). The fitting polynomial regression equations for each of anatomical cross-sectional area-muscle length curves were used to calculate muscle volume (contractile content) before and after 12 weeks using magnetic resonance imaging scans.ResultsOnly Rectus femoris and medial gastrocnemius muscle showed a higher relative anatomical cross-sectional area in the young than the elderly on the proximal end. The old group displayed a higher absolute volume of non-contractile material than young men in triceps surae (+ 96%). After training, Y55, O55 and O80 showed an increase in total quadriceps (+ 4.3%; + 6.7%; 4.2% respectively) and triceps surae (+ 2.8%; + 7.5%; 4.3% respectively) volume. O55 demonstrated a greater increase on average gains compared to Y55, while no difference between O55 and O80 was observed.ConclusionsMuscle loss with aging is region-specific for some muscles and uniform for others. Equivalent strength training volume at moderate or high intensities increased muscle volume with no differences in muscle volume gains for old men. These data suggest that physical exercise at moderate intensity (55 to 60% of one repetition maximum) can reverse the aging related loss of muscle mass.Trial registrationNCT03079180 in ClinicalTrials.gov. Registration date: March 14, 2017.

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