Muscle strength, volume and activation following 12-month resistance training in 70-year-old males
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In elderly males muscle plantar flexor maximal voluntary contraction (MVC) torque normalised to muscle volume (MVC/VOL) is reduced compared to young males as a result of incomplete muscle activation in the elderly. The aim of the present study was to determine the influence of a 12-month resistance training programme on muscle volume, strength, MVC/VOL, agonist activation and antagonist coactivation of the plantarfexors in elderly males. Thirteen elderly males aged 70 years and over (range 70–82 years), completed a 12-month whole body resistance-training programme (TRN), training three times a week. Another eight males (range 18–30 years), who maintained their habitual physical activity for the same 12-month period as the TRN group acted as controls (CTRL). Isometric plantarflexor maximal voluntary contraction (MVC) torque increased in the TRN group by 20% (P<0.01), from 113.1±22.0 Nm to 141.5±19.2 Nm. Triceps surae volume (TS VOL) assessed using MRI, increased by 12%, from 796.3±78.9 cm3 to 916.8±144.4 cm3 . PF activation, measured using supramaximal double twitch interpolation, increased from 83.6±11.0% pre training, to 92.1±7.6% post training (P<0.05). Dorsiflexion MVC and antagonist coactivation (assessed using surface electromyography) did not change with training. Plantarflexor MVC torque normalized for triceps surae muscle volume (MVC/VOL) was 142.6±32.4 kN m−2 before training and 157.0± 27.9 kN m−2 after training (a non-significant increase of 8%). No significant change in any measurement was observed in the CTRL group. This study has shown that the gain in muscle strength in response to long-term (12-month) training in older men is mostly accounted for by an increased muscle volume and activation.
KeywordsAgeing Resistance training Plantarflexion Strength
Supported by European Commission Framework V funding (‘Better-Ageing’ Project, No. QLRT-2001-00323).
- Borg GA (1982) Psychophysical bases of perceived exertion. Med Sci Sport Exer 14:377–381Google Scholar
- Bruce SA, Newton D, Woledge RC (1989) Effect of age on voluntary force and cross-sectional area of human adductor pollicis muscle. Quart J Exp Physiol 74:359–362Google Scholar
- Buchner DM, Cress ME, Esselman PC, Margherita AJ, de Lateur BJ, Campbell AJ, Wagner EH (1996) Factors associated with changes in gait speed in older adults. J Gerontol Ser A-Biol Sci Med Sci 51:M297–M302Google Scholar
- Hakkinen K (1994) Neuromuscular adaptation during strength training, aging, detraining, and immobilisation. Crit Rev Phy Rehabil Med 6:161–198Google Scholar
- Morse CI, Thom JM, Birch KM, Narici MV (2005b) Changes in triceps surae architecture with sarcopenia. Acta Physiol Scand 183:194–199Google Scholar
- Sale DG (1988) Neural adaptation to resistance training. Med Sci Sport Exer 20:S135-S145Google Scholar
- Skelton DA, Young A, Greig CA, Malbut KE (1995) Effects of resistance training on strength, power, and selected functional abilities of women aged 75 and older. J Amer Geriatric Soc 43:1081–1087Google Scholar
- Stackhouse SK, Stevens JE, Lee SC, Pearce KM, Snyder-Mackler L, Binder-Macleod SA (2001) Maximum voluntary activation in nonfatigued and fatigued muscle of young and elderly individuals. Phys Therap 81:1102–1109Google Scholar
- Young A, Stokes M, Crowe M (1985) The size and strength of the quadriceps muscles of old and young men. Clinic Physiol 5:145–154Google Scholar
- Yue GH, Ranganathan VK, Siemionow V, Liu JZ, Sahgal V (1999) Older adults exhibit a reduced ability to fully activate their biceps brachii muscle. J Gerontol Ser A Biol Sci Med Sci 54:M249–M253Google Scholar