depending on which type of courses you race, you may never have to shoulder the bike. in many of our races, we don't have extended runs or steep run-ups, so you don't see anyone shouldering the bike. a good suitcase carry is adequate for most short runs (including barriers) with the exception of an extended run-up.

another alternative is to hold the downtube close to the bottom bracket and rest the top tube on your upper arm (below your shoulder). this will stabilize the bike, but you might have to hold the bar with your left hand (not ideal for running).

hope this helps!

Lorri