Energy
Consider how duration and intensity influence the energy systems contributing to a session.
Core subject
Understand the systems behind a training response.
Sports physiology connects energy, circulation, breathing, muscle action and recovery. Palmus turns the vocabulary into practical reading for adults building consistent routines.
Explore cardiovascular work
Four useful lenses
Circulation
Read pulse, breathing and effort together instead of treating one metric as a complete story.
Adaptation
Expect change to emerge from repeated exposures, adequate recovery and appropriate progression.
Good questions improve good data
Was the weather different? Did sleep change? Was the device positioned consistently? Did the session feel unusually hard? These questions do not weaken a metric; they give it a setting.
Use the physiology glossary