Abstract

This disclosure describes a method of dynamically gating the rest interval between exercise rounds based on real-time heart-rate recovery rather than a fixed-duration timer, with audio feedback announcing the remaining recovery distance through a consumer earbud.

At the end of each round the system records the round-end heart rate and computes a personalized recovery target as a percentage of an age-derived maximum heart rate. A minimum rest duration prevents excessively short rests when heart rate drops rapidly; a maximum rest duration prevents excessively long rests when heart rate does not recover. The next round begins when either (1) the current heart rate falls to or below the recovery target and the elapsed rest exceeds the minimum, or (2) the maximum rest duration elapses as a timeout fallback. During the rest interval, heart-rate status is announced through the earbud audio channel with the announcement frequency increasing as the user approaches the target — for example every 30 seconds when far from target, every 15 seconds when near, and a single "ready" announcement on reaching it; if the timeout fires before the target is reached, the system announces that the next round is starting with recovery incomplete.

Variations within scope include using a heart-rate recovery slope rather than an absolute target; using a heart-rate-variability or respiratory-rate recovery criterion; per-round adaptive adjustment of the recovery percentage as cumulative fatigue rises; application to non-striking interval training (rowing, cycling, running intervals); session termination after a configured number of consecutive timeout events; and announcing an estimated time-to-target derived from the current rate of heart-rate change.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

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