I've been lifting for around 2 years now and have built a good muscular base and look good with and without clothes. However, recently I decided to join Muay Thai and the workouts are intense so I decided to give lifting a break for a while.

We do a lot of bodyweight pushups, burpees, bw squats etc but no actual lifting weights.

I know to gain or maintain muscle you need to lift but how bad would the muscle loss be if I stop lifting for say 2 months but do muay thai and bodyweight exercises?

Also this is the first time my shoulders are now looking rounded and cut up in a good way due to fat loss and my abs are becoming visible which I like.