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Cited by 142Sports Performance and TrainingCardiovascular and exercise physiologyHormonal and reproductive studies

The DOI matches its Crossref record; 41 of the 41 references it cites were found in a registry or an index.

Maximal strength and power, endurance performance, and serum hormones in middle-aged and elderly men

IZQUIERDO, MIKEL, H??KKINEN, KEIJO, ANT??N, ALAZNE, GARRUES, MIRIAM, IBA??EZ, JAVIER, RUESTA, MAITE, GOROSTIAGA, ESTEBAN M.·2001·Medicine & Science in Sports & Exercise
DOI 10.1097/00005768-200109000-00022
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Abstract

PURPOSE: To examine maximal strength, power and muscle cross-sectional area, maximal and submaximal cycling endurance characteristics, and serum hormone concentrations of testosterone (T), free testosterone (FT), and cortisol (C) in middle-aged and elderly men. METHODS: Maximal knee extension force (isometric; MIF(KE)), power-load curves during concentric actions with loads ranging from 15% to 70% of 1 RM half-squat (1RM(HS)), muscle cross-sectional area of quadriceps femoris (CSA(QF)), workload, heart rate and lactate accumulation during incremental cycling, and serum hormone concentrations were measured in 26 middle-aged (M42 yr) and 21 elderly men (M65 yr). RESULTS: The 1RM(HS) (14%), MIF(KE) (24%) and CSA(QF) (13%) were lower in M65 than in M42 (P < 0.05-0.01). Power during submaximal actions was lower (P < 0.05-0.001) in M65 than in M42, but the differences disappeared when expressed relative to CSA(QF). Serum FT was in M42 higher (P < 0.05) than in M65. Maximal workload, maximal heart rate and peak blood lactate during cycling in M65 were 31%, 11%, and 20% lower than in M42 (P < 0.01). During submaximal cycling blood lactate rose more rapidly with increasing workload in M65 than in M42 (P < 0.05-0.01), but the differences disappeared when expressed relative to CSA(QF). Significant correlations existed between individual values of serum FT:C ratio, C and T, and those of muscle strength and maximal workload. CONCLUSION: Declines in maximal strength, muscle mass, and endurance performance seem to take place with increasing age, although muscle power and demand for aerobic energy per unit of muscle tissue during submaximal loads remain similar. The balance between anabolic and catabolic hormones in aging people over the years may be associated with age-related decreased strength and declines in maximal cycling workload.

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Crossref · 10.1097/00005768-200109000-00022

Cites

41 of 41 references verified0 citation errors · 0 not checkable

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Citations

Cites

Research works printed but not linked: 4

  1. 1998, Med Sci Sports Exerc, 30, 992
  2. Farrell, 1998, Med Sci Sports Exerc, 11, 338
  3. Reiff, 1967, J Sports Med Phys Fitness, 7, 1
  4. Seeman, 1994, Endocrinology, 15, 233

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Metadata

Authors
IZQUIERDO, M., H??KKINEN, K., ANT??N, A., GARRUES, M., IBA??EZ, J., RUESTA, M., & GOROSTIAGA, E. M.
Affiliations
Gobierno de Navarra (ES)
Venue
Medicine & Science in Sports & Exercise
Publisher
Ovid Technologies (Wolters Kluwer Health)
Published
2001-09
Volume
33
Issue
9
Pages
1577-1587
ISSN
0195-9131 (ISSN-L)
DOI
10.1097/00005768-200109000-00022
OpenAlex
W2161121263
Cited by
142
References
41
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 14 · 2021: 5 · 2020: 6 · 2019: 4 · 2018: 6 · 2017: 6 · 2016: 6 · 2015: 4 · 2014: 9 · 2013: 10 · 2012: 11
FWCI
3.28
Type
journal article
Language
en
Open access
closed
Locations
  • Medicine & Science in Sports & Exercise (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
Keywords
aging, middle-aged men, older men, muscle strength, muscle power, muscle cross-sectional area, quadriceps, cycling endurance, blood lactate, testosterone, free testosterone, cortisol, age-related decline, isometric knee extension, half squat
MeSH terms
Adult, Aged, Aging, Bicycling, Biomechanical Phenomena, Energy Metabolism, Humans, Hydrocortisone, Male, Middle Aged, Oxygen Consumption, Physical Endurance, Testosterone, Weight Lifting, Muscle, Skeletal, Muscle Weakness, Lactic Acid

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