Do you get stronger with training?

Today I went to the grocery store to buy vegetables with my dad and I helped him carry them back to the car and the groceries were so heavy that I was worried I would injure my muscles and I had a neighbour who used to walk over 5 kilometres to a grocery store much further away every single week or day to buy vegetables for her adult children and her children's children. I do not know how a 70 year old woman could be stronger than me. I'm not sure if it lengthened her life cause she did pass away years ago and I think she was at an average age when she passed, so even though she had enormous muscle power, ate a lot of good food, and had a good family, she did not live any longer than the average person in our town.

Do you get stronger with training?
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