Why does a running plan ask for height and weight?
Short answer
To set a safe starting load. Every stride lands with a multiple of your body weight, so your size helps the plan decide how quickly weekly running can grow. They are never used to set weight-loss targets.
Key points
- Running loads your legs with a multiple of your body weight on every stride.
- Your measurements help set how fast your weekly distance builds.
- The plan never sets a weight or weight-loss goal.
Why size matters for load
Each running stride puts a force of around two to three times your body weight through your legs. The same weekly distance is therefore a different load for different people, and so is the safest way to build it.
What the plan does with it
Your height and weight are used together, not judged on their own. They help decide how gently the first weeks start and how quickly long runs grow. Run/walk intervals may also feature for longer in the early weeks.
What it does not do
The plan does not give calorie targets, weight targets or diet advice. You can update your measurements whenever you edit your plan.
In your plan
Your measurements help set the size of week one and the pace at which your running builds. They make the start more cautious where that is safer, and nothing more.
Related questions
Why do you ask about age and gender?
Both change what a realistic plan looks like. Age changes how long you need to recover between hard sessions, and both help the plan judge how realistic your target time is.
Read the full answerWhich starting level fits me?
Pick the level that matches the last four weeks, not your best season. Between two? Choose the lower one: a plan that starts too easy can catch up, and one that starts too hard is how injuries begin.
Read the full answerWhy are rest days part of the plan?
Because fitness is built while you recover, not while you run. Training is the signal; rest is when your body responds to it. Rest days also lower the risk of the overuse injuries that end many training plans.
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