First of all, if you want to show figures, even if you train effectively and have adequate nutrition, your arm circumference will not grow to 1cm, so even if there is a change, it is hard to see (otherwise, it will increase to 1cm in one month and 12cm in one year. Can you believe it? )

Secondly, regardless of whether the nutrition is sufficient or not, your training is obviously not in place, indicating that the warm-up is in place and the standard of training is muscle exhaustion. This is far from it (suppose you bend with 15kg dumbbell at most 8 times, and it will be basically in place when you can't finish with 5kg dumbbell standard 10 times). Novices are not very resilient. After you run out of 1 time, it is impossible to continue a day's rest.