I'll be honest-I used to design those "10,000 steps a day" challenges. Treadmill minutes, walking clubs, step leaderboards. It all seemed so logical. Move more, burn more, lose weight.
But after years of looking at claims data and metabolic health outcomes, I realized something uncomfortable: we were optimizing for the wrong metric.
The problem isn't that walking is bad. It's that a cardio-only focus ignores the most powerful tool for sustainable weight loss and lower healthcare costs-strength training. And our benefits systems are structurally blind to it.
Why Cardio Gets All The Attention
It's not a conspiracy. It's just easier to measure.
- Steps are simple. Heart rate is simple. Treadmill distance is simple.
- Strength training? Reps, sets, load, form-it's messy. Hard to gamify. Harder to track in a corporate app.
So the system rewards what it can count. And in doing so, it misses the bigger picture.
Cardio burns calories during the workout. Strength training builds muscle, and muscle helps keep resting metabolism, blood sugar control, and mobility from declining with age. That's the difference between a one-time sale and a long-term investment.
The Real Cost Nobody Talks About
Starting around age 30, adults lose about 3-5% of their muscle mass per decade if they don't actively resist it, and the loss speeds up after age 60. And it doesn't just mean weaker arms-it means higher claims costs.
Here's the chain reaction:
- Less muscle = lower resting metabolism = easier weight gain.
- Easier weight gain = higher rates of insulin resistance and type 2 diabetes.
- Less muscle = weaker joints = more knee and hip replacements down the road.
From an actuarial perspective, sarcopenia (muscle loss) is a slow-motion claims bomb. A 2015 American Society for Bone and Mineral Research report found that people with sarcopenia had 2.3 times the risk of a low-trauma fracture from a fall. Yet many wellness programs accelerate it by emphasizing chronic cardio without any strength component.
What Your Claims Data Is Trying to Tell You
I've seen this pattern in dozens of employer groups: an employee with 15,000 steps a day but high visceral fat, low muscle mass, and creeping insulin resistance. On the wellness platform, they look like a star. On the claims ledger, they're a growing liability.
Meanwhile, the employee who lifts three times a week might have a modest step count-but excellent blood sugar control, healthy body composition, and lower lifetime risk. The platform gives them zero credit.
That's a blind spot. And it's costing plans real money.
GLP-1 Weight Loss and the Muscle Trade-Off
If your plan covers GLP-1 drugs for weight loss, the muscle math gets more urgent. These medications produce substantial weight loss, but not all of it is fat. In recent trials, lean tissue accounted for 26-40% of total weight lost, and semaglutide studies put the share as high as 45%.
An employee who drops 30 pounds on a GLP-1 could lose 8 to 12 pounds of muscle along the way, unless they lift and eat enough protein. That stacks on top of the age-related decline above: lower resting metabolism, weaker joints, and a higher risk of falls and fractures.
Employers already pay for the medication. Paying for strength training protects the muscle the medication doesn't preserve.
How to Fix It (Without Overcomplicating Things)
You don't need to ditch your walking challenges. You just need to balance them. Here's a practical framework:
1. Reward Strength Sessions, Not Just Steps
Use apps that detect resistance training (Apple Watch's "Functional Strength Training" or dedicated apps). Give employees credit for completing two strength sessions per week-just like you do for cardio minutes. It's that simple.
2. Measure What Matters: Muscle Mass
Offer annual body composition scans (DEXA or bioimpedance). Tie incentives to maintaining or increasing lean body mass, not just losing weight. An employee who keeps their muscle is a lower-risk, lower-cost employee.
3. Pay for a Coach, Not Just a Gym
The single highest-ROI benefit I've seen is reimbursing a strength coach-virtual or in-person-for employees over 40. It costs a fraction of one knee replacement or a year of GLP-1 drugs. A good coach preserves muscle and prevents metabolic decline.
4. Track Strength Gains in High-Risk Groups
For employees with prediabetes or metabolic syndrome, link wellness credits to measurable strength improvement, like adding weight to a deadlift or squat. A 2025 meta-analysis of adults with type 2 diabetes found resistance training lowered fasting glucose and markers of insulin resistance. Hard data that predicts lower claims.
The Bottom Line
Cardio is for short-term calorie debt. Strength training is for permanent metabolic capital.
Right now, most employee benefits systems optimize for engagement metrics that feel good but miss the mark. If you want a weight loss strategy that actually reduces total cost of care, start incentivizing the barbell as much as the treadmill.
Invest in muscle. That's where the real savings are hiding.