Featured Research

from universities, journals, and other organizations

High-caffeine-consuming boys get greater rush from caffeine than girls

Date:
February 18, 2011
Source:
University at Buffalo
Summary:
Among the many differences between girls and boys, add the effects from caffeine -- physiological, behavioral and subjective -- to the list.

Among the many differences between girls and boys, add the effects from caffeine -- physiological, behavioral and subjective -- to the list.

Results of a double-blind, placebo-controlled, dose-response study of the response of youth to caffeine found that, in general, boys get a greater rush and more energy from caffeine than girls.

Boys also reported they felt that caffeine had a positive effect on their athletic performance. Girls didn't report on this issue.

The study, conducted by Jennifer L. Temple, PhD, a neurobiologist and assistant professor of exercise and nutrition sciences at the University at Buffalo, appears in the current (December 2010) issue of Experimental and Clinical Psychopharmacology.

It is the first study to demonstrate gender differences in physiological response to acute caffeine in adolescents. Temple's initial paper on this research was published in the December 2009 issue of Behavioural Pharmacology.

"Our findings from this study and from our previous study suggest that boys and girls respond differently to caffeine," Temple says. "We are hoping that our findings from our studies on caffeine will help us to determine why males and females differ in susceptibility to drug abuse and respond differently to treatment."

The study involved 26 boys and 26 girls between the ages of 12 and 17. To take part in the research, the teenagers were required to have previous experience with caffeine but no adverse reactions, and not using hormone-based contraceptives, not smoking, not on any medication that could have adverse interactions with caffeine (e.g., methylphenidate) and were willing to visit the laboratory four times for 90 minutes each.

Participants were instructed not to drink caffeine 24 hours before each visit and to eat nothing or drink nothing but water for two hours before each visit.

On the first visit, participants completed a 24-hour dietary and physical activity recall, including how many caffeinated drinks they consumed, while parents completed a demographic questionnaire. Teens provided a three-millimeter saliva sample analyzed to make sure they had abstained from caffeine as required and weren't taking steroid hormones.

After researchers took baseline heart rate and blood pressure, participants drank a beverage containing 50 mg, 100 mg or 200 mg of caffeine, or one with no caffeine that served as a placebo. The order was randomized across the four visits for each participant.

Blood pressure and heart rate measurements were taken every 10 minutes during the first hour. The teens completed the behavioral checklist again and munched on snack food. After the fourth session, participants had their height and weight measured, and were debriefed about the study.

In addition to the general findings, the study revealed several differences in response to caffeine between girls and boys. Diastolic blood pressure increased and heart rate decreased as percentage of caffeine increased in males, but not in females. In addition, boys who were regular "high consumers" of caffeine showed greater increases in blood pressure than low-consuming boys.

"Caffeine is known to increase blood pressure, but the fact that it caused an exaggerated response in high-consuming males was a surprise, since at the time of measurement the amount of caffeine consumed by boys and girls was the same," says Temple.

"We would have predicted that high consumers would have developed some tolerance to the effects of caffeine and would have reduced responses."

When researchers examined eating behavior as a function of chronic and acute caffeine use, they found that high consumers of caffeine consumed more calories, protein and fat in their typical diet, and ate more high-sugar snack foods in the laboratory, compared with low-caffeine consumers.

The third and perhaps the most important question in this investigation focuses on the effect of caffeine consumption during adolescence on later use of legal or illegal drugs. That paper currently is in preparation.

The Department of Exercise and Nutrition Sciences is part of the UB School of Public Health and Health Professions. Addition authors on the paper are Amber M. Dewey and Laura Briatico, undergraduate research assistants from the UB Department of Psychology.

The research is supported by a grant from the National Institute of Drug Abuse.


Story Source:

The above story is based on materials provided by University at Buffalo. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jennifer L. Temple, Amber M. Dewey, Laura N. Briatico. Effects of acute caffeine administration on adolescents.. Experimental and Clinical Psychopharmacology, 2010; 18 (6): 510 DOI: 10.1037/a0021651

Cite This Page:

University at Buffalo. "High-caffeine-consuming boys get greater rush from caffeine than girls." ScienceDaily. ScienceDaily, 18 February 2011. <www.sciencedaily.com/releases/2011/02/110218111819.htm>.
University at Buffalo. (2011, February 18). High-caffeine-consuming boys get greater rush from caffeine than girls. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2011/02/110218111819.htm
University at Buffalo. "High-caffeine-consuming boys get greater rush from caffeine than girls." ScienceDaily. www.sciencedaily.com/releases/2011/02/110218111819.htm (accessed July 29, 2014).

Share This




More Health & Medicine News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Generics Eat Into Pfizer's Sales

Generics Eat Into Pfizer's Sales

Reuters - Business Video Online (July 29, 2014) Pfizer, the world's largest drug maker, cut full-year revenue forecasts because generics could cut into sales of its anti-arthritis drug, Celebrex. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Nigeria Ups Ebola Stakes on 1st Death

Nigeria Ups Ebola Stakes on 1st Death

Reuters - Business Video Online (July 29, 2014) Nigerian authorities have shut and quarantined a Lagos hospital where a Liberian man died of the Ebola virus, the first recorded case of the highly-infectious disease in Africa's most populous economy. David Pollard reports Video provided by Reuters
Powered by NewsLook.com
Running 5 Minutes A Day Might Add Years To Your Life

Running 5 Minutes A Day Might Add Years To Your Life

Newsy (July 29, 2014) According to a new study, just five minutes of running or jogging a day could add years to your life. Video provided by Newsy
Powered by NewsLook.com
Ebola Outbreak Poses Little Threat To U.S.: CDC

Ebola Outbreak Poses Little Threat To U.S.: CDC

Newsy (July 29, 2014) The Ebola outbreak in West Africa poses little threat to Americans, according to officials with the Centers for Disease Control and Prevention. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins