One can train following ways for trek as per his/her accessible,

• Weekly minimum once or twice hiking with backpack,
• Hike on the up & down trail is far better,
• Climbing up & down at staircase, running and jugging outside,
• And one can do yoga ,Skipping and other physical exercises ect.

Its quite wise to do pre-training for mountain trek anywhere. Then one can fully enjoy the trek.