During which Phase of OPT should the exerciser be most concerned with increasing the speed (repetition tempo) of exercises?

During Phase 5 of the OPT model, the focus is on power development, which specifically involves increasing the speed of movement or repetition tempo during exercises. This phase emphasizes the ability to generate force quickly, combining strength and speed to enhance overall athletic performance.

In this phase, training typically includes explosive movements and exercises that require a rapid execution to foster not only muscular strength but also the rapid force production needed for improving athletic capabilities. This aspect of training is crucial for athletes or individuals looking to enhance performance in activities that demand both speed and strength.

The other phases involve different focuses: Phase 4 also addresses power but is more about the application of strength rather than an exhaustive focus on speed; Phase 3 focuses on stabilization, which is centered around maintaining control and balance rather than speed; and Phase 1 primarily deals with muscular endurance, concentrating on prolonged muscle activity at a slower tempo to build endurance rather than speed.