When I ask patients why they aren’t exercising, the answer is almost never that they don’t believe in it. It’s time. They picture an hour at a gym they’d have to drive to, and since that hour doesn’t exist in their week, they do nothing.
The research has quietly undercut that entire framing. The gap between doing nothing and doing a little is enormous. The gap between a little and a lot is much smaller than most people assume.
What the newest data says
A 2026 study in the British Journal of Sports Medicine followed nearly 150,000 people and looked at cardio and strength training together rather than separately. The combination mattered more than either alone. People who accumulated a solid amount of aerobic activity plus roughly one to two hours of strength training per week had about a 45% lower risk of death during the study period.
Strength training on its own is worth noting too. Ninety to 120 minutes a week — that’s two one-hour sessions, or three 35-minute ones — was associated with a 13% lower risk of death from any cause compared with none at all.
And of every fitness metric we can measure, VO2 max — your body’s ability to use oxygen under load — remains one of the strongest predictors of how long you live. It also happens to be highly trainable, at any age. I’ve written before that it is never too late to improve, and this is where that shows up most dramatically.
The strategy: stop treating exercise as an appointment
Researchers have been studying what they call “exercise snacks” — short, repeated bouts of activity scattered through the day instead of one dedicated block. No gym, no equipment, no changing clothes. The accumulated effect is real, and for people who have never been able to make a formal routine stick, it removes the biggest barrier.
Here’s what that looks like in practice:
- Take the stairs deliberately, at a pace that makes you breathe hard. Two flights, several times a day, adds up to meaningful cardiovascular work.
- Ten squats or ten push-ups against the kitchen counter before each meal. Three meals, seven days, and you’ve done something you previously did zero of.
- Walk while you’re on the phone. Most of us take more calls than we admit.
- Park at the far end of the lot. Get off the T a stop early. Small, but it’s daily and it compounds.
- Buy one adjustable kettlebell and leave it where you will trip over it. Convenience beats optimal programming every single time.
- Carry your own groceries in from the car in one trip. That’s a loaded carry, and it builds exactly the grip and core strength that predict independence later in life.
If you want a target
Two things, weekly: about 150 minutes of moderate aerobic activity — brisk enough that you can talk but not sing — and two sessions of resistance work covering the major muscle groups. That’s it. That is the whole prescription, and it has not meaningfully changed in years.
The 150 minutes does not have to be continuous, and it does not have to happen at a gym. Twenty-two minutes a day of brisk walking gets you there.
The part people underestimate
Consistency beats intensity, and it isn’t close. I would much rather see someone walk 25 minutes six days a week for a year than crush four brutal workouts in January and quit by Valentine’s Day. The first person is building something. The second is just getting sore.
Pick the smallest version you will actually do, then do it for eight weeks before you consider changing anything. If you’re not sure where to start, or you’re working around a bad knee, a bad back, or a cardiac history, that’s worth a conversation — and it’s exactly the kind of conversation we have time for here.
Dr. Mike