Conditions

Effort & Energy

Effort is the one variable you control. Denominating it in energy rather than distance or pace is what makes a hike, a ride and a walk comparable in the same week.

Instrument

Activity equivalence

Matched durations across activities at equal energy cost, in MET-hours and kilocalories.

Scope

What this section covers

Metabolic equivalents, terrain cost, green exercise evidence and the difference between outdoor and indoor training.

Field notes

Reference

EffortWhat a MET Actually Measures, and Where the Number FailsThe metabolic equivalent defined, how the Compendium of Physical Activities was assembled, and the systematic errors that make MET values approximate.
EffortGreen Exercise: What the Evidence Does and Does Not ShowAttention restoration theory, stress recovery theory, cortisol findings, and an honest assessment of the methodological limits of nature-and-health research.
EffortGradient and Surface Change the Energy Cost More Than Pace DoesThe metabolic cost of ascent and descent, why soft ground is expensive, and how carried load interacts with both.
EffortWhat Cold Exposure Does, Separating Evidence From EnthusiasmBrown adipose tissue, non-shivering thermogenesis, cold habituation, and a careful reading of what the human data supports.
EffortOutdoor and Indoor Training Are Not the Same StimulusWind resistance, terrain variability, thermoregulation and pacing differences between outdoor activity and its indoor equivalents.