An Aerial is a gymnastic trick that is a cartwheel without putting your hands on the ground. As with any gymnastic tricks, it will become easier with practice.
saina nehwal practice for 8 hours in day
Pianists normally practice about 8~9 hours everyday.
3 hours
They practice probably anywhere from 4 to 6 hours a day.
18 hours.
a lot of hours
zero hours
27 hours"
10 hours
16 hours
10000 hours of practice