Alison Kreideweis sat nervously on the edge of a treadmill at Finish Line Physical Therapy in New York City, on Dec. 1. She’d volunteered to help demo a new wearable device that measures an athlete’s ...

Besides sore quads and chafe marks, most new runners have one thing in common: confusion over the term “lactate threshold pace.” It pops up in training plans next to “easy effort” (self-explanatory) ...

Coaches and exercise scientists realize the important role of lactate during long-distance running—how the body produces it, how the body utilizes it as a source of energy, and how lactate contributes ...

For as long as I’ve been running – and I recently passed the four-decade mark – I’ve been practising certain key principles of our sport. Run long to develop endurance. Run fast to build speed. Take ...