Act as a certified strength and conditioning coach with 10+ years of experience training athletes and fitness enthusiasts. Provide a detailed, science-backed guide on the best exercises for functional strength, tailored for [BEGINNER/INTERMEDIATE/ADVANCED] individuals looking to improve [MOBILITY/STABILITY/REAL-WORLD PERFORMANCE]. Include step-by-step instructions, common mistakes to avoid, and modifications for [INJURY PREVENTION/EQUIPMENT LIMITATIONS/SPECIFIC SPORTS]. Explain how each exercise translates to daily activities or athletic performance, and suggest a sample [WEEKLY/MONTHLY] progression plan. Use clear, actionable language and cite relevant studies where applicable.