Bob-Everything needs a context. I think the mistake most people make is they just time the length of a player’s shift and assume that mimicking the same intervals off the ice, but with less rest, is the optimal conditioning strategy. I think it’s important for people to watch the player, not the game. If I’m a winger and my shift lasts 45s, there’s a stoppage, and I’m in the D-zone for 20s, I may be skating hard for 10-15s across the duration of that shift. In general, I think hockey players should spend more time training their energy systems at shorter intervals. The only time we really went beyond 15-20s throughout our entire off-season was in the final couple of weeks leading into camp, and to be honest, that was almost entirely because so many of our players had on- and/or off-ice tests that required longer duration efforts.