Activate You(th) tackles the urgent youth health challenge of sedentary, screen-heavy living by equipping 18–30-year-olds to build sustainable, enjoyable physical activity anchored in nature and everyday life. Our goal is simple and evidence-informed: help young people replace long sitting hours and passive scrolling with short, low-barrier movement that lifts mood, sharpens focus, improves sleep, and protects long-term health. From a youth-work perspective, we turn “be more active” into concrete, doable routines—walking, hiking, cycling, outdoor fitness, light team games, and beginner paddling where available—paired with peer support, playful challenges, and daily reflection. The project shows that physical activity does not require elite performance or expensive gear; it thrives on adaptable sessions that fit different bodies, moods, and schedules. Participants co-create graded options and “rain plans,” learn conversation-pace effort, and practice warm-up/cool-down and recovery so movement feels safe and repeatable. Inclusion is built in: mixed-ability groups, buddy pairs, quiet-space choices, translation support, and loaned kit lower barriers for youth with fewer opportunities. Rotating micro-leadership roles—route leader, motivator, timekeeper, safety buddy—turn every outing into a leadership lab where participants learn to plan and brief a route, set regroup points, manage pace, and make go/no-go decisions using weather checks, route grading, and basic water safety (PFD rules, shore signals). The exchange links health to environment through Leave No Trace, waste-light operations, refill points, and active travel nudges, reinforcing that caring for paths, parks, and riversides protects the very places that make daily movement possible. Learning is non-formal and practical: each activity starts with a short safety and inclusion briefing and ends with a quick debrief; teams document progress with route cards, role matrices, and safety/stewardship checklists. These tangible proofs feed into Youthpass across the Key Competences—personal/social/learning to learn (self-monitoring, resilience), citizenship (fair play, consent, respect for shared spaces), digital (purposeful phone use for safety and coordination), literacy (clear instructions and reflection notes), entrepreneurship (planning micro-events with minimal resources), cultural awareness (adapting games and routes to context), multilingual (visual prompts and peer interpretation), and basic mathematical/scientific reasoning (timing, distance, hydration, heat/cold management). Intercultural evenings and a co-created “EU Values in Motion” code make dignity, equality, participation, and respect visible in everyday behaviour on the trail and water. To convert a one-week mobility into lasting behaviour change, we pair skills with habit tools: personal “carry-on” plans (easy/standard/advanced), two buddy check-ins per week, and simple trackers that link activity to mood and sleep so benefits stay salient. Each country prepares at least one open community session within 60 days—a park loop, greenway ride, outdoor circuit, or riverside clean-up plus movement—using ready-to-run recipes (90 minutes, roles, kit, risk checks) stored in a shared Drive so youth workers, schools, and clubs can replicate with minimal effort. Follow-up calls troubleshoot barriers (weather, gear, language) and celebrate “tiny wins,” while partners connect participants to local routes, venues, and supportive organisations for continuity. Concretely, our objectives are to reduce sedentary time and increase weekly active minutes through low-cost, nature-based sessions; to grow confidence so every participant can lead at least one micro-role and deliver a basic safety/inclusion brief; to strengthen social connection and belonging via buddy systems and mixed-ability pacing; to embed stewardship habits that keep shared spaces clean and welcoming; and to create a lightweight toolkit and peer network that sustain action after funding ends. Success means more young people moving most days of the week, feeling capable of inviting a friend, and knowing how to keep sessions safe, inclusive, and respectful of the environment. It also means youth workers holding a practical, open set of templates they can drop into regular programming, and communities seeing visible, beginner-friendly activity continue in parks and along rivers. In short, Activate You(th) addresses the sedentary lifestyle head-on by making physical activity small, social, safe, and easy to repeat, turning European values into motion and public nature into a welcoming “gym” that young people will keep using—and caring for—long after the exchange.