The methods behind Bilybyn

RPE tracking: measuring perceived exertion

What is RPE?

RPE (Rate of Perceived Exertion) is a score from 0 to 10 that each player gives right after a session to describe how hard it felt. It's a simple method, validated across dozens of sports science studies, and it needs no sensors, just one question asked at the right moment.

Why track RPE session after session

A single score doesn't tell you much. It's the pattern over time that makes RPE tracking useful: combined with session duration, it produces a training load figure that's comparable week to week, per player and per team. A coach can then spot an unusual spike before it turns into an injury, or notice a player who consistently under-reports effort.

RPE in basketball

In basketball, intensity swings widely from one session to the next: a skills session has little in common with a game or a conditioning block. RPE tracking lets you compare these sessions on a common scale, even without GPS or jump-monitoring hardware, a real advantage for most amateur and youth clubs.

Training load: calculation and tracking

How training load is calculated

Training load (the session-RPE method) is calculated simply as session duration × RPE. A 90-minute session rated 7/10 produces a load of 630 Arbitrary Units (AU). It's a rough number by design, which is exactly what makes the method usable day to day by a coach, with no equipment or complex analytics software.

Spotting training overload

The real value shows up when load is tracked over time: a sharp week-to-week spike, or a steady build-up without enough recovery, are well-documented overload signals in sports science literature and known injury-risk factors. A coach tracking every player's load can adjust the plan before it shows up on the court.

Indicative thresholds, adjusted by age and section

There's no single threshold that fits everyone, which is why Bilybyn's alert thresholds (sessions, minutes, RPE load) are configurable per club rather than fixed. For weekly volume (games, practices, minutes), the joint NBA and USA Basketball guidelines give concrete benchmarks by age group:

Source (youth): joint NBA & USA Basketball guidelines (youthguidelines.nba.com), with at least one day of rest from organized sport per week.

Alongside this basketball-specific table, the American Academy of Pediatrics (AAP) gives a benchmark that applies to any team sport: no more organized-sport hours per week than the child's age, with an absolute cap of 16 hours/week, at least one rest day, and 2-3 months off per sport each year.

For adults and elite athletes, volume varies too much by level for a fixed cap on sessions or minutes: the acute:chronic workload ratio (ACWR, current week's load divided by the average of the previous 4 weeks) is the reference used in sports science instead. Gabbett's research places the sweet spot between 0.8 and 1.3, a caution zone up to 1.5, a danger zone beyond that, and undertraining below 0.8. The free calculator computes all three benchmarks (NBA/USA Basketball, AAP, ACWR) from a week's sessions.

These benchmarks cover session count and hourly volume, which are easier to cap with a fixed number. Load (duration × RPE) doesn't lend itself as well to a single absolute threshold: what matters most is how it changes from one week to the next, a sharp rise compared to previous weeks remaining, in the sports science literature, the most reliable warning sign.

Automated load tracking with Bilybyn

Bilybyn automatically calculates the load of every session from the RPE and duration the coach enters, then rolls it up by week, by player and by team, no spreadsheet, with a visual flag on unusual spikes.

Athlete monitoring: the Bilybyn app

Tracking every athlete over time

A single session never tells the whole story. Athlete monitoring means watching attendance, perceived effort (RPE) and training load over weeks and months, per player and per team, so a quiet decline or a steady improvement stands out early enough to start a conversation, not just get noticed after the fact.

Monitoring young athletes and long-term development

For young athletes, long-term tracking matters even more: bodies and tolerable load change fast, and a few weeks of overreach can slow down development that plays out over several seasons. The right athlete management system helps youth clubs dose each young athlete's load instead of guessing.

Sports performance software built for clubs

Bilybyn is athlete monitoring software designed for coaches and clubs, not performance labs. Logging a session takes under a minute from the bench; trend analysis happens afterwards from a laptop, with no spreadsheet and no double entry.

Beyond basketball

The same method applies to any team sport: handball, football, hockey and more. The principle stays the same, effort, attendance and progress, tracked session after session.