Improved Muscle Strength and Power in Elderly Exercising Regularly

Abstract

Since the number of elderly people with a sedentary lifestyle is considerable and still growing, regular exercise could be an extra stimulant to compensate for the decrease in functional capacities. The potential positive effects of physical and sporting activities (PSA) on muscular function in relation to the period of practice were studied. Muscular strength and power were evaluated by dynamometric knee and ankle tests on 40 healthy subjects aged over 60 years old, split into four groups according to the period of practice. Higher muscular performance was obtained in subjects who had always practised PSA, whereas subjects who had always been inactive displayed the worst muscular performances. Subjects who had begun PSA practice lately had good muscular strength and power, close to those of the AA group, whereas the subjects who had stopped the practice at an early age did not perform as well. Life-long PSA attenuates the age-related loss of muscle function, and initiation at old age improves it. This, and the absence of any beneficial effects of PSA stopped when young, indicates that the actual activity level is an important determinant of skeletal muscle function at old age. Practicing PSA increases muscular strength and power and thus improves daily living activities in elderly people.

Key words

Muscular strength and power - elderly - physical and sporting activities - period of activity

References

• 1 Agre J C, Pierce L E, Raab D M, McAdams M, Smith E L. Light resistance and stretching exercise in elderly women: Effect upon strength.  Arch Phys Med Rehabil. 1988;  69 273-276
• 2 Aniansson A, Gustafsson E. Physical training in elderly man with special reference to quadriceps muscle and morphology.  Clin Physiol. 1981;  7 87-98
• 3 Bassey E J, Bendall M J, Pearson M. Muscle strength in the triceps surae and objectively measured customary walking activity in men and women over 65 years of age.  Clin Sci. 1988;  74 85-89
• 4 Bassey E J, Fiatarone M A, O’Neill E F, Kelley M, Evans W J, Lipsitz L A. Leg extensor power and functional performance in very old men and women.  Clin Sci. 1992;  82 321-327
• 5 Bemben M G, Massey B H, Bemben D A, Misner J E, Boileau R A. Isometric force production as a function of age in healthy 20- to 74-yr-old men.  Med Sci Sports Exerc. 1991;  23 1302-1310
• 6 Bonnefoy M, Kostka T, Arsac L M, Berthouze S, Lacour J M. Different determinants of peak anaerobic power in elderly men.  Eur J Appl Physiol. 1998;  77 182-188
• 7 Brooks S V, Faulkner J A. Maximum and sustained power of extensor digitorium longus muscles from young, adult and old mice.  J Gerontol. 1991;  46 B28-33
• 8 Buchner D M, Cress M E, de Lateur B J, Wagner E H. Variability in the effect of strength training on skeletal muscle strength in older adults. In: Albarede JL, Garry PJ, Vellas P (eds) L’Année Gérontologique. Volume 7 Paris; Serdi Publishers 1993: 229-239
• 9 Campbell A J, Robertson M C, Gardner M M, Norton R N, Tilyard M W, Buchner D M. Randomised control trial of a general practice programme of home-based exercise to prevent falls in elderly women.  Br Med J. 1997;  315 1065-1069
• 10 Doherty T J, Brown W F. The estimated numbers and relative sizes of thenar motor units as selected by multiple point stimulation in young and older adults.  Muscle Nerve. 1993;  16 355-366
• 11 Era P, Heikkinen E. Postural sway during standing and unexpected disturbance of balance in random samples of men of different ages.  J Gerontol. 1985;  40 287-295
• 12 Fiatarone M A, Marks E C, Ryan N D, Meredith C N, Lipsitz L A, Evans W J. High-intensity strength training in nonagenarians.  JAMA. 1990;  263 3029-3034
• 13 Fiatarone M A, O’Neill E F, Ryan N D, Clements K M, Solares G R, Nelson M E, Roberts S B, Kehayias J J, Lipsitz L A, Evans W J. Exercise training and nutritional supplementation for physical frailty in very elderly people.  New Engl J Med. 1994;  330 1769-1775
• 14 Fitts R H, Troup J P, Witzman F A, Holloszy J O. The effect of aging and exercise on skeletal muscle function.  Mech Ageing Dev. 1984;  27 161-172
• 15 Frontera W R, Meredith C N, O’Reilly K P, Knuttgen H G, Evans W J. Strength conditioning in older men: Skeletal muscle hypertrophy and improved function.  J Appl Physiol. 1988;  64 1038-1044
• 16 Gauchard G C, Jeandel C, Tessier A, Perrin P hP. Beneficial effect of proprioceptive physical activities on balance control in elderly human subjects.  Neurosci Lett. 1999;  273 81-84
• 17 Grimby G, Aniansson A, Zetterberg C, Saltin B. Is there a change in relative muscle fiber composition with age?.  Clin Physiol. 1984;  4 189-194
• 18 Horak F B, Nashner L M. Central programming of postural movements: adaptation to altered support-surface configurations.  J Neurophysiol. 1986;  55 1369-1381
• 19 Hurley B F. Age, gender, and muscular strength.  J Gerontol. 1995;  50A (sp issue) 41-44
• 20 Judge J O, Davis R B, Ounpuu S. Step length reductions in advanced age: the role of ankle and hip kinetics.  J Gerontol. 1996;  51 M303-312
• 21 Kirkendall D T, Garrett W E. The effects of aging and training on skeletal muscle.  Am J Sports Med. 1998;  26 598-602
• 22 Lexell J. Human aging, muscle mass, and fiber type composition.  J Gerontol. 1995;  50A (sp issue) 11-16
• 23 Lord S R, Castell S. Physical activity program for older persons: effects on balance, strength, neuromuscular control, and reaction time.  Arch Phys Med Rehabil. 1994;  75 648-652
• 24 Perrin P hP, Gauchard G C, Perrot C, Jeandel C. Effects of physical and sporting activities on balance control in elderly people.  Br J Sports Med. 1999;  33 121-126
• 25 Sandler R B, Burdett R, Zaleskiewicz M, Sprowls-Repcheck C, Harwell M. Muscle strength as an indicator of physical activity.  Med Sci Sports Exerc. 1991;  23 1375-1381
• 26 Stalberg E, Borges O, Ericsson M, Esses-Gustavsson B, Fawcett P RW, Nordesjo L LO, Nordgren B, Uhlin R. The quadriceps femoris muscle in 20-70-year-old subjects: Relationship between knee extension torque, electrophysiological parameters, and muscle fiber characteristics.  Muscle Nerve. 1989;  12 382-389
• 27 Tomonaga M. Histochemical and ultrastructural changes in senile human skeletal muscle.  J Am Geriatr Soc. 1977;  25 125-131
• 28 Tzankoff S P, Norris A H. Longitudinal changes in basal metabolic rate in man.  J Appl Physiol. 1978;  33 536-539
• 29 Whipple R H, Wolfson L I, Amerman P M. The relationship of knee and ankle weakness to falls in nursing home residents: An isokinetic study.  J Am Geriatr Soc. 1987;  35 13-20
• 30 Wolfson L, Whipple R, Derby C, Judge J, King M, Amerman P, Schmidt J, Smyers D. Balance and strength training in older adults: intervention gains and Tai Chi maintenance.  J Am Geriatr Soc. 1996;  44 498-506
• 31 Woollacott M H. Systems contributing to balance disorders in older adults.  J Gerontol. 2000;  55A M424-428