Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Relationship between fat-to-fat-free mass ratio and decrements in leg strength after downhill running
Autore:
Hickner, RC; Mehta, PM; Dyck, D; Devita, P; Houmard, JA; Koves, T; Byrd, P;
Indirizzi:
E Carolina Univ, Human Performance Lab, Dept Exercise & Sports Sci, Greenville, NC 27858 USA E Carolina Univ Greenville NC USA 27858 rts Sci, Greenville, NC 27858 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 4, volume: 90, anno: 2001,
pagine: 1334 - 1341
SICI:
8750-7587(200104)90:4<1334:RBFMRA>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONSET MUSCLE SORENESS; ISOKINETIC ECCENTRIC EXERCISE; HIGH-ENERGY PHOSPHATES; ADIPOSE-TISSUE; DAMAGE; GLYCOGEN; SERUM; CONTRACTIONS; METABOLISM; RESISTANCE;
Keywords:
adiposity; eccentric contractions; exercise; isokinetic strength; muscle soreness;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Hickner, RC E Carolina Univ, Human Performance Lab, Dept Exercise & SportsSci, 371 Ward Sports Med Bldg, Greenville, NC 27858 USA E Carolina Univ 371 Ward Sports Med Bldg Greenville NC USA 27858
Citazione:
R.C. Hickner et al., "Relationship between fat-to-fat-free mass ratio and decrements in leg strength after downhill running", J APP PHYSL, 90(4), 2001, pp. 1334-1341

Abstract

The purpose of this study was to determine whether greater body fat mass (FM) relative to lean mass would result in more severe muscle damage and greater decrements in leg strength after downhill running. The relationship between the FM-to-fat-free mass ratio (FM/FFM) and the strength decline resulting from downhill running (-11% grade) was investigated in 24 male runners[age 23.4 +/- 0.7 (SE) yr]. The runners were divided into two groups on the basis of FM/ FFM: low fat (FM/FFM = 0.100 +/- 0.008, body mass = 68.4 +/-1.3 kg) and normal fat (FM/FFM = 0.233 +/- 0.020, body mass = 76.5 +/- 3.3kg, P < 0.05). Leg strength was reduced less in the low-fat (-0.7 +/- 1.3%) than in the normal-fat individuals (-10.3 +/- 1.5%) 48 h after, compared with before, downhill running (P < 0.01). Multiple linear regression analysis revealed that the decline in strength could be predicted best by FM/FFM (r(2) = 0.44, P < 0.05) and FM-to-thigh lean tissue cross-sectional area ratio (r(2) = 0.53, P < 0.05), with no additional variables enhancing the prediction equation. There were no differences in muscle glycogen, creatine phosphate, ATP, or total creatine 48 h after, compared with before, downhill running; however, the change in muscle glycogen after downhill running was associated with a higher FM/FFM (r = -0.56, P < 0.05). These data suggest that FM/FFM is a major determinant of losses in muscle strength after downhill running.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 05:38:41