Julie Germaine Fitness Client Sweat-Loss Assessment

  • First, you will need a reliable scale, ideally digital. To determine client sweat rate, always weigh twice for reliability confirmation.
  • Clients should weigh themselves privately without wearing any clothing. (This is because sweat trapped in clothing will cause an underestimation of sweat losses.)
  • Weigh yourself before your workout and again after the workout. This training session should match your usual intensity and the environmental conditions. Sweat rates remain very consistent if environmental and exercise intensity are always similar.
  • One hour of exercise provides a good gauge for estimating sweat losses of shorter- or longer-duration training bouts.
  • If at all possible, please avoid using the restroom after your first weigh-in and before your final weigh-in. This helps us get the most accurate sweat-loss assessment.
  • Fluid intake must be accounted for, so please make note of exactly how much water or other fluid you consumed during your workout.
  • Do not consume food during this process. It is difficult to account for the water intake of these foods using this sweat-loss assessment method.
Calculating Sweat Loss

Initial weight  _______________ kg

– post-weight in  _______________ kg

+ fluid consumption between weigh-ins  _______________ kg

– urine volume   _______________ kg

Sweat-loss volume  _______________ kg (L)

Example Calculation

Missy ran for 1 hour at a pace of 8 minutes per mile in 74 °F weather with low humidity. Her nude, pre- and post-weights were 70.0 and 68.5 kilograms, respectively. She drank 0.350 kilograms (liters) of water from her bottle. She did not use the restroom during her run.

Initial weight  70.0 kg

– post-weight in 68.5 kg

+ fluid consumption between weigh-ins 0.350 kg

– urine volume 0 kg

Sweat-loss volume 1.850 kg (L)