Our bodies undergo many changes that can be reversed with proper strength training. Wearing glasses, dying one’s hair, or applying creams for age marks have their place, but nothing compares to the long list of benefits from high intensity interval training for strength:
1. Base Metabolic Rate (metabolism) decreases. Those who are stronger can have the metabolism they had when they were twenty years younger. More muscle requires more calories.
From this Science Daily Muscular Heart Failure Patients May Have a Better Chance at Survival, Study Suggests:
“University of Alberta research has discovered heart failure patients with more muscle have the potential to increase their length of life.”
I would also suggest that even those who did not experience heart failure and have more muscle will have greater potential to increase their length of life. As this blog is fond of saying people are not generally put in nursing homes for
From this study Resistance Exercise Reverses Aging in Human Skeletal Muscle:
"Healthy older adults show evidence of mitochondrial impairment and muscle weakness, but that this can be partially reversed at the phenotypic level, and substantially reversed at the transcriptome level, following six months of resistance exercise training.”
Many years ago I attended a conference hosted by Arthur Jones, the inventor and owner of Nautilus exercise equipment. He put forth the idea that older women with osteoporosis broke their hips before they hit the 
ground. He said that their bones were so porous that their hip bones gave way first and then they fell.
