Yes, work place ergonomics says that you must sit straight, keep your laptop at eye level and many more such things, for an efficient sitting work posture.
But in fact, no human is a robot, to maintain such a posture continuously, without getting tired.
Therefore, a better idea is to practice deep breath-ins, stand and walk in between.
If any ache persists in your muscles, see a physiotherapist nearby to your home or office.
For online screenings and therapeutic guidances, one can connect with Sugar Den- The Physiotherapy Clinic, which is based at Janakpuri, in West Delhi.