how to read gyro or accel data at the same time? standby??

Hello,

I am reading gyro and accelerometer data, but the problem is when I read a high byte of lets say Gyro, and then after (approx : 1ms) I read low byte.. but the problem is they are not the values at the same time..
any method to read the data before update happens to the registers?
I tried to use Standby before reading and then reset standby after reading, but it doesn't work..

thanks :?