Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Maximal strength and power, endurance performance, and serum hormones in middle-aged and elderly men
Autore:
Izquierdo, M; Hakkinen, K; Anton, A; Garrues, M; Ibanez, J; Ruesta, M; Gorostiaga, EM;
Indirizzi:
Gobierno Navarra, Ctr Invest & Med Deporte, Pamplona 31002, Spain GobiernoNavarra Pamplona Spain 31002 Med Deporte, Pamplona 31002, Spain Univ Jyvaskyla, Dept Biol Phys Activ, SF-40100 Jyvaskyla, Finland Univ Jyvaskyla Jyvaskyla Finland SF-40100 v, SF-40100 Jyvaskyla, Finland Univ Jyvaskyla, Neuromuscular Res Ctr, SF-40100 Jyvaskyla, Finland Univ Jyvaskyla Jyvaskyla Finland SF-40100 r, SF-40100 Jyvaskyla, Finland
Titolo Testata:
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
fascicolo: 9, volume: 33, anno: 2001,
pagine: 1577 - 1587
SICI:
0195-9131(200109)33:9<1577:MSAPEP>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISTANCE-RUNNING PERFORMANCE; OLDER MEN; RESISTANCE EXERCISE; DYNAMIC ACTIONS; MUSCLE; TESTOSTERONE; VO2MAX; PREDICTION; THRESHOLD; REDUCTION;
Keywords:
aging; muscle strength; force-velocity; muscle power; maximal aerobic power; testosterone; cortisol;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Izquierdo, M Gobierno Navarra, Ctr Invest & Med Deporte, C Paulino Caballero 13, Pamplona 31002, Spain Gobierno Navarra C Paulino Caballero 13 Pamplona Spain 31002
Citazione:
M. Izquierdo et al., "Maximal strength and power, endurance performance, and serum hormones in middle-aged and elderly men", MED SCI SPT, 33(9), 2001, pp. 1577-1587

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; MIFKE), power-load curves during concentric actions with loadsranging from 15% to 70% of I RM half-squat (IRMHS), muscle cross-sectionalarea 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 IRMHS (14%), MIFKE (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 CSAQF. 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 relativeto 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 anddemand 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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 22:35:48