Sub 1:50 Half Marathon Pace Chart & Training Guide

Training for a Sub 1:50 Half Marathon

Running a Half Marathon in under 1:50 requires a pace of 5:13 per kilometer (8:23 per mile). This is a realistic goal for recreational runners who commit to a structured training plan over 8-16 weeks. Your weekly mileage should be in the 40-55 km range, with three quality sessions per week: one interval workout, one tempo run, and one long run. The key interval session is 3×2km @ 5:10/km with 90-second recovery jogs. Your tempo runs should be 25 min @ 5:20/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. As an intermediate runner, consistency is your biggest performance lever. Running 4-5 days per week with modest volume beats running 3 days with higher intensity. Your body needs the repeated aerobic stimulus to build capillary density and mitochondrial function. Do not skip easy days. Easy running at 65-75% of max heart rate builds your aerobic engine without the recovery cost of hard sessions. If you are injury-prone, replace one run per week with swimming or cycling. Cross-training maintains fitness while giving your joints a break. Foam rolling and dynamic stretching before runs reduces injury risk significantly. Sub-1:50 half marathon at 5:13/km is where many runners discover the joy of distance racing. At this pace, you are fast enough to feel like a real racer but not so fast that every run is painful. The secret weapon at this level is the mid-week medium-long run of 12-13 km at easy pace. This bridges the gap between your short daily runs and your weekend long run, building the aerobic volume that makes 21 km feel like an extension of your fitness rather than a reach beyond it.