Many people assume that they need to have athletic strength to complete a trek like Auden’s Col, which is not completely true. The athletic strength is needed but mental strength matters equally. Anyone with average physical strength and strong mental strength can negotiate the long stretches of Auden’s Col/Khatling glacier and complete the Auden’s Col trek.
To boost the physical strength, cardio (aerobic) exercises, including hiking, cycling, swimming, can help you gain fitness before the start of your trek. One important thing to consider is that the treks are not a race, so you need to maintain a gentle pace with sufficient breaks and acclimatization.