8/12/26: Zone 2 Isn't Enough for these People

Everyone's talking about zone 2 cardio for longevity. But what happens when a client can't get on a bike or hit a target heart rate because of a neurological condition?Zone 2 training — low-intensity, sustained effort — is one of the most cited longevity interventions out there. More mitochondrial density, better fat oxidation, stronger cardiovascular health. But most of that content assumes a healthy person on a treadmill or bike, hitting 60 to 70 percent of max heart rate for 30 to 45 minutes straight.For certain neurological clients, that model doesn't hold up. Heart rate response can be blunted by autonomic dysfunction or by medications like beta blockers and dopaminergic drugs. Pacing gets hard when gait is unstable or freezing episodes show up mid-session. Telling someone to 'just get on a bike for 45 minutes' isn't realistic — and it isn't always safe.Here's what actually matters: sustained, rhythmic, low-to-moderate effort that the nervous system can organize around. That's what dual-task treadmill work or a structured PowerPlate circuit can deliver — the same metabolic and mitochondrial stimulus, through a route that accounts for motor control instead of ignoring it.Zone 2 isn't wrong. It's just incomplete for certain clients. The real question isn't heart rate — it's how you get the benefit without needing perfect motor control to access it.