I hit the gym daily and I have trek experience. Why these prerequisites?
Every time you go to high altitude, your body reacts differently. Your body is not acclimatised because you did a trek sometime ago. You lose your acclimatisation to a certain altitude within two weeks of being back at sea level. Even the most experienced trekkers get hit by AMS. Read about Sandhya, one of the most experienced women trekkers in India, 28th high altitude trek here: https://indiahikes.com/how-i-dealt-with-acute-mountain-sickness-on-my-28th-trek/
As for the gym, it depends on what you work on. What would help you on high altitude trek are cardiovascular exercises, leg and core strengthening. These are the areas you need to work on for a trek. Your cardiovascular strength/lung power is what helps in high altitude.
Here is a whole archive about Mountain sickness – https://indiahikes.com/tag/ams/
This is why we check your fitness regardless. We would be able to help you prepare for a high altitude trek.
I run on the treadmill. Can I just send you a picture of my time on treadmill?
There is a huge difference in running on a treadmill and running out in the open. We suggest that you run outside and make a habit of it. Your legs need to get a feel of hard, uneven ground. This becomes important. After all, you will be trekking out in the open.
But if it is impossible, you can send us a screen shot of your run on the treadmill.
Is there a fitness regime you would recommend for my trek?
We have designed the perfect preparation chart for you. These fitness charts are not the regular ones you find online. These routines are trek specific and are designed to prepare you for the grade of trek you are doing.
Our senior Trek Leaders and members of our team have tested these routines. We have different routines for easy, moderate and difficult treks. It is spread over 4 weeks. Here’s the fitness chart :