I ran through the research on optimal Strength Training (ST) for longevity recently. Some of the findings that surprised me:
- Muscle mass not relevant for longevity -- strength is what matters
- Strength can be built with just 1 workout/week
- For muscle mass, workout 2-3 times/week
- Optimal total workout time for longevity is 20-59 minutes/week. Doing more ST than this reduces the benefit. At more than 2 hours/week of total time, longevity is worse than if you had never lifted a weight.
More details on my blog: Full Power of Strength Training