Which diet/Fast would be best for a one month fat loss while not loosing too much muscle mass?

[NordicLeonhard]

Need too loose fat in one month cause ive put on way too much during summer holiday, I will lift heavy 4 times a week and bike or train football everyday. I dont wanna loose too much muscle mass but i need to loose fat asap.

 

[NordicLeonhard]

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