Kurtenbach: Kyle Shanahan faces his toughest test yet — getting the ‘Last Dance’ 49ers on the floor

SANTA CLARA—The West Coast heatwave wreaked havoc on the 49ers’ practice schedule this past week, leading coach Kyle Shanahan to joke that he, like his players, will take intravenous fluids to rehydrate.

“I still do it, if I had too much fun the night before,” Shanahan said.

Yes, Shanahan knows the cure for his hangovers.

Now, does he know how to fix his team’s?

The Niners’ Super Bowl hangover is real. It’s been real for months.

It’s manifested in the dull energy around the team in the preseason...