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Titolo:
Effect of aerobic capacity on the T-2 increase in exercised skeletal muscle
Autore:
Reid, RW; Foley, JM; Jayaraman, RC; Prior, BM; Meyer, RA;
Indirizzi:
Michigan State Univ, Dept Physiol, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 ysiol, E Lansing, MI 48824 USA Michigan State Univ, Dept Radiol, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 adiol, E Lansing, MI 48824 USA Michigan State Univ, Dept Kinesiol, E Lansing, MI 48824 USA Michigan StateUniv E Lansing MI USA 48824 esiol, E Lansing, MI 48824 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3, volume: 90, anno: 2001,
pagine: 897 - 902
SICI:
8750-7587(200103)90:3<897:EOACOT>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-RESONANCE IMAGES; IN-VIVO; RELAXATION-TIMES; RELAXOMETRY; MRI; INTENSITY; T2;
Keywords:
muscle recruitment; muscle functional magnetic resonance imaging; cycling exercise; transverse relaxation time;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Meyer, RA Michigan State Univ, Dept Physiol, Giltner Hall, E Lansing, MI 48824 USA Michigan State Univ Giltner Hall E Lansing MI USA 48824 8824 USA
Citazione:
R.W. Reid et al., "Effect of aerobic capacity on the T-2 increase in exercised skeletal muscle", J APP PHYSL, 90(3), 2001, pp. 897-902

Abstract

The increase in nuclear magnetic resonance transverse relaxation time (T-2) of muscle water measured by magnetic resonance imaging after exercise hasbeen correlated with work rate in human subjects. This study compared the T-2 increase in thigh muscles of trained (cycling (V) over dot(2 max) = 54.4 +/- 2.7 ml O-2 . kg(-1) . min(-1), mean +/- SE, n = 8, 4 female) vs. sedentary (31.7 +/- 0.9 ml O-2 . kg(-1) . min(-1), n = 8, 4 female) subjects after cycling exercise for 6 min at 50 and 90% of the subjects' individually determined (V) over dot(2 max). There was no significant difference betweengroups in the T-2 increase measured in quadriceps muscles within 3 min after the exercises, despite the fact that the absolute work rates were 60% higher in the trained group (253 +/- 15 vs. 159 +/- 21 W for the 90% exercise). In both groups, the increase in T-2 of vastus muscles was twofold greater after the 90% exercise than after the 50% exercise. The recovery of T-2 after the 90% exercise was significantly faster in vastus muscles of the trained compared with the sedentary group (mean recovery half-time 11.9 +/- 1.2 vs. 23.3 +/- 3.7 min). The results show that the increase in muscle T-2 varies with work rate relative to muscle maximum aerobic power, not with absolute work rate.

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Documento generato il 03/12/20 alle ore 04:15:30