Strength training is not only more beneficial for general fitness than most people realize, it isn’t even necessary to spend hours at the gym every week to get those benefits. Almost any amount of it is much better than nothing. While more effort will produce better results, the returns diminish rapidly. Just one or two half hour sessions per week can get most of the results that you’d get from two to three times that much of an investment (and that’s a deliberately conservative estimate). This is broadly true of any form of exercise, but especially so with strength training. In a world where virtually everything in health and fitness is controversial, this is actually fairly settled science.
See also: https://www.painscience.com/articles/strength-training-frequency.php.
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