Concept2 Erg Tool for Irish Crews

Reading a 500m split off the PM5 monitor

Split is the projection metric every Concept2 ergometer in an Irish boathouse runs on. It is the finishing time the monitor predicts for the next 500 metres if the upcoming strokes match the recent strokes. Smaller number, faster boat. Pulling 1:42.5 means the next half-kilometre is on track for 1 minute 42 and a half seconds, and a flat-out 2k at the same effort would land on 6:50. Squads at Skibbereen, Commercial, UCD, Trinity and NUIG capture splits stroke-by-stroke through the PM5 because the season-long trend exposes things a paper logbook quietly hides. Squad-wide erg telemetry only delivers when the data is captured automatically.

Turning 500m split into watts on a Concept2 RowErg

Concept2 ties pace to power through a single cubic relation: P = 2.80 / (sec_per_500 / 500)^3. The cube on the denominator is brutal. Halve the pace number and watt output goes up by a factor of eight, which is why the climb from a 1:50 toward a 1:40 costs roughly four times the energy of the climb from a 2:00 toward a 1:50. Irish programmes that benchmark on watts (rather than leaning on split alone) spot lightweights overreaching on short pieces and openweight athletes coasting on long ones, then feed the corrected scores into the squad practice record.

Where the kcal/hr figure on the PM5 actually comes from

The Concept2 PM5 lifts watt output into an hourly kilocalorie estimate via kcal/hour = 4 x watt_output + 300. The standing 300 represents resting metabolic rate during exercise. Identical arithmetic drives the kcal column on this tool, so the displayed value matches the on-screen reading mid-piece and ties into the weekly volume totals the coach dashboard rolls up across a winter erg block at the National Rowing Centre or the long build toward Irish Champs. Real burn rate shifts with body mass, muscle composition and boathouse temperature, so use the figure as a session-to-session training-load proxy rather than a dietitian-grade calorie ledger.

Swapping pace for time and back again

A converter does two jobs at once. Hand it a split and it returns finishing times across every test distance. Hand it a finishing time at one distance and it returns the average split that produced it. Both directions reduce to a single line of arithmetic: finishing time equals split multiplied by the number of 500-metre segments in the distance. Worked through at a 1:48 setpoint, that lands at 7:12 over the Olympic 2k, 18:00 across 5k and 21:36 across the 6k. The form above runs both directions instantly and stamps matching watt and kJ figures alongside each row.

Behind the longer-distance predictor

For longer pieces we lean on the Riegel endurance relation: projected time equals base time multiplied by the distance ratio raised to a 1.06 fade exponent. That exponent is the canonical fade observed across running, swimming and rowing test data, and tracks Irish erg scaling cleanly in practice. Treat the output as the opening conversation, not the verdict. Lightweights and Junior athletes usually fade harder than the curve suggests, while big aerobic engines (a 95kg heavyweight stroke seat, a Rowing Ireland shortlisted lightweight with a decade of base behind them) hold pace better than the model predicts. Use the projection to open the chat with the coach about realistic 6k or Inniscarra goals, then sharpen it once a real long piece is on the books.

The five intensity bands an Irish programme actually runs

Rowing Ireland coach pathways and most IURC and club squads run a five-band weekly structure pegged to the 2k split. Numbers below are typical setpoints (rate, then pace offset relative to your 2k):

• UT2 - steady aerobic: rate around 18-20, sit roughly 12 to 15 seconds slower than race pace per 500.
• UT1 - firm aerobic: rate around 22-24, run about 8 to 10 seconds slower than race pace per 500.
• AT - anaerobic threshold: rate around 26-28, hold within 4 to 5 seconds of race pace per 500.
• TR - transport (race pace): rate climbs into the 30-34 band, pace lands on the 2k split itself.
• AN - anaerobic: rate above 36, splits drop below 2k pace, usually short pieces only.

Once the 2k split is locked in, every other zone falls out of it. The standard fix when the 2k is months stale is to drive a recent long aerobic piece through the predictor table, take that as the working figure, and feed it into the training pace tool to lift out the splits, rates and watts a coach actually writes on the whiteboard.

Indicative erg marks across Irish standard test distances

Indicative numbers drawn from real Irish programmes, framed for openweight male rowers. Rowing Ireland contenders typically shift each column down by five to fifteen seconds per 500m. Openweight female benchmarks usually run around eight to twelve seconds outside these figures. Masters and Junior categories need to be read alongside the Concept2 age-grade tables, not directly against the open numbers:

• 500m flying piece: club rowers chase 1:25, provincial shortlist around 1:20, Rowing Ireland contenders under 1:15.
• 1k: open club around the 3:10 mark, provincial squads inside 3:00, national standard inside 2:50.
• 2k Olympic test: open-club rowers chase the 6:50 mark; sharp IURC and Irish Champs 1st VIII rowers push under 6:30; Rowing Ireland shortlist opens at 6:15; national elite men sit beneath 6 minutes flat.
• 5k aerobic test: open clubs target 18 minutes flat; IURC crews chase 17; Rowing Ireland shortlisted athletes inside 16:30.
• 6k winter anchor: open clubs around 22 minutes; IURC 1st VIII aim for 20:30; Rowing Ireland openweights under 19:30.
• 10k base piece: club rowers around 38 minutes; IURC 1st VIII around 35; Rowing Ireland openweights inside 33:30.

Rowing Ireland high-performance standards sit in the same neighbourhood as the figures above. What changes between programmes is squad depth and recruiting class, not the watts on the flywheel. Junior rowers chasing Irish Champs typically benchmark against the previous year's 1st VIII trial sheet from their own club, while senior-grade athletes calibrate to IURC, Irish Champion Sculls and Rowing Ireland Olympic pathway figures. Masters crews should always push the raw split through age-graded percentiles before drawing conclusions. For a percentile-band placement with bodyweight and age handicapping built in, jump straight to the erg score percentile tool. And for back-solving a credible Olympic-distance goal off a long aerobic piece, the 2k projection utility is the next stop.