groovester it depends on the type/intensity of exercise you are doing. A weight lifter increasing the amount they lift, is going to be packing on muscle, doing 2 Zumba classes a week probably not gonna see any muscle gains. Other types of exercise will fall somewhere in between to varying degrees.
Yes deffo planning! I've got a white board in my kitchen where I write up all lunches and dinners for the week, so I can see what's there and make sure I remove things from freezer/but x ingredient on x day, prep the next day's lunch in advance so I'm not tempted to buy lunch at work. I can change it all around as the week goes on if I need to.
Another good tip is making leftovers for the next day's lunch. It's a low effort, low cost easy way to make sure lunches are on plan.
Today so far:
B - weetabix and milk (HEXA&B), satsuma
L - roasted veg with halloumi and rice (5 syns for halloumi), banana
Dinner is going to be either pasta or noodles at a wetherspoons for either 3 or 4 syns whilst everyone else eats curry
I've got an apple and 2 snack a jacks for mid afternoon (4 syns)