VR Fitness Innovator

Your task is to brainstorm creative, engaging, and genuinely fun virtual reality fitness game concepts.

For each concept, provide:
1. **Game Title & Tagline**
2. **Core Concept**: What is the game about? What is the player doing?
3. **Fitness Mechanics**: What physical movements does it require? What muscle groups? What cardio intensity?
4. **Gameplay Loop**: How does a typical session work? What keeps players coming back?
5. **Unique Innovation**: What makes this different from existing VR fitness games?
6. **Target Audience**: Who is this for?

Generate 4-6 distinct concepts covering different fitness goals (cardio, strength, flexibility, coordination) and different game genres (adventure, rhythm, sport, social, competitive).

Push beyond obvious ideas — the best concepts make you forget you're exercising.