Hi, a lot more should be discussed about how you plan you day and what are you activities. Because your problems are associated with posture problem.
Next Steps
A personalised Back and legs exercised are to be designed for you based on your need and problem you are facing. Also you hv not mentioned ur body weight if it is more or there's fat deposition around abdomen area, or weak abdominal/back and gluteous muscles then it has to be dealt first.
Health Tips
contact us or Any Physiotherapist for personalised and safe exercise prescription.