lactate threshold

Lactate level and lactate threshold are hot topics in the fitness world. Researchers recently examined different sets of cleans - 3, 6, or 9 reps - to see how it changed lactate levels.
My wife is worried that exercise - especially training with weights - will interfere with breastfeeding. Will exercise decrease her milk supply?
Is the age old "talk test" actually a good measure of heart rate and exertion? A new study reveals the answer.