Train for Boston, or your spring marathon, and actually make it to the start line healthy.

Injury prevention is only half of what makes Boston+ different. The other half is how the training itself is built.

Most marathon plans are almost entirely steady mileage: long runs, easy runs, more long runs. Boston+ layers in small, deliberate doses of faster running throughout the program, short sprint work, hill repeats, quicker efforts mixed into an otherwise mileage-based plan. It's not there to replace your long runs. It's there because varying the intensity, and how your legs load and absorb impact, is one of the tools we use to build durability against the overuse injuries that come from mileage alone.

The other piece is threshold training: running at your lactate threshold, the effort where your body is right on the edge of keeping up with the metabolic byproducts of hard running. In plain terms, it's the hardest pace you can hold for a sustained stretch before your legs shut down. We build threshold work into every phase of the program, and lean on it hardest in the weeks that set up your marathon-specific training, the race-pace long runs that come later in the cycle. None of this is secret. Elite coaches have leaned on threshold work for years, and the running world has paid a lot more attention to it over the last two decades than it used to. What's different is that most age-group marathon plans don't build it in this deliberately. Boston+ does.