Misleading. The valsalva method of holding your breath produces
an intra-abdominal pressure that stabilizes your spine and locks it
in a neutral position. When you start inhaling or exhaling in the
middle of your lift, you lose this pressure, and your spine loses a
source of support. When this happens, you risk a much higher chance
of an orthopedic injury than a cerebrovascular injury from holding
your breath. It's like saying you risk the chance of stragulation
from putting on seatbelts so you don't put them...now what happens
when you crash?
Bottom line...which one would you rather risk? A 1% chance of
blindness or a 30% chance of back injury?