Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
6
|
| pubmed:dateCreated |
1988-3-22
|
| pubmed:abstractText |
Ten men and 10 women exercised on a bicycle ergometer for 20 min at 40, 60, and 80% maximal oxygen uptake (VO2max) to determine the relationship between plasma beta-endorphin, catecholamines, and exercise intensity. Compared to rest, plasma beta-endorphins were not significantly elevated during the 40 and 60% workloads (4.8 +/- 1.0 pmol.l-1 vs 3.8 +/- 0.7 and 6.3 +/- 0.9, respectively). In contrast, the 80% exercise significantly elevated endorphins to 16.1 +/- 4.0 pmol.l-1. Plasma norepinephrine concentrations were 0.30 +/- 0.04 ng.ml-1 at rest and increased with exercise intensity (40% = 0.60 +/- 0.05, 60% = 0.93 +/- 0.07, 80% = 2.00 +/- 0.14, VO2max = 2.55 +/- 0.14 ng.ml-1). Plasma epinephrine followed the same trend (rest = 0.07 +/- 0.01, 40% = 0.33 +/- 0.03, 60% = 0.49 +/- 0.02, 80% = 0.88 +/- 0.07, VO2max = 0.95 +/- 0.06 ng.ml-1). Norepinephrine was found to significantly correlate to endorphins (r = 0.499; P less than 0.02). Conversely, epinephrine was not correlated with beta-endorphin (r = 0.309; P greater than 0.05). The low correlation suggests a weak relationship between beta-endorphin and catecholamine responses during exercise. The results of this investigation suggest that the relationship between beta-endorphin and exercise intensity is curvilinear, with anaerobic activity producing the most significant endorphin response. It was also noted that the beta-endorphin response was not related to gender, but the amine response to exercise was gender-related, being greater for the men.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical | |
| pubmed:status |
MEDLINE
|
| pubmed:month |
Dec
|
| pubmed:issn |
0195-9131
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
19
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
570-4
|
| pubmed:dateRevised |
2008-11-21
|
| pubmed:meshHeading |
pubmed-meshheading:2963188-Adult,
pubmed-meshheading:2963188-Epinephrine,
pubmed-meshheading:2963188-Female,
pubmed-meshheading:2963188-Humans,
pubmed-meshheading:2963188-Male,
pubmed-meshheading:2963188-Norepinephrine,
pubmed-meshheading:2963188-Oxygen Consumption,
pubmed-meshheading:2963188-Physical Exertion,
pubmed-meshheading:2963188-beta-Endorphin
|
| pubmed:year |
1987
|
| pubmed:articleTitle |
Exercise intensity-related responses of beta-endorphin and catecholamines.
|
| pubmed:affiliation |
Physical Education Department, University of North Carolina, Chapel Hill 27514.
|
| pubmed:publicationType |
Journal Article
|