Slow Flow Yoga involves a gradual warmup an taking more time to focus on alignment and mindfulness. This sequence will natrually improves strength, balance and flexibility.
The solar plexus is the area that the heart draws strength from. It's what governs your inner power and sense of self. It's located just below the bottom of the ribs and this is the focus for this Yoga Flow. As a result you'll also strengthen your shoulders and hips and legs muscles.