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Building endurance: Training principles for long-term performance

Written by Fiona

June 29 2026

Whether you’re building toward a long trail run through the Cairngorms, a multi-day kayaking expedition along the Scottish coast, or a ski touring route high in the winter hills, the principles that underpin endurance performance are consistent across all of them. Train smart, recover well, fuel properly and stay consistent, so that when the discipline changes, the framework does not.

Credit: Hanson Lu / unsplash

Build Smart

Endurance gains come not from training harder but from training progressively, and that distinction matters more than most athletes realise. 

The principle of overload requires the body to be challenged incrementally, increasing volume, intensity, or duration in small steps that allow adaptation without tipping into injury. 

That structure typically follows an 80/20 intensity split: Around 80% of training at low to moderate effort, with the remaining 20% at high intensity. 

From hikers to Premiership Rugby players, all follow the same logic of building their aerobic base before introducing high-intensity work that makes them ready on the big day. It’s a little reminder that phased preparation applies across every endurance discipline.

Credit: Alessio Soggetti / unsplash

Recover and Fuel

Adaptation happens during rest, not during training, which makes recovery as deliberate a part of preparation as the sessions themselves. 

Nutrition supports that process: Carbohydrate remains the primary fuel for sustained effort, and for sessions exceeding 90 minutes, research supports consuming 60g or more per hour to maintain output. 

Protein intake of between 1.2–2.0 g per kilogram of body weight per day supports muscle repair and training adaptation. 

Hydration needs are highly individual, with sweat rates during endurance activity ranging from 0.5 to nearly 3 litres per hour, making personal awareness more reliable than rigid prescriptive targets. 

For long kayaking days or open water swims, where access to food and fluid is limited, pre-session fuelling becomes particularly important.

Stay Consistent

The most effective injury prevention strategy is load management, avoiding sudden spikes in session distance or weekly volume rather than relying on stretching alone. 

Strength training targeting the core, legs and posterior chain has been shown to reduce overuse injury risk significantly

For ski touring and hill running, terrain-specific preparation matters, such as carrying a pack on hilly ground develops load tolerance that flat-surface training cannot replicate.

The Long Game

The temptation in endurance training is always to do more and go harder, but what separates consistent progress from plateau or injury is rarely talent or volume. Build load gradually, respect recovery, fuel the work you are doing, and prepare on terrain that reflects your goal. The framework is the same whatever the pursuit.

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