Weekly volume builders that respect the 10% rule, 5k-to-marathon equivalent pace maths, honest load and rest-day checks, season countdowns, team budgets, shoe-replacement timing and plain-spoken training guides β type your sports question and get a straight answer in seconds, with real numbers you can plan a week around. The full detailed report costs less than a coffee: $2.95.

Most training plans fail in the first big jump: motivation says double the mileage, and the body sends the bill a fortnight later. This builder plans the jump instead β it takes your honest current weekly volume and the weeks you have before your goal, then lays out a week-by-week ramp that respects the classic 10% rule: three weeks of steady 10% increases followed by a cutback week at roughly 70% of the peak, repeated until race day. It works in any unit you like β miles, kilometres or hours β as long as you stay consistent. You get every week's target, the peak week, the built-in cutbacks and a plain verdict on the rhythm, so the plan fits your life rather than the other way round.
Build a week-by-week training plan for running, biking or swimming that respects the 10% rule β three weeks of steady 10% increases followed by a cutback week, so your volume climbs without climbing over a cliff.
It is a guideline, not a law β but it is a good one. Increasing total weekly volume by more than about 10% is where joints, tendons and the immune system start complaining. The builder applies it honestly, including the cutback weeks that real plans use to consolidate progress.
Any unit you actually train in β miles, kilometres or hours β as long as you use the same unit every week and count all training of that type, not just your main sessions. The percentage maths works identically in any consistent unit.
Resume at the volume you actually completed, not the volume the plan imagined β that is the honest version of the 10% rule. After any big interruption such as illness or a month off, restart well below where you stopped and rebuild from there.
Every tool answers instantly from our own knowledge and calculators β no AI wait, no account. Honest maths and plain guidance, always educational and never medical: training is a long game of consistent, sensible weeks, and these tools exist to keep your plan realistic and your body in one piece β not to sell you a miracle programme. Results are estimates and reflections, not diagnoses or prescriptions, and nothing you type is stored. Want the deeper, personalised version? Each has a $2.95 full report.