The main male hormone, testosterone is associated with sexual function, circulation and muscle mass, as well as mood, memory and concentration. "When a man becomes grumpy or irritable, it's easy to blame work or simply the effects of ageing," the Telegraph quoted Petty, as saying.
"In the short-term, stress can increase levels of testosterone and this is useful to help people respond quickly to pressures and new situations."
"But chronic stress, which is ongoing, is a major factor in the decline of testosterone. "Chronic stress occurs all too frequently due to our modern lifestyles, when everything from high-pressured jobs to unemployment keeps the body in a state of perceived threat," he added.
Lowered levels of hormones causes irritability, lethargy, low drive and a lack of concentration. The solution to this is reducing stress, eating healthy and plenty of exercise.AGENCIES