Navigation Links
Iron, vitamins could affect physical fitness in adolescents
Date:8/8/2012

Bethesda, Md. (Aug. 8, 2012)Adolescence is an important time not only for growing but for acquiring healthy habits that will last a lifetime, such as choosing foods rich in vitamins and minerals, and adopting a regular exercise regimen. Unfortunately, several studies have shown that adolescents' intake of important nutrients, as well as their performance on standard physical fitness tests, has fallen in recent years. Because nutrition and fitness are intertwinedfor example, iron forms part of hemoglobin, which carries oxygen to muscles, and antioxidants such as vitamin C aid in rebuilding damage after intense trainingthese two findings could be related. In a new study, researchers have found that adolescents' blood levels of various micronutrients are correlated with how well they performed in certain physical fitness tests. Though these results don't prove causality, they suggest a new relationship between different measures of adolescent health.

The article is entitled "Iron and Vitamin Status Biomarkers and its Association with Physical Fitness in Adolescents. The HELENA Study." and is online at http://bit.ly/Q2j6lJ. It appears in the online edition of the Journal of Applied Physiology, a publication of the American Physiological Society.

Methodology

Researcher Luis Gracia-Marco of the University of Zaragoza, Spain and his colleagues relied on data from a larger, long-term research project known as the Healthy Lifestyle in Europe by Nutrition in Adolescents Cross-Sectional Study, or HELENA-CSS. Part of this study, which involved thousands of volunteers between the ages of 12.5 and 17.5 in cities scattered across Europe, gathered nutrition and physical fitness data. Blood samples taken in one third of the volunteers (n=1089) were tested for a variety of micronutrients, including hemoglobin, indicative of iron intake, soluble transferrin receptor, serum ferritin, retinol, vitamin C, beta-carotene, alpha-tocopherol, vitamin B6, cobalamin, holo-transcobalamin, plasma folate, RCB folate and vitamin D. The volunteers' physical fitness was also assessed through a standing long jump test, which assesses lower-body muscular strength, and a 20 meter shuttle run test, which assesses cardiovascular fitness through maximal oxygen consumption (VO2max). When looking for correlations between the micronutrient levels and physical fitness, they took into account the adolescents' age, time of year, latitude of the city they lived in, body mass index, age of menarche in females, and amount of regular physical activity (using accelerometers).

Results

The researchers found that blood levels of certain micronutrients were intimately connected with the volunteers' performance on the physical fitness tests. For cardiorespiratory fitness, concentrations of hemoglobin, retinol, and vitamin C in males and beta-carotene and vitamin D in females was associated with VO2max. For muscular fitness, concentrations of hemoglobin, beta-carotene, retinol, and alpha-tocopherol in males and beta-carotene and vitamin D in females was associated with performing better on the standing long jump test.

Importance of the Findings

The authors suggest that studies connecting micronutrients, such as the ones they measured, with physical fitness in any population has been controversial and limited. This is especially true for adolescents, a group that's often difficult to gather information on. This new study, they say, is one of the first to find connections between micronutrients and physical fitness in this age group, with the strength of controlling the results for a complete set of relevant confounders. Yet, they note that more research still needs to be done.

"The associations between physical fitness and iron or vitamin status observed in this cross-sectional study in adolescents should be followed up by a study specifically designed to evaluate causal relationships," the authors write.


'/>"/>

Contact: Donna Krupa
dkrupa@the-aps.org
American Physiological Society
Source:Eurekalert

Related biology news :

1. New model synapse could shed light on disorders such as epilepsy and anxiety
2. Wrinkled surfaces could have widespread applications
3. Lower vitamin D could increase risk of dying, especially for frail, older adults
4. Active forest management to reduce fire could help protect northern spotted owl
5. Diets high in salt could deplete calcium in the body: UAlberta research
6. New species of ancient rodents hint at what could be worlds oldest grasslands
7. Reorganizing brain could lead to new stroke, tinnitus treatments
8. Millions of diabetics could die of tuberculosis
9. Researchers discover molecule in immune system that could help treat dangerous skin cancer
10. Patient-derived stem cells could improve drug research for Parkinsons
11. Programmable RNA complex could speed genome editing in the lab
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a provider ... MegaMatcher Automated Biometric Identification System (ABIS) , ... multi-biometric projects. MegaMatcher ABIS can process multiple complex ... any combination of fingerprint, face or iris biometrics. ... SDK and MegaMatcher Accelerator , which ...
(Date:4/28/2016)... and BANGALORE, India , April 28, ... Systems, a product subsidiary of Infosys (NYSE: INFY ... announced a global partnership that will provide end ... use mobile banking and payment services.      (Logo: ... key innovation area for financial services, but it also plays ...
(Date:4/28/2016)... First quarter 2016:   , Revenues amounted ... quarter of 2015 The gross margin was 49% (27) ... the operating margin was 40% (-13) Earnings per share ... operations was SEK 249.9 M (21.2) , Outlook   ... M. The operating margin for 2016 is estimated to ...
Breaking Biology News(10 mins):
(Date:5/4/2016)... San Diego, CA (PRWEB) , ... May 04, ... ... Mother’s Day? Well, look no further than LaJollaCooks4u, San Diego’s premiere hands-on cooking ... everything you need to give mom an experience she won’t forget. , Guests ...
(Date:5/4/2016)... ... , ... Proove Biosciences, Inc. , the commercial and research leader in ... . The partnership is designed to advance research in pain genetics in an effort ... With the new agreement, researchers at Proove Biosciences are able to collaborate with Luda ...
(Date:5/4/2016)... WHIPPANY, N.J. , May 4, 2016 /PRNewswire/ ... evaluating its oncology compound Stivarga ® (regorafenib) ... hepatocellular carcinoma (HCC) has met its primary endpoint ... The study, called RESORCE, evaluated the efficacy and ... disease has progressed after treatment with sorafenib. The ...
(Date:5/4/2016)... New York, NY (PRWEB) , ... May 04, 2016 , ... ... neurofibromatosis (NF), a genetic disorder that causes tumors to grow on nerves throughout the ... treatment or cure. , Through numerous community events held during the month of May, ...
Breaking Biology Technology: