Animate the head:
The biped can breathe as it swims, if you animate the head rotation
appropriately.
1 In the Left viewport, select the biped's head, Bip01 Head.
2 Move the time slider to frame 0 and rotate the head about 70 degrees
around the X axis, so the biped’s left ear is pointing down.
Rotate the head for breathing motion.
TIPWatch the Perspective viewport while rotating in the Left viewport.
3 At frame 20, rotate the head back down.
4 Hold down the Shift key and drag to copy the key at frame 0 to frame 40.
Watch the status area to know when you are at frame 40.
Creating a Simple Freeform Animation | 789