If you're already seeing results, it means your body is getting enough energy and nutrients. But here's the thing - the longer you keep training, the more your muscles will demand quality fuel. Four times a week with dumbbells is serious load, not just a warm-up.
In practice it looks something like this: at first, results come just from breaking the inactivity, muscles wake up, and regular food works fine. But then a plateau hits if you're not paying attention to protein and calories. Nothing complicated really - you don't need any special diet with chemicals and supplements. You just need to figure out if you're eating enough protein (meat, fish, eggs, cottage cheese), if you're constantly hungry, and if you have enough energy for the workout itself.
If you want your muscles to keep growing instead of stalling at the current level, it makes sense to bump up portions a bit and make sure you're getting enough protein. But that's not really a diet in the sense of restriction - it's more about being mindful with what you eat 😊