I've tested countless diet trends (keto, carnivore, intermittent fasting, carb backloading, dry fasting, and high-protein among many others) while chasing greater strength. Ironically, the biggest improvement came from reintroducing food groups, not cutting them out. When I added fruit back into my diet, especially berries, my training improved almost overnight.
It started by accident. While traveling, fruit became a staple simply because it was what I had access to. I noticed my energy in the gym climbed, recovery between sessions improved, sleep deepened, and soreness dropped to a low enough level that I could train more frequently. When I returned home and continued eating fruit daily, the benefits continued.
The explanation makes sense. Fruit provides fast-acting carbohydrates to fuel strength training, but it also delivers antioxidants, micronutrients, and polyphenols. It helps refill depleted muscle carbohydrate stores (glycogen) while helping shield against the mechanisms that interfere with training consistency (increased oxidative stress and inflammation).
For me, the shift meant heavier lifts, shorter recovery windows, and an overall ability to push harder in the gym without burning out. Plus, berries (especially blueberries) have fantastic benefits for the brain, gut, and immune system.