The news desk
On October 1, 2026, Runners Connect Science Training published an article discussing how steep a hill should be for hill sprints. The article states that the appropriate slope for hill sprints is 6% to 8%, and after 2 to 3 months of training you can progress to 10%; it also explains what slope percentage means, with a 10% slope equivalent to 5.7 degrees and 10 meters of climb per 100 meters. The article provides a progression table: from 2 sets of 8 seconds each time, 2 times per week, gradually increasing to 10 sets. The article also states that during hill sprints, landing impact is smaller and hamstring load is lower, but the burden on the calves and Achilles tendon increases, and it recommends completing them at about 95% of maximum effort with full recovery.
Hill sprints work best on a 6% to 8% grade, and you can move to 10% after 2 to 3 months. A 10% grade is a 5.7-degree slope, or 10 meters of climb per 100 meters. Uphill sprinting lowers landing impact and hamstring load but adds calf and Achilles work, so run at about 95% effort and recover fully.