You are training more than you ever have, because adolescence made you. Now the vet nurse has raised an eyebrow at the scales. This is arithmetic, and it does not mean training less.
Treats are food, not extras
Everything your dog eats in a day is that day's food, including 40 pieces of cheese handed out on a walk. Nothing about training makes it stop counting. Reward-based methods are what the veterinary behaviour guidance recommends, so the answer is never to stop paying your dog. The answer is where the payment comes from.
Do this today
Measure the day's whole ration into 1 container in the morning, and take the training food out of that container.
Use ordinary kibble, or a portion of the wet food, for the easy repetitions at home.
Save the high-value food for the hard places, and cut the meal by roughly what you handed out.
Make the pieces smaller. A piece the size of a pea pays as well as a thumb-sized one, and you get 4 times the repetitions.
Count the extras for 1 day and write them down. Chews, the corner of your toast and dropped biscuits all belong on that list.
Split 1 meal across 3 short sessions. That costs nothing, and most Sessions can be paid entirely from the bowl.
What to check, and who to ask
Your dog is somewhere between 6 and 24 months old and still changing shape. What looked right at 7 months old may not be right at 14 months old. Ask your veterinary practice to score your dog's body condition and to show you how to feel for it yourself. Then weigh your dog monthly on the same scales and keep the numbers, because a trend across 3 months tells you more than 1 reading.
Do not solve it with exercise. Adding a long run tends to raise arousal rather than lower it, and your dog is still growing. Ask your veterinarian before any forced repetitive exercise for a growing dog, including running or cycling alongside you. Free sniffing walks are a different thing.
Safety note
Book a veterinary examination for limping, stiffness, a change in gait, or a sudden change in weight or appetite in either direction. Pain frequently presents as a change in behaviour rather than as obvious lameness, and sudden behaviour change warrants an examination. Weight you did not plan to lose or gain is a veterinary question, not a training one.
Today's version, in one line: measure the whole day's food into 1 container tonight, and train out of that.