Whether it is better to use 4 rounds or 8 rounds of magnetic therapy sticks in the gym depends mainly on personal fitness needs and preferences. Four-wheeled magnetic therapy sticks are usually more flexible and suitable for faster movements, such as rapid rolling or sliding. They are smaller, lighter, easier to manipulate, and can massage and relax specific parts more accurately. If you pay attention to flexibility and targeted massage, 4-wheel magnetic therapy stick may be more suitable for you. Compared with four rounds, eight rounds of magnetic therapy stick is more stable and more suitable for a wide range of massage, such as large muscle groups or large areas of massage. They have a larger rolling area and can provide a wider range of stimulation and massage effects. If you need a large area massage, or want a more comprehensive muscle relaxation effect, 8-wheel magnetic therapy stick may be more suitable for you. To sum up, the choice of 4-wheel or 8-wheel gym magnetic therapy stick should be decided according to personal fitness needs, goals and preferences.