Triathlon
How to perform a functional movement screen to identify imbalances relevant to triathlon performance
A practical guide to conducting a functional movement screen that uncovers asymmetries, compensations, and weaknesses across running, cycling, and swimming, enabling targeted training interventions for triathletes.
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Published by Andrew Scott
August 06, 2025 - 3 min Read
A functional movement screen (FMS) is a structured series of movements designed to reveal movement limitations and asymmetries that may contribute to poor technique, increased injury risk, or stalled progress in triathlon training. By evaluating fundamental patterns like hip hinge, quadriceps strength, shoulder mobility, and rotational control, athletes gain a snapshot of how joints and muscles coordinate during common tasks. The goal isn’t perfection but clarity: where do imbalances exist, how severe are they, and which tasks provoke compensations. Conducting the screen consistently, with a controlled environment and standardized instructions, helps coaches tailor progressive loading plans that address the root causes rather than merely treating symptoms.
Before starting, establish clear objectives that align with triathlon demands. Decide whether your priority is injury risk reduction, improved efficiency, or enhanced endurance across three disciplines. Use a quiet space, proper footwear, and minimal distractions to ensure accurate results. Have the athlete perform a light warm-up to activate key muscle groups, followed by a standardized demonstration of each pose. Record observations with notes or video for later analysis. Emphasize symmetry and quality of movement over speed or depth. The practitioner should guide breathing, pace, and alignment to prevent compensatory strategies from masking true mobility or stability deficits.
Pinpoint mobility and stability gaps across all three sport demands with precision.
A well-rounded FMS starts with screening the core and hips, since the pelvis is the anchor for efficient running, cycling, and swimming mechanics. Observe whether the torso maintains alignment as limbs move, whether hips rotate evenly, and if the pelvis tilts excessively during dynamic tasks. Small deviations here can cascade into knee valgus, ankle instability, or lower back strain during long workouts. Document which movements provoke stiffness or wobble, and note any differences between right and left sides. Scoring should reflect quality, control, and consistency, not just range. This approach helps prioritize corrective work such as hip flexor releases, posterior chain strengthening, or trunk stabilization drills.
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Next, assess the spine, shoulders, and thoracic mobility, which influence power transfer and breathing efficiency in triathlons. Limited thoracic rotation can compromise arm swing in freestyle and cycling posture, while stiff shoulders reduce stroke length and efficiency. Evaluate the ability to reach overhead, rotate safely, and maintain ribcage stability during arm movements. If limitations appear, determine whether they stem from tight muscles, joint restrictions, or motor control issues. Use simple corrective cues—such as bracing the core, maintaining a neutral pelvis, or guiding scapular set—to help the athlete reeducate movement patterns. Reassess after a brief intervention to gauge improvement.
Use structured cues to improve control, symmetry, and overall movement quality.
The screening protocol should also afford insight into unilateral loading patterns, which are common in triathlon due to asymmetrical balance demands in cycling and swim starts. Watch for excessive knee inward collapse on one side, or uneven weight transfer during squats and step-downs. Such findings may indicate quadriceps dominance or gluteal insufficiency that fosters fatigue and compensatory spine movement. When a discrepancy is detected, plan targeted single-leg work, hip abductor activation, and neuromuscular training that promotes equal force production. Document progress with repeat tests to monitor shifts in symmetry, endurance, and control across sessions.
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Breath control and ribcage dynamics deserve attention because efficient breathing supports endurance and core integrity during long workouts. Restricted thoracic expansion can translate into shallow breathing, reduced oxygen delivery, and increased chest tension. Observe whether the athlete can inhale fully while maintaining posture during upper-extremity tasks. If impediments appear, introduce diaphragmatic breathing cues, lateral rib expansion drills, and gentle rotational flows that encourage a more relaxed, coordinated breath pattern. Reassess the capacity to sustain diaphragmatic breathing while performing dynamic movements, ensuring improvements hold under light loading or pacing changes, as triathletes must blend breath with propulsion smoothly.
Translate screen results into practical training interventions and routines.
An effective movement screen emphasizes technique cues that translate directly into sport performance. Start with a stable, neutral spine and progress to more dynamic tasks that challenge the core and hips. For runners, focus on ankle damping and knee alignment during the squat-to-stand transition; for cyclists, emphasize hip rotation and trunk stability in a seated position; for swimmers, prioritize shoulder blade control and thoracic mobility during arm cycles. Each cue should be simple, repeatable, and observable. Aim to reduce complexity so the athlete can self-monitor and correct during sessions. The goal is not perfect mechanics in every session but measurable, incremental improvements that transfer to training.
When the screen identifies deficits, structure a concise corrective program tied to triathlon priorities. Prioritize movements that address the most impactful imbalances first, then layer on accessory work as capacity grows. For example, if hip extension is limited, add posterior chain strengthening and hip hinge practice; if shoulder mobility is lacking, incorporate thoracic spine mobility and scapular stabilization. Ensure the plan is progressive and time-bound, with short daily habits that reinforce new neuromuscular patterns. Monitor your approach with periodic retesting and feedback. The right progression respects recovery, avoids overloading, and keeps athletes motivated by clear, observable gains.
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Build an actionable, measurable plan from screen results with ongoing evaluation.
In practice, begin with a concise warm-up that primes the movement patterns you will test, followed by the screen itself and a brief post-test evaluation. Standardize instructions to minimize variability, so changes reflect real progress rather than interpretation. Assign a home program that blends mobility work, corrective exercises, and gradual load introduction tailored to the athlete’s schedule. Maintain a training log that records discomfort, irritability, and performance metrics to help you anticipate flare-ups or plateaus. Encourage athletes to report subtle signs of fatigue or technique drift, because late-stage imbalances often reveal themselves only after sustained training periods.
By integrating an FMS into triathlon preparation, coaches can map a clear path from diagnosis to action. Begin with baseline measurements and repeat every 4–6 weeks, adjusting intensity, volume, and exercise selection as needed. When tests show improvement, celebrate progress but continue challenging the system to prevent regression. If persistent limitations appear, consider consulting physical therapy or sport science specialists who can provide hands-on modalities or advanced assessments. The end goal is a sustainable, individualized strategy that keeps the athlete balanced and capable of handling the cumulative stress of training cycles.
A thorough interpretation of the screen requires distinguishing between mobility restrictions and stability deficits. Mobility issues often respond to targeted stretching or soft-tissue work, whereas stability problems benefit from neuromuscular training, balance challenges, and controlled loading. For triathletes, the balance between flexibility and stiffness matters: excessive slack can reduce power transfer, while excessive tightness can provoke compensations and injuries. Use objective criteria for judging progress, such as improved reach, increased range, or smoother landings under incremental load. Align these metrics with race-specific demands, ensuring that improvements translate into faster splits and more consistent technique.
As you finalize the screen data, design a simple, scalable program that athletes can implement independently between coaching sessions. Include three core components: mobility work to unlock joints, stability or proprioception drills to normalize control, and progressive strength with endurance elements to sustain performance. Schedule weekly check-ins to adjust drills, track adherence, and validate improvements. Emphasize patience and consistency, because meaningful changes in movement quality typically take several weeks. With a disciplined, informed approach, functional movement screening becomes a practical cornerstone of triathlon longevity and performance.
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