Here are some tips from the physiotherapist to prevent further damage.
Take care of your posture. Always try to sit down with your feet flat on the floor and your spine on the back of the chair. Also keep a comfortable distance between the table and the chair.
Every hour always take an interval of 5 to 10 minutes, lifting and lengthening the body, especially arms and legs, which will make you more relaxed and less tense.
In
online poker, leave your monitor at least 50cm away from your eyes and when using the mouse, avoid doing it with your fist alone. Always support the palm of the hand and arm to avoid pain in the shoulder and neck.
All this may not seem very important, but it will make a lot of difference in your physical and mental stress.
Your body will thank you and your poker results, with better quality of life, tend to improve considerably.