Repeated exposure to resistance training reduces muscle damage and inflammatory responses through adaptive mechanisms.

Study: 12‑weeks fisetin supplementation and interval resistance with aerobic training: changes in Maresin‑1 and inflammatory markers in men with obesity: a randomized controlled trial

Regular strength training, even when mixed with cardio, helps the body calm down inflammation and heal muscles better over time — just like the claim says.

Study: Eccentric exercise per se does not affect muscle damage biomarkers: early and late phase adaptations

When you first do a tough workout, your muscles get sore and inflamed, but if you keep doing the same workout, your body learns to handle it better—so you get less sore and less inflamed over time.

Study: Effects of Low-Load, High-Repetition Resistance Training on Maximum Muscle Strength and Muscle Damage in Elite Weightlifters: A Preliminary Study

Even though the study used lighter weights with more reps, it found that doing the same workout over and over made muscles less sore and damaged over time—exactly what the claim says happens with repeated training.

Study: Combined aerobic and resistance training decreases inflammation markers in healthy men

Regular weight training, even when mixed with cardio, helps lower body inflammation over time — meaning your muscles and body become less sore and stressed after workouts because they adapt.