"1/2 Life" is the amt of time a drug takes to degrade to 1/2 its origninal level.
The division goes on and on to Zero.
Keeping gains off one cycle is possible IMO. If you keep eating and lifting.
First cycle is kind of a gift, most gain and keep some no matter how bad they screw it up.
Quit lifting and eating and get injured etc and any muscle melts down. "Natural" or steroid gains.
But 10 weeks is short IMO.