Open Water Conditioning

by Duncan McNally

Swimming is often viewed through the lens of pristine pools, perfect lane lines, and exact interval training. But there’s another side of the sport that challenges swimmers in unpredictable, dynamic environments: open water swimming. 

While it may seem like a discipline reserved for triathletes and distance enthusiasts, open water conditioning offers a treasure trove of lessons for competitive pool swimmers. Incorporating open water elements into your cross-training can elevate your stamina, sharpen your mental game, and improve your overall performance in the water.

Consider what pool-based swimmers can learn from open water training and how to integrate those insights into regular workouts.

1. Endurance: Building a Stamina Foundation Beyond the Clock

Open water swimmers often train for events that last 30 minutes to more than 2 hours. That kind of endurance isn’t built with short sprint sets or high-intensity intervals alone. It’s forged through long, continuous swims that focus on steady pacing, aerobic strength, and mental resilience.

Cross-training takeaway: Pool swimmers can benefit from incorporating longer, steady-state swims into their weekly schedule. Try setting aside one day each week for continuous swims at 60–70% race pace, focusing on maintaining form and breathing rhythm over time. These swims train the aerobic base and increase your capacity for repeated sprint sets or longer interval workouts.

2. Adaptability: Training in Unpredictable Conditions

Unlike the controlled environment of a swimming pool, open water presents a range of variables: waves, currents, visibility issues, wind, weather, and water temperature shifts. Swimmers must constantly adjust their technique, stroke tempo, and body positioning to stay on course and remain efficient.

Cross-training takeaway: While most pool swimmers won’t encounter these conditions daily, you can simulate unpredictability by varying your training. Use hypoxic sets, practice with limited vision (e.g., wearing fogged goggles), or swim with a group to simulate drafting and pack conditions. These adaptations develop proprioception, balance, and control -- skills that translate to better form under pressure.

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3. Tactical Awareness: Race Smarts Over Raw Speed

Open water races are about more than just speed. They involve strategy, positioning, and pace control. Athletes must know when to surge, how to conserve energy, and where to position themselves within a pack. They also practice sighting, a skill used to navigate without lane lines.

Cross-training takeaway: Coaches can bring these lessons with strategic sets that include buoy turns, drafting practice, or sprint surges mid-set. Incorporate sighting drills by placing floating markers in the pool and requiring swimmers to lift their head every few strokes. This builds awareness and teaches swimmers to maintain speed while processing external cues.

4. Core Strength and Stability: Staying Aligned in Motion

In open water, currents and surface motion challenge the swimmer’s ability to stay streamlined. A strong core is essential for stabilizing the hips, maintaining body roll, and reducing drag.

Cross-training takeaway: Dryland training is key. Swimmers should focus on core-specific exercises such as planks, rotational medicine ball throws, and resistance band twists. In the water, drills like sculling or long-axis balance drills can help reinforce a streamlined body position. These strengthen the midline and improve stroke efficiency across all strokes.

5. Mental Resilience: Embracing Discomfort and Uncertainty

Perhaps the most valuable lesson open water swimming teaches is mental fortitude. Without walls to push off, clocks to glance at, or coaches calling out splits, swimmers must rely on internal motivation and pacing cues. They must also overcome fears of deep water, marine life, and racing without boundaries.

Cross-training takeaway: Pool swimmers can develop mental toughness by incorporating challenging solo sets, race-paced efforts without feedback, and visualization techniques. Mindset training through journaling, breathing exercises, and reflective cool-downs can build the mental stamina needed to stay calm and focused during high-pressure races.

Sample Weekly Integration Plan

Here’s how a pool swimmer might incorporate open water-inspired cross-training into a typical week:

This balanced approach enhances both physical conditioning and mental sharpness.

Real-World Results

Top-level swimmers and collegiate programs have embraced open water training as a supplemental tool. Olympic athletes have utilized open water techniques to boost their endurance and focus. Some high swim school and club coaches now include occasional open water days in their training cycles, especially during summer months, to give athletes a new perspective and challenge.

Swimming fast isn’t just about powerful strokes and perfect turns. 

Make swimming about adaptability, mental strength, and efficiency under pressure. All of which can be honed through open water conditioning. Cross-training with open water principles expands your toolkit as a swimmer, making you not only stronger but smarter in the water.

You don’t need access to a lake or ocean to start. With the right drills, mindset, and structure, you can bring the benefits of open water into the lane lines of your home pool.

So next time you're staring down another set of 100s, remember: the open water is calling. And, the open water has more to teach you than you might expect.

Duncan McNally is a representative of Nemo Swim School, where he delivers fun, safe, and engaging swim lessons for children and adults. With a passion for child development, aquatic activities, and adventure-driven topics, he enjoys sharing his insights through writing and digital outreach.