Can We Break Service Bond If Night Shift Duty Leads To Health Issues?

Night shift is there in many companies, especially with US clients. Think from the point of view the company.
It is possible to do Night shift if a person makes some adjustments in their lifestyle. Check the below links for more help:
How to Work Night Shift: 5 Steps (with Pictures) - wikiHow
6 Ways to Make Working the Night Shift Less Hazardous to Your Health - US News and World Report
Surviving Night Shift Sleep Problems and Health Effects
From your career point of view, discuss with their HR as to how long you have to do Night shift. If you can negotiate a short term time frame, it is best for you. Wait till the bond period is over and search for a new job is the Night shift continues.

Dear Guarav,
Mr.Samvedan has given right opinion. When you are not in a position to find suitable job, you have to prepare for compromise, to escape from the loss for violating the conditions of appointment that you have accepted before joining the duty. Don't waste your precious time and money in search of legal remedy. Pl have second thought and join the duty and try to convince the management after some time.
SPKR

Friend,
One sided service bonds are not enforceable in India. Some courts in india have held bonds to be illegal since it restricts the employees freedom to work freely/practise his profession - however this is usually when the 'bond period' is open ended. For specific time period of 1-2 years , at times it may be allowed by courts as some companies use time/resources to train employees , which does not apply in your case (as per your version). No one will know till one goes to court & challenge the documents , so you can safely assume that it will not be challenged.
All said & done , consult a lawyer with your complete set of documentation before making any decision.
Best wishes,
Sourav Mukherjee