What an indoor session leaves behind

Every other kind of effort leaves a line. An indoor session leaves a power file and a puddle.

This is the honest limit of what we make: if there are no GPS points, there is no route, and no amount of good intentions turns a two-hour turbo into a drawing. The file will be rejected, and the message will say why rather than pretending the format was wrong.

What to print instead

The obvious answer is the route you are training for. A winter of indoor work usually exists because of something outdoors in spring, and the drawing of that thing is a far better object than a chart of the sessions that got you there.

The second answer is a tee. Indoor training is the least ceremonial thing in sport — nobody photographs it, nobody puts it on a wall — and a garment suits it better than paper does. It gets worn to the next session, which is roughly the right relationship.

Both are on sale: a tee in white or black, and a tote. The line goes on in orange, with the profile and the numbers from the poster underneath.

What changes on cotton

Less goes on it. Direct-to-garment ink sits in the weave rather than on a smooth sheet, so the fabric carries the line, the profile and the text — and the cotton itself is the background. You choose the line weight as you would for a poster.

Nothing is see-through. The printer cannot hold semi-transparent ink, so the layered heatmap stays on paper, and everything that does print is drawn in solid colour.

There is no map treatment on fabric. Streets and contours need detail that cotton cannot hold.

The rule we will not break

The second verb has to match the object. We will not print "Hang it." on a t-shirt, and not because of a style guide — because it would be a claim about the product that is not true.