12 weeks Starts with phase one and progresses each stage while still incorporating each phase. 1) Stability 2)Strength 3) Power 4) Maintenance The Strength in Stride program is designed to flow with your run training. There are four phases in Strength in Stride: The Stability phase, which you start when you begin a new race training plan. The Strength phase, which you use in the middle of your plan. The Power phase, which flows with your race-specific and peaking run phases. The Maintenance ...