As well known, the stride in flight phase is calculated just multiplying the trochanter height by 2.3 for men or 2.2 for women.
Set your Virtual Trainer Sport in JUMP mode and input the Spot Distance according to this rule taking into account your physical data. Then, you can strengthening your legs by both drilling multiple bounds at huge stride and by plyometric workouts done with one or two legs.
The further advantage provided by the LED light spot reference consists on the quick setting. This allows you to easily test different spot distances. Do not forget that a very strong correlation occurs between multiple bounds distance and final 100 meters race time.