Not that fit. If you don’t bother walking up-stairs and can walk for a few hours at a time, this trek is for you.
That’s not to say, it will be easy each day – you can be exhausted and your legs might get hurt. But if you take slow pace and take some day with acclimatization, drink enough water and listen to your body, you can make it with no major issues.
Engaging yourself in cardiovascular exercise, leg training, aerobic exercise and short hiking few weeks prior the trek would be the wise decision. It boosts up your strength and stamina.
Note: Because of some steep uphill and downhill trail route, rocky paths and rock steps, Manashlu Circuit trekking would not be appropriate for anyone with knee problems or weak ankles. Anyone with the problem of heart or lungs must consult the doctor prior the trek. Be noted that the medical facilities are very basic on the trail.