At 38 years old and 175 lbs, your focus for a recomp shouldn't just be the total milligrams of androgens, but how you manage your insulin sensitivity and prolactin levels while on Trenbolone.
Trenbolone is unique because of its incredible ability to increase nitrogen retention and its binding affinity for the glucocorticoid receptor, which literally prevents muscle catabolism even in a caloric deficit. However, jumping straight into 300mg+ a week can be a shock to the system if your cardio and blood pressure aren't dialed in.
The Dosage Strategy: 50mg-75mg Every Other Day (EOD) of Tren Acetate is a much smarter starting point than a fixed 300mg/week pack. This allows you to monitor the 'Tren-somnia' and night sweats. If the side effects become unmanageable, the Acetate ester clears your system in 48-72 hours.
The Masteron Synergy: Stacking it with Masteron (200-300mg/week) is an excellent choice for a recomp. Masteron doesn't just add 'hardness'; it acts as a mild anti-estrogen and, more importantly, it can help mitigate some of the neurological 'mood' side effects that Trenbolone is famous for by balancing the androgen-to-progestin ratio.
Nutrient Partitioning: To truly 'recomp,' you need to capitalize on Tren’s ability to shuttle nutrients into muscle cells. Keep your carbohydrate intake focused around your training window. Because Trenbolone can negatively impact thyroid output (T3), some users find that adding a very low dose of T3 (12.5mcg-25mcg) keeps their metabolism from stalling during the later weeks of the recomp.
Prolactin and Health: Don't forget that Tren is a 19-nor. Even at moderate doses, it can spike Prolactin. Keep P5P (Vitamin B6) at 100mg-200mg daily to keep Prolactin in check, and monitor your blood pressure regularly.
Recomping is a marathon, not a sprint. Quality over quantity.