“My aim is to extend carry while staying in my confort zone. That zone is staked out with a bunch of big signs that all say “Keep out! No heaving allowed”. How do I know when I am at the edge of that zone? It is when my technique starts to crack, slack starts to increase and I am sorely tempted to heave to try and get rid of it. In other words the appearance of slack is an alarm signal telling me my technique is faltering.”

Mark Herron