Capillary density and capillary-to-fibre ratio in vastus lateralis muscle of untrained and trained men

Capillary density and capillary-to-fibre ratio in vastus lateralis muscle of untrained and trained men

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Muscle fibre profile area (Af), volume density (V_v), capillary-to-fibre ratio (CF) and number of capillaries per fibre square millimetre (CD) were determined from needle biopsies of vastus lateralis of twenty-four male volunteers (mean ± SD: age 25.4±5.8 years, height 178.6±5.5 cm, body mass 72.

1±7.7 kg) of different training background.Seven subjects were untrained students (group A), grand love red heart reposado tequila nine were national and sub-national level endurance athletes (group B) with the background of 7.8±2.9 years of specialised training, and eight subjects were sprint-power athletes (group C) with 12.

8&#177;8.7 years of specialised training.Muscle biopsies of <i>vastus lateralis</i> were analysed histochemically for mATPase.Capillaries were visualized and counted using CD31 antibodies against endothelial cells.There were significant differences in the V_v of type I and type II muscle fibres in both trained groups, B (51.

8%; 25.6%) and C (50.5%; 26.4%).However, in untrained group A that was treated as a reference group, the difference between V_v of type I and type II fibres was less prominent, nevertheless statistically significant (42.

1%; 35.1%).There was also a significant difference in CF: 1.9 in group A simply boho classroom and 2.1 in groups B and C.

The number of capillaries per mm² (CD) was 245 (group A), 308 (group B) and 325 (group C).Significant differences (P<0.05) in CF and CD, were found only between group A (1.9; 245) and both groups of trained men, B and C (2.1; 308 and 325).

However, endurance athletes (group B), such as long-distance runners, cyclists and cross country skiers, did not differ from the athletes representing short term, high power output sports (group C) such as ice hockey, karate, ski-jumping, volleyball, soccer and modern dance.