Bodies adapt by developing in a way that is most appropriate to meet the demands that are placed on them.
This is called ‘specificity of training. If you sit all day, your body has little in the way of demands on it in terms of movement, so your muscles atrophy, your joints become stiff and your, bones brittle. This is the start of a vicious downhill spiral-the less you do, the less you feel like doing, and then the less you are capable of doing.
Movement actually drives your cerebellum. This is the part of the brain is responsible for coordinating voluntary movements and a number of other functions including motor skills such as balance, coordination, and posture.
Movement skills get lost not only because the joints are stiff and the muscles weak, but also because the central controller becomes ineffective. In a sense, we forget how to perform certain tasks.
Resistance training provides simple but incredibly useful movement patterns, and these patterns are applicable in tasks we perform in daily life. By repeating these movement patterns, we not only strengthen our muscles and bones, and mobilise our joints, we also re-learn how to do these movements.
Weight training is the original ‘Functional Training’. Lifting, pushing, and pulling are the basic tasks we need to perform to remain independent.