| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Department of Kinesiology and Applied Physiology, University of Colorado, Boulder, Colorado 80309; 2 Department of Physiology, University of Arizona, Tucson, Arizona 85721; and 3 Department of Sport Sciences, Waseda University, Tokorozawa, Japan 359-1192
When old adults participate in a strength-training program with heavy loads, they experience an increase in muscle strength and an improvement in the steadiness of submaximal isometric contractions. The purpose of this study was to determine the effect of light- and heavy-load strength training on the ability of old adults to perform steady submaximal isometric and anisometric contractions. Thirty-two old adults (60-91 yr) participated in a 4-wk training program of a hand muscle. Both the light- and heavy-load groups increased one-repetition maximum and maximal voluntary contraction (MVC) strength and experienced similar improvements in the steadiness of the isometric and shortening and lengthening contractions. The increase in MVC strength was greater for the heavy-load group and could not be explained by changes in muscle activation. Before training, the lengthening contractions were less steady than the shortening contractions with the lightest loads (10% MVC). After training, there was no difference in steadiness between the shortening and lengthening contractions, except with the lightest load. These improvements were associated with a reduced level of muscle activation, especially during the lengthening contractions.
aging; first dorsal interosseus; finger movement; tremor
This article has been cited by other articles:
|
|
 |
|
  C. J. De Luca, J. A. Gonzalez-Cueto, P. Bonato, and A. Adam Motor Unit Recruitment and Proprioceptive Feedback Decrease the Common Drive J Neurophysiol, March 1, 2009; 101(3): 1620 - 1628. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. T. Schroeder, Y. Wang, C. Castaneda-Sceppa, G. Cloutier, A. F. Vallejo, M. Kawakubo, N. E. Jensky, S. Coomber, S. P. Azen, and F. R. Sattler Reliability of Maximal Voluntary Muscle Strength and Power Testing in Older Men J. Gerontol. A Biol. Sci. Med. Sci., May 1, 2007; 62(5): 543 - 549. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. W. Kornatz, E. A. Christou, and R. M. Enoka Practice reduces motor unit discharge variability in a hand muscle and improves manual dexterity in old adults J Appl Physiol, June 1, 2005; 98(6): 2072 - 2080. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. T. Moritz, B. K. Barry, M. A. Pascoe, and R. M. Enoka Discharge Rate Variability Influences the Variation in Force Fluctuations Across the Working Range of a Hand Muscle J Neurophysiol, May 1, 2005; 93(5): 2449 - 2459. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. K. Barry and R. G. Carson The Consequences of Resistance Training for Movement Control in Older Adults J. Gerontol. A Biol. Sci. Med. Sci., July 1, 2004; 59(7): M730 - M754. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. L. Tracy, W. C. Byrnes, and R. M. Enoka Strength training reduces force fluctuations during anisometric contractions of the quadriceps femoris muscles in old adults J Appl Physiol, April 1, 2004; 96(4): 1530 - 1540. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Shinohara, Y. Yoshitake, M. Kouzaki, H. Fukuoka, and T. Fukunaga Strength training counteracts motor performance losses during bed rest J Appl Physiol, October 1, 2003; 95(4): 1485 - 1492. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. M. Taylor, E. A. Christou, and R. M. Enoka Multiple Features of Motor-Unit Activity Influence Force Fluctuations During Isometric Contractions J Neurophysiol, August 1, 2003; 90(2): 1350 - 1361. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. A. Christou, Y. Yang, and K. S. Rosengren Rapid Communication. Taiji Training Improves Knee Extensor Strength and Force Control in Older Adults J. Gerontol. A Biol. Sci. Med. Sci., August 1, 2003; 58(8): M763 - 766. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. C. LaStayo, G. A. Ewy, D. D. Pierotti, R. K. Johns, and S. Lindstedt The Positive Effects of Negative Work: Increased Muscle Strength and Decreased Fall Risk in a Frail Elderly Population J. Gerontol. A Biol. Sci. Med. Sci., May 1, 2003; 58(5): M419 - 424. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Shinohara, K. G. Keenan, and R. M. Enoka Contralateral activity in a homologous hand muscle during voluntary contractions is greater in old adults J Appl Physiol, March 1, 2003; 94(3): 966 - 974. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. L. Tracy and R. M. Enoka Older adults are less steady during submaximal isometric contractions with the knee extensor muscles J Appl Physiol, March 1, 2002; 92(3): 1004 - 1012. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. A. Christou and L. G. Carlton Old Adults Exhibit Greater Motor Output Variability Than Young Adults Only During Rapid Discrete Isometric Contractions J. Gerontol. A Biol. Sci. Med. Sci., December 1, 2001; 56(12): B524 - 532. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. T. Noteboom, K. R. Barnholt, and R. M. Enoka Activation of the arousal response and impairment of performance increase with anxiety and stressor intensity J Appl Physiol, November 1, 2001; 91(5): 2093 - 2101. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. T. Noteboom, M. Fleshner, and R. M. Enoka Activation of the arousal response can impair performance on a simple motor task J Appl Physiol, August 1, 2001; 91(2): 821 - 831. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Hortobágyi, D. Tunnel, J. Moody, S. Beam, and P. DeVita Low- or High-Intensity Strength Training Partially Restores Impaired Quadriceps Force Accuracy and Steadiness in Aged Adults J. Gerontol. A Biol. Sci. Med. Sci., January 1, 2001; 56(1): 38B - 47. [Abstract] [Full Text]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| Visit Other APS Journals Online |
