Fitness required for the Stok Kangri Summit Age:Â 14 min. and 50yrs, Beyond 50 we will need to validate the Trekker Past experience in trekking:Â Useful. Fitness: Stok Kangri Summit requires the trekker to be in top physical condition before you start the trek. The temperature variations between the day & night vary anywhere between 15ÂºC. Hence it is very essential to have a fit body & mind.Â You must be able to jog 4.5 km in 30 minutes or walk continuously in 15Âº incline for atleast 1 hour. LUNGSÂ â€“ Push your lungs, Most critical work in any high altitude trek is of.