Peacocks are famous for their long and magnificently colored tail feathers. it is hard to imagine how such a trait contributes to the probability that peacocks will survive predators to reproduce successfully, however these feathers are probably an example of

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.