Varshitap is generally followed very strictly by Jain practitioners who undertake it, because it is a serious vow of austerity and discipline.

In simple terms:

• It is not a casual practice.
• It is usually done with deep faith, preparation, and guidance.
• The person follows a pattern of alternate fasting and taking food on alternate days for about 13 months.
• During this time, one tries to maintain ahimsa, self-control, humility, and detachment.
• It is often observed with careful planning, and many people follow it according to their guru, tradition, and physical capacity.

However, in Jain Dharma, the emphasis is not on mere outward strictness alone, but on:

• inner purity
• right intention
• discipline without pride
• observance according to one’s strength

So, the answer is: those who undertake Varshitap usually follow it very faithfully and strictly, but always within the limits of their health, guidance, and Jain discipline.

If you want, I can also explain:

• the rules of Varshitap
• the daily pattern
• or the difference between Varshitap and other tapas.