Open water swimming — whether it's a one-mile lake swim, a ten-kilometer marathon swim, or the swim leg of a triathlon in unpredictable ocean conditions — places physical demands on the body that pool swimming doesn't fully prepare an athlete for. The absence of turn walls, the presence of current and chop, and the sustained head-up navigation stroke all create specific physical requirements that dryland training can directly address.
The shoulder is the primary concern
Shoulder injuries — particularly rotator cuff impingement and tendinopathy — are the dominant overuse injury in swimmers at all levels. The freestyle stroke requires the shoulder to move through end-range positions at high velocity, with force, repeatedly across a session that may involve thousands of strokes. The rotator cuff and the scapular stabilizers are the structures that control and protect that movement. When they're weak or poorly coordinated relative to the prime movers of the stroke, injury is a question of when, not if.
External rotation strengthening, scapular stability work — serratus anterior strengthening, lower trapezius activation — and the rotator cuff work that creates shoulder health in any overhead athlete are non-negotiable components of a swimmer's dryland program. These aren't performance-enhancing additions. They're the prerequisites for sustainable training volume.
Core strength translates directly to stroke efficiency
A well-coordinated freestyle stroke uses the core — particularly the obliques and deep stabilizers — to connect the pulling force of the upper body to the kick of the lower body into a unified movement. A swimmer with poor core strength cannot efficiently transfer force through the body; they lose energy to unwanted trunk rotation and position degradation. The high-elbow catch that every swimming coach emphasizes requires the ability to maintain trunk stability under load — a core function.
Plank variations, anti-rotation exercises, and movements that train the obliques in rotational control all contribute to the core strength that expresses itself in the water. Swimmers who improve their core strength and stability often find that their technique becomes easier to maintain — not because their stroke mechanics changed, but because the physical capacity to hold the required positions improved.
Open water adds specific physical demands
Navigation in open water — lifting the head to sight, adjusting course for current, managing the physical challenge of chop and waves — requires neck strength and endurance that pool swimming doesn't specifically develop. The sighting stroke, where a swimmer lifts their head to see above the waterline, requires sustained neck extension strength that can become a limiting factor over the course of a long open water event.
Cold water immersion creates additional cardiovascular and muscular demands. Core temperature management and the muscular inefficiency that accompanies cold-water swimming both affect performance. Conditioning for open water events benefits from actual open water exposure, but the physical preparation in the gym — building the strength that allows efficient mechanics to be maintained in challenging conditions — is the trainer's primary contribution.
Pulling strength and lat development support the catch
The underwater pull phase of freestyle is where propulsive force is generated. The lats, triceps, and forearm muscles are the primary movers. Swimmers who develop genuine lat and pulling strength through dryland work — pull-ups, lat pulldowns, rows — have more force available in the catch and pull. The connection between pulling strength and swim speed is not linear and doesn't transfer without practice in the water, but the physical capacity that's built in the gym provides the ceiling that technique can work within.
Personal trAIner PRO keeps the client's event goals, training history, shoulder injury history, and program progression in the profile. For a swimmer preparing for a marathon swim event, the program can be built with that specific goal in view — ensuring that the dryland work is appropriate for the event distance and timing.