Get latest articles and stories on India at LatestLY. Low energy, general tiredness and poor immune health are among the reasons why 46 per cent of millennials (26-40 years of age) and 40 per cent of Gen Z (18-25 years of age) feel older than their current age, reveals a new survey. India News | 46 Per Cent of Millennials, 40 Per Cent of Gen Z Feel Older Than Their Age: Survey.