“I like to say the fountain of youth is the water cooler ... Bamman says machines are better for beginners, but free weights — barbells or dumbbells — may be more effective as you gain ...

The workout is typically done using MedX equipment, weight machines that were developed ... call it ‘the fountain of youth.’ We lose muscle and bone density as we age. It’s cumulative.

When you think of weight machines, what’s the first thing that comes to mind? For many, it’s clunky gym equipment that feels like it belongs in a beginner’s corner or a rehab clinic.