Trekking is a very rewarding activity, but it also demands a lot from your body. The steep ascents and descents of the great Himalayas along with the high altitude demands a good physical preparation before you hit the trail.
The more physically fit you are, the more you will be able to enjoy the beauty of the great Himalayas. If everyone in the group has a good physical fitness, it helps to keep the group together. A good physical fitness ensures the safety of the individual as well as of the whole group.
The better shape you are in, the longer and more comfortable you will be able to trek.
General Overview of how to train for trekking.
For the first one month focus on improving your general strength and flexibility. Below is the week wise schedule for the first one month training. Work 4 times a week . The rest days should be nonconsecutive.
Before beginning any training plan, check in with certified training professional.
After the first month you can follow the below mentioned schedule for the last two months. You can add more strength exercises as per your ability. Instead of jogging you can do biking, swimming or any other aerobic exercise. During the last month try doing uphill training with a 6-8 kg backpack. The below schedule is made keeping in mind those who are just starting their physical preparation and that everyone is able to follow it.
IF you have your own physical preparation schedule please keep following that.
You can include lof of strength exercises in your schedule,there is one factor more important to consider : stretching. Make sure you do stretching after the end of your work out to avoid injury and to recover quickly.