To prepare for the cold-weather months, Montreal endurance athlete Emmanuelle-Salambo Deguara tracks her shifting nutrition needs, hydration and energy use with apps and wearables. “For the same run in the winter, I’m going to spend more energy than in the summer,” she says.

On misty mornings, over crisp lunch breaks and even during work meetings Emmanuelle-Salambo Deguara is out running.

An endurance athlete and co-founder of the global running community The 6 AM Club , the Montreal lawyer views the cold months ahead as a chance to sharpen her resilience and deepen her self-awareness.

“When I go for a run and it’s dark, I feel like I’m the only one outside,” says Ms. Deguara, 29. “I just have to dress well and enjoy the moment.”

Currently training for a 320-kilometre ultramarathon

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