Sub 1:40 Half Marathon Pace Chart & Training Guide

Training for a Sub 1:40 Half Marathon

Running a Half Marathon in under 1:40 requires a pace of 4:44 per kilometer (7:38 per mile). This is a realistic goal for experienced runners who commit to a structured training plan over 8-16 weeks. Your weekly mileage should be in the 55-75 km range, with three quality sessions per week: one interval workout, one tempo run, and one long run. The key interval session is 3×3km @ 4:40/km with 90-second recovery jogs. Your tempo runs should be 35 min @ 4:50/km, building the lactate threshold endurance you need to hold race pace when fatigue sets in. Long runs should be 25-30% of your weekly volume, run at a comfortable pace 60-90 seconds slower than your target race pace. Consistency matters more than any single workout. Missing one session is fine, but missing a full week sets your aerobic base back by roughly two weeks. If you are coming off a break, add no more than 10% weekly mileage per week to avoid injury. For advanced runners, the key breakthrough comes from threshold training. Your lactate threshold pace is roughly 15-20 seconds per km faster than your target race pace. Progression long runs, where the final 3-5 km are at marathon pace, teach your body to run fast on tired legs. Strength training twice per week (squats, lunges, single-leg deadlifts) reduces injury risk by 50% and improves running economy by 2-4%. Track your resting heart rate each morning. A spike of 5+ bpm suggests incomplete recovery, and you should swap the day's quality session for an easy run. Sub-1:40 half marathon requires holding 4:44/km, a pace that demands respect for the distance. The most common training error is running long runs too fast. Your 16-18 km long runs should be at 5:15-5:30/km, not near race pace. The purpose of the long run is time on feet and capillary development, not race simulation. Save race pace for tempo runs, which should be 8-10 km at 4:40-4:45/km once per week.