5K training plan with strength: 8 weeks, 3 runs and 2 lifting days

The runs grow, not the weights. Each phase's runs are written as its first week, and Coachh adds about 10% a week from there: the 35-minute long run becomes 39 and then 42 minutes in weeks 2 and 3, and the interval session adds a repeat. Week 4, the last week of the base, drops to about 70% of the week before. Week 7 is lighter too, so the race week starts from fresh legs, and the race week itself is short.

Strength stays small on purpose. In the base phase each exercise adds a rep a week at the same weight; once every set reaches the top of the range, it goes up one step (5 lb on dumbbells, 10 lb on squats and deadlifts). From week 5 the main lifts drop to sets of 5 with three reps in reserve: heavy enough to make your legs stronger, nowhere near heavy enough to leave them sore for Tuesday's intervals.

Strides aren't sprints. Twenty seconds of quick, relaxed running, building to about mile-race speed and easing off, with a full walk back. They teach your legs to run fast without the cost of a hard session.

After a rough night, Tuesday's intervals become an easy run of about the same length, with the reason on the plan. That's not losing a session: one missed interval workout costs you nothing in an 8-week plan, while a hard session on no sleep can cost you the next three days.

On a strength day after a bad night, the main lift gets lighter, accessories lose a set and no weight goes up. If your calves or shins are sore from the strides or the intervals, say so: Coachh goes easy on that area for the day, and calf raises come off that session.

Pain is different from soreness. Shin pain that's sharp, a spot that hurts to press, or anything that changes how you run is a reason to stop and see a doctor or physical therapist, not to run through it. Missed a run? Coachh picks it up the next day, one only. Runs from your Apple Watch or Strava count toward the planned run through Apple Health.

A rough night after time off counts once: Coachh takes the more cautious of the two changes, never both.

Why lift at all if the goal is a 5K?

Because strength training is one of the few things that reliably helps distance runners. A systematic review of 24 studies found that adding strength training usually improved running economy by 2% to 8% and tended to improve time-trial performance over 1.5 to 10 km, without hurting body composition (Blagrove and colleagues, 2018). The authors suggest two to three sessions a week. And in a meta-analysis of 25 trials, strength training cut sports injuries to less than a third, while stretching made no difference (Lauersen and colleagues, 2014).

Why are most runs easy?

Because easy running is where the fitness comes from without the wear. Endurance athletes do about 80% of their sessions at low intensity and about 20% hard (Seiler, 2010). Coachh keeps hard running to a quarter of the week's running minutes or less and plans one quality run with two or three runs. Easy means you can talk in full sentences: the CDC's talk test is the simplest check (CDC).

Why only about 10% more each week?

Because big jumps are where injuries cluster. In a year-long study of 874 new runners, those who increased their weekly distance by more than 30% over two weeks had more distance-related injuries than those who stayed under 10%, though the result fell just short of statistical significance (Nielsen and colleagues, 2014). At about 10% a week, with two lighter weeks, this plan goes from 85 minutes of running in week 1 to about 120 at its peak in week 6, which is plenty for a 5K.

After the race, take an easy week. Then either repeat the build for a faster 5K, move to a 10K (tell Coachh the race and date and it builds a base, build and race phases around it), or switch to the hybrid plan if you'd like more lifting and less racing.