Salt Swap, Leucine Myth Busted & The Hidden Power of Partial Reps

A landmark study published in The New England Journal of Medicine reveals that swapping regular table salt for a 75% sodium chloride, 25% potassium chloride substitute significantly reduces stroke, heart attacks, and death in older adults with hypertension or prior stroke. The trial tracked over 20,000 participants across rural China and found a 14% reduction in stroke, a 13% drop in major cardiovascular events, and a 12% decrease in all-cause mortality. This isn’t just about lowering blood pressure — though it did modestly reduce it — it’s about potassium’s protective role in vascular health. For the first time, we have large-scale, real-world evidence that a simple, low-cost dietary swap can prevent death. No pills. No surgery. Just a salt shaker change.

Key finding: Replacing dietary sodium chloride with a potassium-enriched salt substitute (75% NaCl, 25% KCl) reduces stroke incidence, major cardiovascular events, and all-cause mortality.

Why this matters: Most people think salt is the villain. But potassium is the unsung hero. If you’re over 60, have high blood pressure, or a history of stroke, this isn’t a suggestion — it’s a life-saving protocol. Look for brands like NoSalt or LoSalt. Avoid if you have kidney disease or take ACE inhibitors — always consult your doctor first.

If you’ve been popping 10 grams of leucine daily hoping to supercharge your gains, science just hit pause. A rigorous 12-week trial on resistance-trained young men consuming 1.8g protein per kg of body weight found zero additional benefit from leucine supplementation — whether measuring leg-press strength or muscle thickness in the vastus lateralis. The placebo group gained just as much muscle and strength as the leucine group. This isn’t a fluke — it’s confirmation that muscle protein synthesis plateaus when protein intake is already adequate. Leucine isn’t magic; it’s just one amino acid in a full-spectrum protein.

Key finding: In resistance-trained young men consuming 1.8 g protein per kg body weight daily, muscle strength and size increase significantly after 12 weeks of twice-weekly resistance training, regardless of whether they take 10 g/day of leucine or a placebo.

Bottom line: Stop wasting money. Focus on total daily protein (1.6–2.2g/kg), timing around workouts, and food quality. Whey, eggs, chicken, tofu — they already contain leucine. Supplementing it separately adds nothing if your diet is on point.

Forget the dogma that you need full range of motion (ROM) to maximize muscle growth. A new study compared lengthened-partial ROM training (e.g., bench press from mid-chest to lockout) with full ROM in trained lifters. The result? No statistical difference in muscle cross-sectional area gains in the arms or thighs after 12 weeks. Partial reps, when performed with sufficient load and volume, trigger comparable hypertrophy — especially in the stretched position. This is huge for rehab, joint pain, or time-crunched lifters.

Key finding: The effects of lengthened-partial range of motion resistance training of the limbs on arm and thigh muscle cross-sectional area are statistically equivalent to full-range training in trained individuals.

Use this: If your shoulders hurt on full bench presses, try partials from mid-chest. If you’re short on time, prioritize the lengthened portion of the movement. It’s not a compromise — it’s a strategic tool. Just ensure you’re still challenging the muscle under tension. Full ROM isn’t always necessary. Smart loading is.