Throughout the STAR TREK franchise, we even see paunch on characters in the Command ranks. As well, some in Starfleet are beyond old. What about military preparedness? Combat readiness? Do no Physical Fitness Standards apply in the 23rd and 24th Centuries? Mister Scott, for example, couldn't (realistically) be expected to chase a Bad Guy through the corridors of the Enterprise, after TMP. He'd be winded, before he got 10 yards ...