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Activity Adjustments

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About

Effective weight management requires more than a simple calculator; it demands a dynamic roadmap that adapts to real-life variables. This planner operates on the principles of thermodynamics, specifically the Energy Balance Equation. It helps users establish a sustainable caloric deficit while accounting for the non-linear nature of metabolic adaptation and lifestyle fluctuations.

Unlike static tools, this system recalculates your trajectory when deviations occur, such as unplanned high-calorie events or skipped physical activity. By integrating Metabolic Equivalent of Task (MET) values, it provides a realistic estimation of energy expenditure, ensuring the plan remains mathematically viable over extended periods.

weight loss calorie deficit diet planner fitness TDEE

Formulas

The core calculation relies on the estimation of Total Daily Energy Expenditure (TDEE) and the required deficit to mobilize adipose tissue.

{
TDEE = BMR × ActivityFactorDeficit = TDEE DailyIntakeDaysToGoal = TotalLoss × 7700DailyDeficit

Note: 7700 represents the approximate energetic value (kcal) of 1 kg of body fat.

Reference Data

ActivityIntensityMET ValueBurn/Hour (70kg)
SleepingResting0.9566 kcal
Desk WorkSedentary1.5105 kcal
WalkingModerate (5 km/h)3.5245 kcal
Weight LiftingVigorous6.0420 kcal
RunningHigh (10 km/h)9.8686 kcal
CyclingModerate7.5525 kcal
HIITVery High11.0770 kcal
SwimmingLaps8.0560 kcal
YogaHatha2.5175 kcal

Frequently Asked Questions

The planner adds the unburned calories back into your "Remaining To Burn" pool. This extends your target date slightly rather than requiring you to starve yourself the next day, which is unsustainable.
MET values are standardized estimates derived from gas exchange analysis in laboratory settings. While individual variance exists due to efficiency and muscle mass, they provide a much reliable baseline than generic "low/medium/high" selectors.
No. Deficits exceeding 20-25% of TDEE often lead to muscle loss and metabolic adaptation (downregulation of NEAT). The planner caps recommended deficits to ensure safety.