If saiyan's power level multiplies every time they have bone crushing battles and recover...why didn't they ever consider a room made to beat the **** out of some soldiers and then throwing them in a recovery pod until they had an army of saiyans stronger then Friza...? why the hell did vegeta train by fighting saiba man when he could have just let them beat the **** out of him? and don't give me that ******** about "well they probably didn't exactly like to get hit". They where a race of alien warriors who loved war and violence. HELL if I got 3 times stronger every time I got the **** beaten out of me I would walked into school every day I could and try to get someone to hit me.