The best summer training for high school cross country is mostly easy running, built up slowly from what the runner already does, with at least one rest day a week, plenty of sleep, and enough food to fuel it. Summer is for building a base that arrives healthy at the first practice, not for racing workouts. Once the season starts, the team coach sets the training, and the summer plan should hand over to it.
This guide is part of our running training plans by event series. Parents may also want our guide to AI running coaches for high school parents.
What should summer training look like?
Summer has one main job: get the runner to the first day of practice fitter, injury-free and still enjoying it. That means:
- Mostly easy running. Easy means the runner can talk in full sentences the whole way. Easy days build the aerobic engine that cross country depends on.
- Short strides two or three times a week: 4 to 6 relaxed accelerations of about 15 to 20 seconds, walking back. They keep the legs quick without hard workouts.
- One longer easy run a week, modestly longer than the others, not a race.
- Simple strength: bodyweight squats, lunges, calf raises, planks and hip work, two short sessions a week.
- Other sports and play are a plus. An international youth athletic development consensus recommends broad, varied activity and warns against early, intense specialization in one sport.
Hard intervals and time trials are not needed in summer. If the team coach shares a summer plan, follow that plan first.
How much should mileage go up?
Start from what the runner is doing now, not from what a teammate or a top state runner does.
- First 2 weeks: repeat the current week, or start with 20 to 30 minutes of easy running 4 or 5 days a week if the runner has been off.
- Then: add a little at a time, usually a few minutes to a couple of days, and hold each new level for a week or two before adding more.
- Every third or fourth week: step back for an easier week.
- Add to easy days first. Keep the longer run at about the same length while the rest of the week grows.
There is no target number that every runner must reach. A freshman coming from soccer and a senior with three seasons of running need very different summers. See how many miles a week to run and the 10 percent rule.
Why do rest days and sleep matter so much?
Teenagers are still growing, and fitness comes from recovery after training, not from the training itself. Plan at least one full rest day every week.
Sleep is the biggest recovery tool. A consensus statement on sleep for young people recommends 8 to 10 hours a night for teens aged 13 to 18. In a study of middle and high school athletes, those who slept less than 8 hours a night were 1.7 times more likely to have had an injury than those who slept 8 hours or more. That study shows an association, not proof of cause, but it points the same way as everything else: protect sleep, especially when summer runs start early or school restarts.
How should a high school runner eat?
Eat enough, regularly, every day. Runners in training need more food, not less.
- Three meals plus snacks, with carbohydrate (rice, pasta, bread, potatoes, fruit), protein and fruit and vegetables.
- A snack before morning runs if dinner was early, and a meal or snack with carbohydrate and protein after training.
- Water through the day, and drink to thirst on runs. In summer heat, run early or late and slow the pace.
Never cut food or try to lose weight to run faster. An international consensus statement on relative energy deficiency in sport describes how eating too little for the training load can harm bone health, hormones, growth, mood and performance. Warning signs include constant tiredness, frequent illness, stress injuries, and, in girls, missed or stopped periods. If a parent notices any of these, talk to the family doctor.
What should happen when something hurts?
Pain goes to a parent and a doctor. Muscle tiredness after a run is normal; pain that gets worse during a run, causes limping, or is still there the next morning is not. Stop running on it, tell a parent, and see a doctor or physiotherapist before running again. Do not run through pain to keep up with a plan.
How does summer hand over to the season?
When official practice starts, the team coach is in charge of training. The coach knows the team schedule, the meet calendar and how each runner is responding. A summer plan should end in a way that fits what the coach plans next, and runners should share their summer training log with the coach.
During the season, the jobs at home stay the same: sleep, eat enough, keep easy days easy, and flag pain early.
How should a runner race at state?
Start controlled. In an analysis of nearly 4,000 performances at a state championship cross country 5K, runners on average slowed by about 9 percent from the first mile to the second. Going out too fast is common. A steady first mile leaves energy to pass runners in the second half.
How your HealthAI coach applies this
For runners 13 to 17, HealthAI requires a parent or guardian's consent at signup. Your coach writes a 2-week plan of easy running built from what the runner already logs in the health portal, and adjusts it from check-ins on sleep, soreness and energy. For runners under 18 the coach never discusses weight loss or restricting food, and it refers any pain to a parent and a doctor. In season, the team coach's training comes first. Plans start at $30 a month; see plans.
Your coach builds this around your training data. Start at HealthAI.coach.
Sources
- Bergeron MF et al., International Olympic Committee consensus statement on youth athletic development. British Journal of Sports Medicine, 2015. doi:10.1136/bjsports-2015-094962
- Paruthi S et al., Recommended Amount of Sleep for Pediatric Populations: A Consensus Statement of the American Academy of Sleep Medicine. Journal of Clinical Sleep Medicine, 2016. doi:10.5664/jcsm.5866
- Milewski MD et al., Chronic lack of sleep is associated with increased sports injuries in adolescent athletes. Journal of Pediatric Orthopedics, 2014. doi:10.1097/BPO.0000000000000151
- Mountjoy M et al., IOC consensus statement on relative energy deficiency in sport (RED-S): 2018 update. British Journal of Sports Medicine, 2018. doi:10.1136/bjsports-2018-099193
- Deaner RO et al., Males and Females Pace Differently in High School Cross-Country Races. Journal of Strength and Conditioning Research, 2016. doi:10.1519/JSC.0000000000001407