Recovery — Your Pacer Wiki

Definition

Recovery, in an endurance-training context, is the period during which the body absorbs the stimulus of recent training and rebuilds at a slightly higher capacity than before. It is not the absence of training — it is the half of training where adaptation actually occurs. A session creates the stimulus; recovery creates the adaptation.

Recovery operates on multiple timescales: the hours after a single session (muscle glycogen replenishment, autonomic rebalancing), the days around a hard day (structural repair, neural recovery), the week within a mesocycle (intentional down-weeks), and the weeks within a macrocycle (post-race recovery, transition phases).

Why it matters to runners

The most common overtraining pattern is not too much work — it is the wrong ratio of work to recovery. An athlete can sustain heavy volume indefinitely if recovery is programmed; an athlete on moderate volume with inadequate recovery breaks down quickly. The arithmetic of fitness and fatigue, captured in ATI and CTI, is ultimately an arithmetic of recovery.

Complete rest days — "full days off" — are part of most training weeks for serious athletes. The intuition that "missing a day" is a loss is almost always wrong. The body does not cease adapting when it rests; it accelerates the adaptation it cannot complete while under load.

Your Pacer treats recovery as programmed, not earned. A recovery week is scheduled every third or fourth week regardless of how the prior weeks felt, because the body's capacity to tell you "I need a down week" is unreliable — the signals often arrive after the damage is done. HRV trend and subjective freshness are inputs, but the scheduled recovery is the default.

Signals that call for extra recovery

HRV trending below baseline for more than a few days, especially while volume is climbing.
Morning resting heart rate elevated by 5+ bpm over personal baseline.
Persistent leg heaviness that does not resolve after an easy day.
Sleep disruption or degraded sleep quality alongside normal sleep duration.
Elevated ATI relative to CTI — acute fatigue outpacing chronic adaptation capacity.
Reduced appetite, irritability, or low mood not explained by life stress.

Forms of recovery within training

Complete rest days — no structured exercise. In Japanese endurance culture, kankyū (完休) names this explicitly; in Western coaching it is simply "off".
Active recovery — very easy walking, light cycling, or swimming. The HR ceiling is well below Z1.
Recovery week — typically every third or fourth week, volume drops 30 to 50%, intensity preserved selectively.
Sleep — the single most productive recovery modality. Consistent 7 to 9 hours per night is a training tool, not optional.

Related terms

HRV — the clearest recovery signal most athletes can measure.
Training Load — recovery is the reason CTI progression is not monotone.
Periodization — recovery weeks are the periodization structure at the mesocycle scale.