What is the single best predictor of longevity from exercise?

VO₂ max. People in the top 25% of cardio fitness for their age have a fraction of the mortality risk of the bottom 25%.

Should older adults still lift weights?

Yes — resistance training is the single most effective way to preserve muscle mass, bone density, and independence with age.

Grip is a strong proxy for whole-body strength and predicts mortality independent of other factors. Train it directly.

strength · bodyweight / dumbbells

Knee-friendlier lunge that trains balance and single-leg strength.

3 × 10 per leg 10 minrest 60s

Log your sets with a rest timer and one-tap save.

Equipment

bodyweight, dumbbells

Rest

60s between sets

Primary muscles

glutes, quads

Also works

hamstrings, balance

Stand tall, feet hip-width.
Step your right foot back into a long lunge, lowering your right knee toward the floor.
Drive through the front (left) heel to stand back up.
Repeat, alternating sides.