Paced Exhalation Cadence for Rowing Pieces

Audience and game plan first: this article is for indoor rowers, on‑water crews, masters athletes, CrossFitters who love the erg, and coaches who want cleaner split charts and calmer athletes. We’ll cover what breath‑to‑stroke ratios mean in plain language; why CO₂ matters more than most people think; how your diaphragm, trunk, and larynx coordinate with the stroke; how to map a simple “erg pacing breath” to UT2, UT1, AT, TR, and race pieces; a step‑by‑step performance breathing plan with drills; what to track and how to troubleshoot; critical perspectives and known risks; and how to turn this into a race‑day routine with a cool head and a steady cadence.

 

Before we get too serious, picture the stroke as a four‑beat song—catch, drive, finish, recovery—and your breathing as the percussion section. If the band speeds up and the drummer panics, the whole song goes off‑key. Same thing on the erg: breathe with intention and the numbers settle; breathe randomly and you chase the screen. That matching of breathing and movement is called locomotor–respiratory coupling. In novice rowers, consistent coupling increases across a training season, and more athletes show synchronized breathing at peak efforts by late winter, suggesting it’s a coordination skill that improves with practice.¹ Now, this isn’t magic; a randomized study in untrained men found that forcing a specific inhale‑on‑drive or exhale‑on‑drive pattern didn’t make them more economical over a few short sessions.² The takeaway is simple: coupling emerges with skill and exposure, not by brute force in a single workout.

 

Let’s define the “breath‑to‑stroke ratio” without jargon. A 1:1 ratio means you complete one full breath (in + out) per stroke. A 2:1 ratio means one full breath every two strokes, often with a tidy pattern like exhale during recovery and inhale near the catch, or the reverse. In varsity men during a real 2,000‑m test, most rowers lock into integral ratios such as 2:1 and hold them for minutes at a time, typically syncing inspiration near the catch and finish.³ That pattern has a practical logic: it keeps the chest and abdominal pressures predictable around the high‑force moments of the stroke.

 

Why obsess over carbon dioxide? Because CO₂ is not just exhaust. It helps regulate blood pH and cerebral blood flow. If you hyperventilate, CO₂ drops and brain blood vessels constrict; if you hold your breath long or stack breaths poorly, CO₂ rises and the urge to breathe spikes. During exercise, hypocapnia from over‑breathing can reduce cerebral blood flow, while large swings in CO₂ during maximal breath holds can impair cerebral autoregulation.⁴⁻⁶ On the other hand, deliberately tolerating more CO₂ through voluntary hypoventilation intervals has been studied in runners and swimmers; the work can raise ventilatory drive and discomfort, and it may stress oxygenation. In controlled experiments, short breath‑hold sets at low lung volume increased the oxygen cost and lowered SpO₂ compared with normal breathing, which is a red flag for some athletes.⁷ A 2023 overview also notes that CO₂ manipulation changes brain perfusion and sensation of effort—interesting physiology, but it needs cautious use in sport settings.⁸

 

Rowing adds two special twists: respiratory muscle load and upper‑airway control under high flow. First, the inspiratory muscles do real work when you’re racing. An 11‑week inspiratory muscle training protocol in competitive female rowers—30 resisted breaths twice daily at ~50% maximal inspiratory pressure—improved inspiratory strength and trimmed time in 5,000‑m and 6‑min tests by a few percent compared with a placebo device.⁹ Those are small but meaningful differences for trained athletes. Second, some athletes experience exercise‑induced laryngeal obstruction (EILO). In rowing cohorts, EILO has been detected with continuous laryngoscopy during sport, and in mixed athletic groups the prevalence can sit around a third of referred cases.¹⁰⁻¹³ The key message: if a “tight throat,” noisy inspiration, or sudden airflow limitation appears as intensity climbs—especially if bronchodilators don’t help—consider airway evaluation. Technique cues alone won’t fix structural obstruction.

 

How does the diaphragm play with posture? Your diaphragm does double duty: it pulls air in and contributes to trunk stiffness. Work in lab settings shows it contracts in anticipation of limb movement and helps stabilize the spine during forceful tasks.¹⁴ That’s relevant at the catch and finish, where rapid pressure shifts can either support or fight the stroke. Over‑pressurizing the belly with a prolonged Valsalva can elevate blood pressure unnecessarily; under‑pressurizing with a floppy midsection can leak power and irritate the back. The “just right” zone is rhythmic pressurization that matches the four phases of the stroke.

 

Now let’s translate physiology into an “erg pacing breath” you can actually use. In UT2 (easy steady, 18–20 spm), adopt a 2:1 breath‑to‑stroke ratio: inhale softly through the nose during the slide up, exhale through pursed lips during the drive and early recovery. In UT1 (moderate steady, ~20–24 spm), keep 2:1 but shorten the inhale and let the exhale lengthen through the drive, emphasizing paced exhalation to avoid breath stacking. In AT (threshold), many rowers shift toward 1:1 naturally; keep the exhale controlled, not explosive, to maintain CO₂ and avoid dizziness. In TR and race pace, the ratio can alternate 1:1 and “1.5:1” micro‑patterns across 10–20 strokes; that’s normal. The anchor is a paced exhale that finishes before the blade (or handle) finishes the drive, so you’re not trying to exhale against a braced trunk. This mapping lines up with common training zones and stroke rates used by clubs and Concept2 guidance, where PM5 heart‑rate integration helps you keep honest intensity.¹⁵⁻¹⁷

 

To keep the cadence steady, prioritize respiratory frequency (breaths per minute) over chasing giant tidal volumes. There’s growing evidence that breathing frequency is a sensitive marker of effort and tracks perceived exertion better than heart rate in certain contexts.¹⁸,¹⁹ For practical purposes, that means you can watch stroke rate and breaths per minute together to catch “panic breathing” before it explodes your split. If your breaths per minute jump out of proportion to stroke rate and power, ease back, lengthen the exhale slightly, and re‑lock the ratio. Ventilatory efficiency metrics like the VE/VCO₂ slope and OUES won’t appear on your PM5, but they explain why this works: efficient breathing moves CO₂ with less wasted ventilation, which correlates with better tolerance and cleaner performance curves in athletes.²⁰⁻²³

 

Here’s a concise performance breathing plan you can run this week. Warm‑up (10–12 minutes): row easy at UT2, 18–20 spm, set a 2:1 ratio with nasal in, pursed‑lip out, and perform three 30‑second “overspeed breath” bouts where you keep stroke rate constant but lift breathing frequency 6–8 breaths/min for 10 strokes, then recover to baseline—this rehearses rate control without power spikes. Drills (8–10 minutes): alternate 2 minutes of 2:1 breathing with 1 minute of 1:1 at 22–24 spm, keeping exhale timed to end just before the finish; between sets, do 3–4 “diaphragm resets” off the erg (two slow nasal inhales, long hissed exhale, one normal breath) to relax accessory muscle tension. Main piece examples: (a) Threshold 3×8 minutes at AT with 2 minutes easy; hold 1:1 at race‑minus‑6 spm and cue “exhale through drive, finish breathing early”; (b) 2k rehearsal 4×500 m on 1:1 rest; start each rep with 10 strokes at 1:1, settle 20 strokes with occasional 2:1 to smooth, then last 10 strokes free but keep the exhale paced. Cooldown: 6–8 minutes easy at UT2, 2:1 breathing, add 3 short nasal‑only minutes to de‑throttle breathing and restore CO₂.

 

If you prefer concrete cues, steal these: “Slide in on the inhale; send the boat on the exhale.” “Finish the breath before the finish.” “Longer out than in when the legs are loud.” “Don’t Valsalva the catch.” Keep the humor too: imagine your exhale is the “swoosh” that pays the split—no swoosh, no pay.

 

Measurement sharpens behavior, so track what matters. On a Concept2 PM5, pair a chest strap and record stroke rate, power, and heart rate; add a simple metronome app or on‑wrist respiratory rate when available. For testing, a 6‑minute time trial is a valid proxy for row fitness and lets you compare breathing notes across months.²⁴ If you have access to cardiopulmonary testing, ventilatory efficiency (VE/VCO₂ slope or nadir) and breathing frequency trends across thresholds provide objective context for your training response—recent work in elite athletes shows these measures differ by sport and sex and can change how clinicians interpret “normal.”²⁵,²⁶ You don’t need lab numbers to benefit, but the concepts explain why a calmer, paced exhale often produces steadier power.

 

Let’s talk about limits and risks bluntly. Forcing a single breathing pattern on everyone doesn’t pass the evidence test; short trials in novices show no economy benefit, and coupling appears to emerge with skill and repetition.²,¹ Many athletes will settle into a pattern that fits their stroke rate and anthropometrics. Over‑emphasizing long breath holds or aggressive CO₂ tolerance work can cause lightheadedness and impair technique; in some protocols, end‑expiratory breath holds reduced oxygen saturation and increased effort cost.⁷ Hyperventilating to “charge up” a piece can drop CO₂ and reduce cerebral blood flow; it feels stimulating and then suddenly feels wrong.⁴,⁵ If you get throat tightness, stridor, or a hard “block” to airflow, consider EILO evaluation with continuous laryngoscopy; this is common in athletes and turns up in rowers too.¹⁰⁻¹³ If you have asthma, anemia, cardiovascular disease, or a history of syncope, stick to conservative breathing drills and discuss plans with a clinician who understands sport.

 

What about the emotional side—the nerves at the start line, the chatter in the last 500 m? Breath pacing is also a self‑talk anchor. During the sit‑ready, take two slow nasal inhales and two long, quiet exhales to steady your hands. In the fly‑and‑die moment at 1,500 m, cue “finish the breath before the finish,” not “push harder.” It keeps form when the screen dares you to implode. Many athletes find that linking exhale to drive becomes an anti‑panic loop—combative enough for racing, calm enough to keep the head clear. That matters when the crowd is loud and your legs are louder.

 

Coaches can slot this into weekly structure without destroying the plan. Make Monday UT2 the “ratio rehearsal” day. Attach a simple breathing note to Thursday threshold (e.g., 1:1 with early exhale). In testing weeks, rehearse the exact start‑piece breathing during warm‑ups so race day feels familiar. If your crew uses video or the PM5 force curve, look for breath‑timing errors at the catch that coincide with power leaks or back rounding, then adjust cues rather than cranking volume.

 

Two more evidence‑based nuggets. First, inspiratory unloading can transiently improve rowing performance and reduce inspiratory fatigue; in a controlled lab setup, positive pressure ventilation increased distance rowed versus no assistance in trained men, with less post‑exercise inspiratory strength loss.²⁷ You won’t race with a ventilator, of course, but it reinforces the point: respiratory muscle load is real, trainable, and worth planning for. Second, locomotor–respiratory coupling patterns appear robust even when breathing frequency changes under fatigue in other endurance sports; trained athletes keep the link, which hints that once you own the pattern, stress won’t easily break it.²⁸ That’s exactly what you want on a bad day in a headwind.

 

Where does this leave you? Start with a 2:1 ratio in easy work, shift toward 1:1 as stroke rate rises, and keep the exhale paced and finished by the end of the drive. Measure what you can, especially respiratory rate alongside stroke rate, and use short drill sets to practice changes on command. Respect CO₂: avoid pre‑piece hyperventilation, and treat breath‑hold or CO₂‑tolerance drills as optional, carefully dosed tools, not default training. Watch for airway red flags. Above all, make breathing a part of your technique vocabulary, right next to handle path and body angle. Do that, and you’ll row steadier, think clearer, and spend fewer meters wrestling the screen.

 

If you’re ready to apply this today, pick one steady piece and one threshold piece this week. Log your breath ratio, average respiratory rate (if you can capture it), and any moments you felt panicky or calm. Adjust next week based on those notes. If you coach, brief the crew with three short cues and collect two observations per athlete after the session. Small, consistent steps beat complicated “systems.”

 

Have thoughts or data of your own? Share them. Training culture improves when athletes compare notes and coaches test ideas in daylight. If this helped you hold splits or breathe easier under pressure, pass it on to someone who still looks like they’re fighting a vacuum at 1,250 m.

 

References

1. Mahler DA, Hunter B, Lentine T, Ward J. Locomotor‑respiratory coupling develops in novice female rowers with training. Med Sci Sports Exerc. 1991;23(12):1362‑1366. PMID:1798378.

2. MacLennan SE, Silvestri GA, Ward J, Mahler DA. Does entrained breathing improve the economy of rowing? Med Sci Sports Exerc. 1994;26(5):610‑614. PMID:8007810.

3. Siegmund GP, Edwards MR, Moore KS, Tiessen DA, Sanderson DJ, McKenzie DC. Ventilation and locomotion coupling in varsity male rowers. J Appl Physiol. 1999;87(1):233‑242. PMID:10409580.

4. Ogoh S, Ainslie PN. Cerebral blood flow during exercise: mechanisms of regulation. J Appl Physiol. 2009;107(5):1370‑1380.

5. Marsden KR, et al. Aging blunts hyperventilation‑induced hypocapnia and reduction in cerebral blood flow velocity during maximal exercise. J Appl Physiol. 2011;110(5):1469‑1479.

6. Cross TJ, et al. Dynamic cerebral autoregulation is acutely impaired during maximal voluntary apnoea. PLoS One. 2014;9(2):e87598.

7. Woorons X, et al. Effects of different hypoventilation training programs on aerobic and anaerobic performance in runners. Int J Sports Med. 2008;29(3):224‑232.

8. Moris JM, et al. A framework of transient hypercapnia to achieve an exercise stress‑test. Clin Pract. 2023;13(4):100189.

9. Volianitis S, et al. Inspiratory muscle training improves rowing performance following 11 weeks of training in competitive female rowers. Med Sci Sports Exerc. 2001;33(7):1189‑1193 (study details summarized in manufacturer brief).

10. Clemm HH, et al. Exercise‑induced laryngeal obstruction in athletes. Open Access J Sports Med. 2022;13:1‑14.

11. Panchasara B, et al. Rowing‑induced laryngeal obstruction: first descriptions in competitive rowers. Clin Med. 2015;15(5):480‑483.

12. Hall A, Thomas M, Sandhu G, Hull JH. Exercise‑induced laryngeal obstruction: a common and overlooked cause of exertional breathlessness. Br J Gen Pract. 2016;66(650):e683‑e685.

13. Halvorsen T, et al. Inducible laryngeal obstruction: ERS/ELS statement. Eur Respir J. 2017;50(3):1602221.

14. Hodges PW, Gandevia SC. Changes in intra‑abdominal pressure during postural and respiratory activation of the human diaphragm. J Appl Physiol. 2000;89(3):967‑976; Hodges PW, et al. Contraction of the human diaphragm during rapid postural adjustments. J Physiol. 2001;537(Pt 3):999‑1008.

15. Concept2. Performance Monitor (PM5) Support. Accessed October 14, 2025.

16. British/club practice resources on UT2/UT1 bands and heart‑rate guidance (e.g., Leicester Rowing “Indoor Rowing Training Guide,” Version 2).

17. Ojeda ÁH, et al. Six‑minute rowing test: a valid and reliable method for assessing rowing performance. PeerJ. 2022;10:e14060.

18. Nicolò A, Massaroni C, Passfield L. Respiratory frequency during exercise: the neglected physiological measure. Front Physiol. 2017;8:922.

19. Nicolò A, et al. Ventilation and perceived exertion are sensitive to changes in exercise tolerance. Front Physiol. 2023;14:1226421.

20. Phillips DB, et al. Measurement and interpretation of exercise ventilatory efficiency. Front Physiol. 2020;11:659.

21. Kasiak P, et al. Is the ventilatory efficiency in endurance athletes different? J Clin Med. 2024;13(2):490.

22. Squeo MR, et al. Exercise ventilatory efficiency in elite athletes assessed for Paris 2024. J Clin Med. 2025;14(13):4655.

23. Arena R, et al. Development of a ventilatory classification system in heart failure based on VE/VCO₂ slope. Circulation. 2007;115(18):2410‑2417.

24. Ojeda ÁH, et al. Six‑minute rowing test validity and reliability. PeerJ. 2022;10:e14060.

25. Kasiak P, et al. Oxygen uptake efficiency slope in endurance athletes (NOODLE study). Front Physiol. 2024;14:1348307.

26. Komici K, et al. Ventilatory efficiency in post‑COVID‑19 athletes. Physiol Rep. 2023;11:e15795.

27. Gonçalves TR, et al. Positive‑pressure ventilation improves exercise performance and attenuates inspiratory fatigue in rowers. J Strength Cond Res. 2021;35(1):189‑196.

28. Stickford ASL, et al. Runners maintain locomotor–respiratory coupling following fatiguing hyperpnea. Eur J Appl Physiol. 2015;115(10):2107‑2118.

 

Call to action: try the plan above in your next two sessions, note your breath ratio and any moments of calm or chaos, and share one finding with a teammate or coach. Small, shared experiments build better habits faster than hidden hunches. Strong finish: master the breath, and the boat—and the split—will follow.

 

Disclaimer: This educational content does not constitute medical advice and is not a substitute for professional evaluation, diagnosis, or treatment. Consult a qualified clinician before changing your training, especially if you have respiratory, cardiovascular, or neurological conditions, are pregnant, or have a history of fainting. Stop training and seek care if you experience chest pain, severe shortness of breath, throat tightness, dizziness, or fainting.