Dr Pete Sulak writes:
A new study dropped last week that I want to put in front of you.
Harvard’s School of Public Health followed 147,000 adults for thirty years, tracking exactly how much strength training they did each week and how long they lived. The paper was just published in the British Journal of Sports Medicine. Cleanest data we’ve had on this question.
The headline: 90 to 120 minutes of strength training per week is the longevity sweet spot.
Not five hours. Not daily heavy lifting. 90 to 120 minutes. Roughly two 45-minute sessions, or three 30-minute sessions a week.
At that range, the data showed:
13% lower all-cause mortality
19% lower cardiovascular death
27% lower death from neurological disease (Alzheimer’s, Parkinson’s, ALS)
Here’s what surprised me. More didn’t help. Past 120 minutes a week, the curve flattened. People doing five and ten hours of resistance training a week got no additional longevity benefit over people doing two.
That’s a different message than most of us absorbed from the fitness industry.
Here’s why it matters for the audience reading this. Lean muscle mass is one of the strongest predictors of long-term outcomes in nearly every chronic disease category, cancer included. Sarcopenia (the muscle loss that accelerates with age) is one of the most overlooked drivers of decline, and one of the hardest things to reverse once it sets in.
This study put a specific, doable number on what it takes to protect against that. Two hours a week. Two or three sessions. Loading your muscles against resistance.
Bodyweight counts. Resistance bands count. Filled water bottles count. Two-pound cans of soup count. The thing that matters is the resistance, not what’s supplying it.
If you’ve been telling yourself you’d start when you have time, the floor turned out to be lower than most of us thought.
I’ll be praying for you today.
Standing with you,
Dr. Pete