Linked Life Data

8549580

Source:http://linkedlifedata.com/resource/pubmed/id/8549580

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1996-2-22
pubmed:abstractText
Energy costs and energy sources in karate (wado style) were studied in eight male practitioners (age 23.8 years, mass 72.3 kg, maximal oxygen consumption (VO2max) 36.8 ml.min-1.kg-1) performing six katas (formal, organized movement sequences) of increasing duration (from approximately 10 s to approximately 80 s). Oxygen consumption (VO2) was determined during pre-exercise rest, the exercise period and the first 270 s of recovery in five consecutive expired gas collections. A blood sample for lactate (la-) analysis was taken 5 min after the end of exercise. The overall amount of O2 consumed during the exercise and in the following recovery increased linearly with the duration of exercise (t) from approximately 1.51 (for t equal to 10.5 s (SD 1.6)) to approximately 5.8 l, for t equal to 81.5 s (SD 1.0). The energy release from la- production (VO2la-) calculated assuming that an increase of 1 mmol.l-1 la- corresponded to a VO2 of 3 mlO2.kg-1 was negligible for t equal to or less than 20 s and increased to 17.3 ml.kg-1 (la- = 5.8 mmol.l-1 above resting values) for t equal approximately to 80 s. The overall energy requirement (VO2eq) as given by the sum of VO2 and VO2la- was described by VO2eq = 0.87 + 0.071.t (n = 64; r2 = 0.91), where VO2eq is in litres and t in seconds. This equation shows that the metabolic power (VO2eq.t-1) for this karate style is very high: from approximately 9.5 l.min-1 for t equal to 10 s to approximately 4.9 l.min-1 for t equal to 80 s, i.e. from 3.5 to 1.8 times the subjects' VO2max. The fraction of VO2eq derived from the amount of O2 consumed during the exercise increased from 11% for t equal to 10 s to 41% for t equal to 80 s whereas VO2la- was negligible for t equal to or less than 20 s and increased to 13% for t equal to 80 s. The remaining fraction (from 90% for t equal to 10 s to 46% for t equal to 80 s), corresponding to the amount of O2 consumed in the recovery after exercise, is derived from anaerobic alactic sources, i.e. from net splitting of high energy phosphates during the exercise.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0301-5548
pubmed:author
pubmed:issnType
Print
pubmed:volume
71
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
355-61
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Energy cost and energy sources in karate.
pubmed:affiliation
Dipartimento di Scienze e Tecnologie Biomediche, Università degli Studi di Udine, Italy.
pubmed:publicationType
Journal Article, Clinical Trial, Research Support, Non-U.S. Gov't