CoChat
Sign Up
Cited by 342Sports Performance and TrainingCardiovascular and exercise physiologyMuscle activation and electromyography studies

The DOI matches its Crossref record; 66 of the 66 references it cites were found in a registry or an index.

Maximal strength and power characteristics in isometric and dynamic actions of the upper and lower extremities in middle-aged and older men

Open access
Izquierdo, Ibañez, Gorostiaga, Garrues, Zúñiga, Antón, Larrión, Häkkinen·1999·Acta Physiologica Scandinavica
DOI 10.1046/j.1365-201x.1999.00590.x
Open this paper in CoChat — free accountOpen PDF

Abstract

Muscle cross‐sectional area of the quadriceps femoris (CSA QF ), maximal isometric strength (handgrip test and unilateral knee extension/flexion), the shape of isometric force–time curves, and power–load curves during concentric and stretch–shortening cycle (SSC) actions with loads ranging from 15 to 70% of one repetition maximum half‐squat (1RM HS ) and bench‐press (1RM BP ) were examined in 26 middle‐aged men in the 40‐year‐old (M40) (mean age 42, range 35–46) and 21 elderly men in the 65‐year‐old age group (M65) (mean age 65, range 60–74). Maximal bilateral concentric (1RM HS and 1RM BP ), unilateral knee extension (isometric; MIF KE and concentric; 1RM KE ) strength and muscle CSA in M65 were lower ( P < 0.001) than in M40. The individual values of the CSA QF correlated with the individual values of maximal concentric 1RM HS , 1RM KE and MIF KE in M65, while the corresponding correlations were lower in M40. The maximal MIF KE value per CSA of 4.54 ± 0.7 N m cm –2 in M40 was greater ( P < 0.05–0.01) than that of 4.02 ± 0.7 N m cm –2 recorded in M65. The maximal rate of force development of the knee extensors and flexors in M65 was lower ( P < 0.01–0.001) and the heights in squat and counter‐movement jumps as much as 27–29% lower ( P < 0.001) than those recorded in M40. M65 showed lower ( P < 0.001) concentric power values for both upper and lower extremity performances than those recorded for M40. Maximal power output was maximized at the 30–45% loads for the upper extremity and at the 60–70% loads for the lower extremity extensors in both age groups. Muscle activation of the antagonists was significantly higher ( P < 0.01–0.001) during the isometric and dynamic knee extension actions in M65 than in M40. The present results support a general concept that parallel declines in muscle mass and maximal strength take place with increasing age, although loss of strength may vary in both lower and upper extremity muscles in relation to the type of action and that ageing may also lead to a decrease in voluntary neural drive to the muscles. Explosive strength and power seem to decrease with increasing age even more than maximal isometric strength in both actions but power was maximized at the 30–45% loads for the upper and at the 60–70% loads for the lower extremity action in both age groups. High antagonist muscle activity may limit the full movement efficiency depending on the type of muscle action, testing conditions and the velocity and/or the time duration of the action, especially in the elderly.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1046/j.1365-201x.1999.00590.x

Cites

66 of 66 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 66 references

Research works printed but not linked: 3

  1. Bosco, C. & Komi, P.V. 1982. Muscle elasticity in athletes. In: P.V. Komi (ed.) Exercise and Sport Biology, pp. 109±117. Human Kinetics, Champaign.
  2. Enoka, R., Fuglevand, A. & Barreto, P. 1992. Age does not impair the voluntary ability to maximal activate muscle. In: L. Draganich, R. Wells, J. Bechtold (eds) The Proceedings of the Second North American Congress in Biomechanics, pp.
  3. Faulkner, J.A., Cla¯in, D.R. & McCully, K.K. 1986. Power output of fast and slow ®bers from human skeletal muscles. In: N.L. Jones et al. (eds) Human muscle power, pp. 81±94. Human Kinetics Publishers, Champaign, Ill.

Cited by

Sorted by citations

Related

See all

Metadata

Authors
Izquierdo, Ibañez, Gorostiaga, Garrues, Zúñiga, Antón, Larrión, & Häkkinen
Affiliations
  • Gobierno de Navarra (ES)
  • Servicio Navarro de Salud (ES)
  • University of Jyväskylä (FI)
Venue
Acta Physiologica Scandinavica
Publisher
Wiley
Published
1999-09
Volume
167
Issue
1
Pages
57-68
ISSN
  • 0001-6772 (ISSN-L)
  • 1365-201X
DOI
10.1046/j.1365-201x.1999.00590.x
OpenAlex
W2138743968
Cited by
342
References
66
Citations by year
2026: 2 · 2025: 5 · 2024: 6 · 2023: 10 · 2022: 17 · 2021: 15 · 2020: 12 · 2019: 19 · 2018: 18 · 2017: 14 · 2016: 17 · 2015: 13 · 2014: 15 · 2013: 16 · 2012: 19
FWCI
3.74
Type
journal article
Language
en
Open access
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor, 845 d)
Locations
  • Acta Physiologica Scandinavica (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
  • Physical Sciences › Engineering › Biomedical Engineering › Muscle activation and electromyography studies
Keywords
maximal strength, muscle power, aging, middle-aged men, older men, isometric strength, rate of force development, stretch-shortening cycle, half squat, bench press, knee extension, knee flexion, countermovement jump, antagonist muscle activation, muscle fatigue, muscle fiber composition, muscle fiber cross-sectional area
MeSH terms
Adult, Aged, Aging, Arm, Biomechanical Phenomena, Humans, Leg, Male, Middle Aged, Muscle Contraction

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review