Half Marathon Training Plan
A half marathon training plan built around your reality
An adaptive half marathon program calibrated to your fitness level, your schedule, and your race data. Not a generic 12-week plan. Yours.
A half marathon plan that breathes with your life.
Generic plans ignore the reality of training: a stressful work week, a tight calf, a surprisingly strong long run. PRYSM accounts for all of it. After every session you log, the engine recalibrates your upcoming workouts to keep your progression optimal — without overloading you or selling you short.
How PRYSM prepares you for race day
Build your profile
Target time, race date, weekly session count. PRYSM evaluates your current aerobic base and builds a realistic plan from there.
Get your personalized plan
A structured 8 to 16-week program with paces, volumes, and intensities calibrated to your starting point — not a generic template.
Your plan adjusts as you go
Log every run and PRYSM recalibrates what's next. Progress faster than expected? The plan responds. Tough week? It backs off accordingly.
Race Projection
Your predicted half marathon time
Based on your current fitness, PRYSM estimates your race time and updates it as your training progresses.
1h42 – 1h48
Session Detail
What your half marathon sessions look like
Structured warmup, targeted work intervals, and proper cooldown — every session is built with precision.
5:30–5:45/km
4:35–4:45/km
5:45–6:00/km
What you gain with an adaptive plan
Calibrated to your level
Whether you're running your first half marathon or chasing a PR, your plan is built from your actual data — not a one-size-fits-all template.
Progressive load management
Weekly mileage increases follow safe overload principles. PRYSM never pushes you past the threshold that leads to overuse injury.
Recovery built in
Easy weeks and rest days are generated dynamically based on your fatigue trends — not fixed arbitrarily on a calendar.
Smart taper before race day
PRYSM automatically reduces volume in the final 2 to 3 weeks so you arrive at the start line fresh and ready to perform.
Half marathon training questions
What runners ask us before starting their half marathon preparation.
Between 8 and 16 weeks, depending on your current fitness. PRYSM assesses your aerobic base at setup and builds a realistic timeline to your race date.
Your half marathon starts today.
Generate your adaptive plan in minutes. Adjust as life happens. Arrive at the start line ready.
Generate my half marathon plan