News
Low vitamin D levels linked to poor performance in athletes
1 November 2012
According to a new UK study, insufficient blood vitamin D concentrations may be detrimental to musculoskeletal performance in athletes.
25 June 2012
New US research says that daily vitamin C supplementation may decrease heart rate during moderate exercise for obese people and reduce their perception of fatigue and exertion.
In the study, 20 obese adults (mean BMI of 34.3 kg/m2 and average age of 35 years) consumed a calorie-controlled diet for four weeks with or without a daily supplementation of 500 mg vitamin C (1). At the begin-ning and the end of the study, the participants performed 60 minutes of moderate exercise (walking) at an intensity of 50% predicted maximal oxygen consumption. The study results showed that both groups lost about four kilograms and there were no differences in breathing between the groups. However, the vitamin C group had significantly lower heart rates (an average of 11 fewer heart beats per minute) during exercise, compared with the control group. In addition, the ratings of perceived exertion and perceived fatigue were also significantly reduced in the vitamin C group.
The researchers concluded that this data indicates that vitamin C supplementation can decrease perception of fatigue and exertion during moderate exercise for obese people. Thus, increased vitamin C intake may be a strategy to improve adherence to exercise protocols for obese. According to the researchers, perceived exertion is typically correlated to heart rate and blood lactate concentrations and considered a gauge for muscular effort, fatigue, and muscle aches. Since heart rate is a contributing factor to perceived effort, the significant decrease in the exercising heart rate noted for the vitamin C group may have influenced the reported reduced perceived exertion.
1 November 2012
According to a new UK study, insufficient blood vitamin D concentrations may be detrimental to musculoskeletal performance in athletes.
15 August 2014
While human milk is the preferred source of most nutrients for infants during the first year, there has been concern about the adequacy of human milk in providing vitamin D.
9 August 2012
A new US review suggests that the recommended dietary allowance (RDA) for vitamin C be increased by more than 100% of the current levels for adults.