Body Weight
Other marker
Body Weight
Total body mass. Recorded to give context to other markers rather than judged on its own, since there is no clinically meaningful reference range for what a person should weigh.
PED Notes
Weight is deliberately left without a reference range here. What a person should weigh depends entirely on height, frame, training age and what phase they are in, so flagging a bodyweight as high or low would be meaningless. It is tracked because it changes how other numbers are read. Creatinine scales with muscle mass, which is exactly why a lean 110kg lifter can show a creatinine that looks alarming on a standard range and why Cystatin C is the better kidney marker in this population. Several compounds are dosed per kilogram, so a weight recorded alongside your bloods makes those doses reconstructable later. On GLP-1 medications weight is the outcome measure, and pairing it with HbA1c and lipids shows whether the metabolic improvement tracked the weight loss. Blood pressure falls by roughly 1 mmHg per kilogram lost in people carrying excess weight. Read the trend rather than any single reading: day-to-day swings of 1-3kg are water, glycogen and gut content, not tissue. Weigh yourself the same way each time, ideally first thing in the morning after the toilet and before eating or drinking.
Reading the number honestly:
- Daily swings of 1-3kg are water, glycogen and gut content. A single reading tells you almost nothing.
- Use a weekly average against the previous week rather than comparing one morning to another.
- Carbohydrate intake, sodium, creatine, and any compound causing water retention all move the scale without changing tissue.
What weight adds to your bloodwork:
- Kidney markers. Creatinine rises with muscle mass, so a muscular athlete often reads high on a standard range without any kidney problem. Cystatin C is independent of muscle mass and is the better test here. Recording weight makes that argument concrete rather than assumed.
- Blood pressure. Roughly 1 mmHg of systolic reduction per kilogram lost, in people carrying excess weight. See Systolic BP.
- Glucose and lipids. Weight change is usually the strongest driver of movement in HbA1c, Triglycerides and HDL. Interpreting a lipid panel without knowing whether the person gained or lost 8kg since the last one misses the most likely explanation.
- Dose per kilogram. Several compounds are dosed by bodyweight, so having weight recorded against the same date as your bloods makes a protocol reconstructable months later.
Rapid unintended loss is a different matter:
- Losing weight without trying, particularly more than 5% of bodyweight over 6-12 months, warrants investigation rather than tracking. Check TSH, Glucose and a full blood count, and see a clinician.
Contest prep and dehydration:
History Chart
Reading History
Frequently Asked Questions
Reference Ranges
Standard Range
Not available