How can I speed up to collect sensor(LSM6DS3) data?

Hi

I use a LSM6DS3(6-axis inertial sensor). I connect to sensor and arduino uno board in I2C mode.
I set the LSM6DS3 Output Data Rate is 1.6kHz(both Accelerometer and Gyroscope).
But I can get 200 samples per seconds each axis.
How can I get 1600 samples per seconds each axis?
If I increase Baud rate, can I solve it? (now I set baud rate to 115200)

Thanks

You can't with I2C. Try using SPI.