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I’m 50 yrs old, 88kg, 6 feet tall and 2200 cal is my maintenance intake. I am moderately active - weights - 4 days+ per week, squash - 8 hours a week and some walking - average 12000 steps per day (6000 - 20000 depending on work etc). No cycling yet due to weather.
I am planning to drop intake on non-exercise days and increase protein all round.
Compare your stats with mine and see if your intake should be similar.
Theoretically you should be 4lb lighter, but perhaps it’s worth looking at what you are eating?
Also maybe your 3500 calorie deficit set from too high a level?
Calorie restriction has only worked for me when down to silly levels (>1200) and was very hard to keep going.