Key takeaways
- The forgetting curve (Ebbinghaus) describes how quickly knowledge disappears when it is not reactivated: around 70% forgotten in 7 days.
- A “one-shot” training session delivers a lot at once, but the knowledge evaporates within a few weeks without practice.
- The answer: spaced repetition, continuous training that reactivates memory before it fades.
- BizCoach keeps the practice alive with 5 to 20 min sessions, challenges and streaks to “lift the curve back up”.
The forgetting curve, defined
The forgetting curve is a phenomenon described in the late 19th century by the German psychologist Hermann Ebbinghaus. It shows how fast new information fades from memory when it is never reactivated. The finding is brutal: around 70% of training content is forgotten within seven days (source: Ebbinghaus’s forgetting curve). In other words, most of what a sales rep learns on Monday is gone by the following Monday.
This is neither carelessness nor a lack of attention: it is how the brain normally works. Understanding this mechanism radically changes the way you design skill-building for sales teams.
How forgetting works
Memory works by arbitration. Faced with a constant flow of information, the brain keeps what it judges useful — that is, what comes back. Information encountered only once is filed as incidental and fades fast. Information reactivated several times is judged important and consolidates for the long term.
The drop is steepest right after learning: most of it is lost within the first few hours, then the first few days. That is exactly where everything is decided: if nothing reactivates the knowledge inside that window, it slips out of reach. Conversely, every well-timed reminder flattens the curve and extends how long you retain it.
Why the one-off course is not enough
The dominant model in sales education is still the one-off event: a two-day course, an annual seminar, a Sales Kick-Off. These moments genuinely help convey a method, create momentum and align teams. But faced with the forgetting curve, they run into a structural limit.
- Too much content at once. A packed day delivers dozens of techniques that memory cannot possibly retain without practice.
- No reactivation. Back in the field, the sales rep falls straight into old habits; with no reminders, the new knowledge is never consolidated.
- A return on investment that melts away. Knowledge evaporates within weeks; at thirty days, only a fraction of what was taught usually remains.
Every sales director knows what comes next: you invest in training, the energy fades, and a few months later you start over. The problem is not the training itself, but the absence of what comes after.
75% of sales reps reach their targets more easily when they train regularly. Salesforce, State of Sales 2026
The answer: spaced repetition
The answer to the forgetting curve is not longer training, but more frequent training, in small doses. That is the principle of spaced repetition: revisiting a skill at regular intervals, just before it fades, to anchor it a little deeper each time. Every recall pushes back the forgetting point and turns fragile knowledge into reflex.
This is exactly how top athletes work. Nobody imagines an athlete training two days a year then performing in competition. They repeat the same movements, again and again, until they become natural under pressure. Selling follows the same rule: it is the gap between education and training. The first transmits, the second embeds.
This is not a hunch: when practice becomes regular, results follow. According to Salesforce (State of Sales 2026), 75% of sales reps reach their targets more easily when they train. One practical difficulty remains: how do you get teams training every week without tying up a manager and a partner every single time?
How BizCoach lifts the curve again
BizCoach AI was designed as a sales training ground: a place where you come to practice regularly, not one more training course. The simulators run on real-time voice AI: the sales rep trains out loud against a simulated customer, on their real offers and real personas, as often as they want.
- Short, frequent sessions. From 5 to 20 minutes, a format that fits into the working day: what counts is regularity, not length.
- Immediate, consistent feedback. After each session, a grid of 9 to 15 criteria scored out of 10 makes progress measurable and guides the next round.
- AI Coaches at every stage. Prep Meeting before a sales meeting, Débrief Meeting after: practice fits inside the real sales cycle.
- Levers that build consistency. Challenges, tournaments, streaks and BizCoins keep the habit alive; spaced repetition made desirable.
The effect is measurable: at GL Events, the average score rises by 5 points between the first and the fifth session, and at MAIF weekly adoption exceeds 90%. By turning a one-off event into continuous training, you no longer suffer the forgetting curve: you reset it, session after session.