Too much of cycling affects fertility

Men who spend more time riding a bicycle could be pedalling their fertility away, suggests a new study.
The research showed that those riding more than 180 miles a week had fewer than four per cent normal sperm. It means their chance of fatherhood is extremely low.
Professor Diana Vaamonde, University of Cordoba Medical School, Spain, said that the triathletes who did the most cycling training had the worst sperm morphology.
Vaamonde and team had previously shown that both high exercise intensity and high exercise volume may be detrimental to sperm quality. They decided to take a more profound look at the sportsmen who seemed to show the greatest alteration — the triathletes — and assess the correlation between the volume of training in each activity and sperm quality.
Of the three modalities, only cycling, the activity for which triathletes undertake the most training, showed a clear correlation with sperm quality.
The more cycling training the sportsmen undertook, both in time and kilometres, the worse their sperm quality became.

Aerobic activity keeps brain young

Aerobic activity may help keep the brain young, says a new research from the University of North Carolina at Chapel Hill School of Medicine.
In the study, physically active elderly people showed healthier cerebral blood vessels. Researchers, led by Elizabeth Bullitt, used non-invasive magnetic resonance (MR) angiography to examine the number and shape of blood vessels in the brains of physically active elderly people, seven men and seven women, ages 60 to 80.
Aerobically active subjects exhibited more small-diameter vessels with less tortuosity, or twisting, than the less active group, exhibiting a vessel pattern similar to younger adults.

Effects of mother’s stress on kids

British researchers have advised expectant mothers to reduce their anxiety and stress levels to protect their kids from developing behavioural and emotional problems later.
The researchers from Imperial College London hope that it will raise families’ awareness of the importance of reducing levels of stress and anxiety in expectant mothers. They say that reducing stress during pregnancy could help prevent thousands of children from developing emotional and behavioural problems.
According to Professor Vivette Glover, maternal stress and anxiety can alter the development of the baby’s brain. This in turn can result in a greater risk of emotional problems such as anxiety or depression, behavioural problems such as Attention Deficit Hyperactivity Disorder, and being considerably slower at learning.

Seasons promote global hunger

Most of the world’s hunger doesn’t occur in conflicts or natural disasters but is actually driven by seasonal cycle, according to a new research.
The ‘hunger season’ is the time of year when the previous year’s harvest stocks have dwindled, food prices are high, and jobs are scarce, and is often under recognised.
According to the researchers, presently nearly six hundred million people are either members of small farm households or landless rural labourers.
They say that many of these people live in areas where water or temperature constraints allow only one crop harvest per year.