Intermediate Muscle Fibres: The Underrated Powerhouse They’re not just “in-between” — they’re essential. Type IIa muscle fibres (aka intermediate fibres) are the perfect blend of strength and endurance. They help you: • Generate power • Maintain muscular stamina • Stay functionally strong as you age As we get older, these fibres are often the first to decline — leading to slower reflexes, reduced strength, and less resilience. Train them smart. Keep them alive. Think moderate loads, explosive tempo, and repeatable effort. #ageinggracefully #longevity #longevitylifestyle #fasttwitch #kettlebells #snatch #endurancetraining #powertraining #kettlebellworkout #mobilitychallenge Your longevity and power depend on it.