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At 41, most famous footballers are already well-established pundits or stressed-out managers with rapidly expanding waistlines.

Occasionally, you might find the odd goalkeeper who plays on after his 40th birthday. But even then, these footballing pensioners tend to be well past the prime, relying on their experience and know-how to compensate for the absence of their long-departed reflexes and agility.

Dida, however, appears to be breaking the mould.

Many of you may have assumed the former AC Milan keeper - who won two Champions Leagues and 91 Brazil caps - had long since retired.

Not a bit of it. At 41, Dida is still turning out for Internacional at the very top level of Brazilian football. And as you can see from the clip above, his reflexes and agility have gone nowhere.

The video shows him absolutely dominating an insanely difficult training drill:

It's an incredible sight: a man in his fifth decade springing back and forth in a way most 18 year-olds would struggle to match.

Give it a watch and prepare to be impressed.

Although, a word of warning. If you're getting on a bit yourself, you will probably be overcome with jealously…