Segment 1: This article provides three science-backed tips to help individuals increase their pull-up repetitions from zero to 10 or more quickly. Pull-ups are a challenging exercise that require upper body strength and endurance.

Segment 2: The first tip is to focus on negative repetitions, also known as "eccentric" exercises. This involves starting in the top position of a pull-up and slowly lowering oneself down. Research shows that eccentric exercises build strength and muscle more effectively than concentric exercises.

Segment 3: The second tip is to use assistance tools such as resistance bands or a partner's assistance to gradually build strength and practice the correct pull-up form. These tools help to reduce the amount of bodyweight that needs to be lifted, thus making the exercise more manageable for beginners.

Segment 4: The third tip is to incorporate isometric exercises into the routine. Isometric exercises involve holding a specific position without any movement. In relation to pull-ups, this can be done by pausing for a few seconds at the top and bottom positions of the exercise. Isometric exercises help to improve stability and increase time under tension.

Segment 5: In conclusion, by implementing these science-based tips, individuals can increase their pull-up repetitions rapidly. Using negative repetitions, assistance tools, and isometric exercises will help build strength, improve technique, and enhance overall performance. With consistent practice and dedication, going from zero pull-ups to 10 or more is achievable in a relatively short period.