I imagine that the Coronavirus lockdowns closing gyms has something to do with this, but there’s a growing movement towards bodyweight strength training (also known traditionally as calisthenics).
I ran into this recent Medium Elemental piece, which as recent others have done says that you don’t need weights to get in shape. It basically recommends you stick to basic exercises like push ups and pull ups.
And yes, in principle, you can get swole on as little as the Fundamental Few: Push ups, pull ups, squats, lunges, core exercises e.g. planks, sit ups, crunches, Russian twists, etc.
All of these exercises are safe, healthy and useful for most to do, except for push ups and pull ups. Most people do not have the needed muscular strength to minimally complete push ups or pull ups.
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