Concept2 PM5 force curves in your browser

About you

All of these are optional, and you can add them later from Settings. Mass and maximum heart rate give the fitness estimates. The easy-row ceiling is the heart rate you aim to stay under on easy rows, such as the top of zone 2; the reports use it for the watts you hold there and the time you spend above it. Nothing leaves this browser.

mass (kg) max heart rate (optional) resting heart rate (optional) easy-row ceiling, bpm (optional)

What to show while you row

MinimalTime, distance, pace, rate, heart rate and peak force, and the force curve StandardEvery tile, the force curve and its shape measures, and the trend charts EverythingAll of that and the stroke-by-stroke table

You can change any part of it later from "Change the display" while rowing.

Each row's files

When a row is saved, the page also saves its raw log, session JSON and FIT file. The row stays in this browser too, and History has its files at any time.

Download themTo the browser's downloads folder Save them to a folder You choose the folder once. On a later visit Chrome may ask again for access: choose "Allow on every visit" and it stops asking. Don't save filesKeep rows in this browser only

The classic page has everything on one long page instead, with the same saved rows and settings.

Connect

Replay a saved log

How it works

Record a Concept2 PM5 from this page: every stroke's force curve, live, with nothing to install. Rows are kept in this browser and leave it only as files saved on your own computer or phone. Nothing is sent anywhere.

Close ErgData and any other rowing app: the PM5 talks to one app at a time, and a Bluetooth symbol on its screen means something is still connected.
Wake the PM5 by pressing a button, then press Connect to PM5 and pick it from the list.
Set up a piece below if you like, row, and end the piece on the monitor (Menu). It is saved here a minute or so after the PM5 reports the end.

Heart rate appears only when a belt or watch broadcast is paired with the PM5 itself.

This is a hobby project, not coaching or medical advice. The shape targets are guides from published rowing research, the fitness numbers are rough estimates, and rowing hard carries the usual risks, so row within your own limits and talk to a professional about your health. The software is offered as is, under the MIT licence, and its authors accept no liability for its use.

Today's row

Just rowSet nothing; row, and end the piece on the monitor Set a piece on the monitorA distance, a time, splits or intervals A guided sessionSpoken instructions, and a report at the end

Force curve

Curve Smoothing Compare to

this stroke last 8 strokes session average reference

Curve shape, this stroke

Targets RP3 bands mass kg

Stroke	Drive m	Drive s	Recov s	Ratio	Dist/stroke m	Peak lbf	Avg lbf	Work J	Power W	Peak pos	Rect idx	HR

Row finished

Guided session

Fitness

what these numbers meanThe watts at a heart rate near the one you rowed at is the number to trust. The VO2max is a model estimate and has not been checked against a laboratory measurement.

This piece over time

Saved rows

none yet

The session JSON has every stroke with its force curves; the raw log has every Bluetooth message and can rebuild the session later.

Add rows from files

About you

What to show while you row

Each row's files

Connect

Today's row

Guided session

Force curve

Curve shape, this stroke

Row finished

Guided session

Fitness

This piece over time

Saved rows

Fitness and progress