The Effects of Caffeine

Syed, Ibrahim B.

doi:10.1016/s0003-0465(16)33766-1

Cited by 6 publications

(3 citation statements)

References 47 publications

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“…2). Caffeine has been suggested to be a hyperglycemic agent (10,34), enhancing hepatic cAMP activity, thus stimulating glycogenolysis (32) and, in turn, insulin secretion (33). This response, however, is unlikely in view of more recent studies on the interrelationships of elevated FFA use and suppressed glucose uptake (27) and lower overall carbohydrate metabolism (12,13,19,20,25,27).…”

Section: Resultsmentioning

confidence: 99%

Effects of Caffeine Ingestion on Utilization of Muscle Glycogen and Lipid During Leg Ergometer Cycling

Essig¹,

Costill²,

Handel³

1980

Int J Sports Med

165

130

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Section: Resultsmentioning

confidence: 99%

Effects of Caffeine Ingestion on Utilization of Muscle Glycogen and Lipid During Leg Ergometer Cycling

Essig¹,

Costill²,

Handel³

1980

Int J Sports Med

165

130

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“…On each occasion caffeine,‡ 4 mg/kg, was given intravenously during 30 minutes. This dose was designed to achieve a peak plasma caffeine level similar to that produced by the ingestion of two to three cups of brewed coffee 5 …”

Section: Methodsmentioning

confidence: 99%

Cardiovascular Effects of Caffeine in Elderly Men

Conrad

Blanchard

Trang

1982

J American Geriatrics Society

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Ten healthy elderly male volunteers were given 4 mg/kg of caffeine by intravenous infusion on three separate occasions. This resulted in mean peak plasma concentrations of caffeine of 7.4 +/- 0.7 micrograms/ml. Immediately after each of the three caffeine infusions, the mean systolic blood pressures increased 14, 7, and 16 mm Hg, and the mean diastolic blood pressures increased 7, 4, and 7 mm Hg, respectively. Both the systolic and the diastolic blood pressures returned to preinfusion values within 4 hours. The QS2 index and the left ventricular ejection time (LVET) index increased after caffeine, probably as a result of the caffeine-induced increase in arterial blood pressure. The pre-ejection period (PEP), the PEP/LVET ratio, and the diastolic time remained unchanged. Caffeine, in doses equal to those contained in 2 to 3 cups of coffee, produces an increase in blood pressure but has no demonstrable positive inotropic effect in healthy elderly men.

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“…Caffeine elevates respiratory and metabolic rate (Lombardo, 1986), acts as a diuretic on kidneys (Bellet, Roman, DeCastro, Kim & Kershbaum, 1969), reduces liver and mesenteric blood flow (Onrot, Goldberg, Biaggioni, Hollister & Kincaid, 1985;Onrot, Shaheen, Biaggioni, Golbert & Feely, 1986), leads to colon anxiety (Cines & Rozin, 1982), reduces competence of the esophageal sphincter muscle (i.e., heartburn; Bunker & McWilliams, 1979), affects vagal, medullary and vasomotor centers (Syed, 1976). At high concentrations, caffeine collects in muscle tissue (Burg, 1975) and can interfere with neuromuscular transmission (VanHandle, 1983, pg.…”

Section: Effects Of Caffeine Usementioning

confidence: 99%

The Effects of Caffeine and Caffeine Withdrawal/Deprivation on Hostage Negotiator Performance

Mullins¹

2003

Journal of Police Crisis Negotiations

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Caffeine is the most widely-used substance in the United States. Police use much more caffeine on average than most other segments of the workforce. Caffeine has both positive and negative effects on the user. The effects of caffeine and how caffeine might affect the hostage negotiator are reviewed. For the most part, use of caffeine during a hostage negotiation situation would be deleterious to negotiator performance; behaviorally, emotionally, and cognitively. Withdrawal and deprivation effects of caffeine are presented, along with discussions of how negotiator performance would be affected. General suggestions to guide negotiator use of caffeine during a hostage situation are presented.

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The Effects of Caffeine

Cited by 6 publications

References 47 publications

Effects of Caffeine Ingestion on Utilization of Muscle Glycogen and Lipid During Leg Ergometer Cycling

Effects of Caffeine Ingestion on Utilization of Muscle Glycogen and Lipid During Leg Ergometer Cycling

Cardiovascular Effects of Caffeine in Elderly Men

The Effects of Caffeine and Caffeine Withdrawal/Deprivation on Hostage Negotiator Performance

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