Trouble comes in when more-powerful flexing muscles
dominate the relaxing ones.
The giant outdoor event is now in its 13th year and more than 100 exhibitors will be sharpening chisels and flexing muscles
to provide a riot of eco-themed family fun.
Singing involves flexing muscles
and those muscles will eventually give out, just as an athlete eventually loses strength, speed or endurance.
A mere electrical whisper compared with muscle signals, brain waves flutter at about one-tenth the frequency of typical electrical oscillations in flexing muscles
on account of Pakistan's nuclear arsenal, the former Pakistan Army chief said India's "anti- Muslim and anti- Pakistan" Prime Minister Narendra Modi should not "plan any misadventure".