For the dedicated athlete

Train with
purpose

Free personalized training plans and performance calculators built for runners, cyclists, and triathletes.

Free guide

Get the Ultimate Zone 2 Training Guide β€” free.

The complete protocol β€” heart-rate ranges, sample workouts for run, bike, and Hyrox, and the discipline elites use. Delivered to your inbox.

Plus weekly intel for runners, cyclists, triathletes, Hyrox athletes. Unsubscribe in one click.

The Companion Book

The heart-rate zones, field tests and base plans behind the calculators on this site, in one book.

Zone 2 Training for Runners and Cyclists by Drew Calloway, book cover
The companion book Zone 2 Training for Runners and Cyclists by Drew Calloway

Find your heart rate zones, build an aerobic base with 8- and 12-week plans, and use pace and power tables to train easy and race faster. Inside: zone tables by age, max HR, heart rate reserve (Karvonen) and LTHR, field tests for max HR, LTHR and FTP, four ways to verify Zone 2 without trusting your watch, and complete base plans for running and for cycling.

Top Picks for Training Season

The four pieces of gear our calculators reference most: a watch that tracks every zone, a trainer for structured workouts, the chest strap that makes heart-rate math accurate, and a race-day shoe.

As an Amazon Associate we earn from qualifying purchases. Prices are approximate and change often.

Training Plans

Science-backed periodized programs based on Jack Daniels, Joe Friel, and 80/20 methodology. Export directly to your calendar.

Find Your Gear

Answer a few quick questions and get personalized equipment recommendations matched to your goals and budget.

πŸ›’

Ready-to-Shop Setups

Skip the research rabbit hole. Four complete kits with real products and prices: Beginner Runner, Triathlon Race Day, Bike Commuter, and Hyrox Training.

Shop the Kits
🎁

Holiday Gift Guides

Gifts for runners, cyclists and triathletes, ordered from the big gift down to stocking stuffers, plus a gift finder that matches the gift to their training level.

See the Gift Guides

Performance Calculators

25+ free tools to optimize every aspect of your training

🎽 VO2 Max & Fitness

Group of runners training on a track

Why athletes choose us

Science meets
simplicity

Every calculator is built on peer-reviewed research and validated methodologies. No accounts required, no hidden feesβ€”just accurate tools for serious athletes.

Common Questions

Are these training plans really free?

Yes. Generating plans and calendar (.ics) export are free for everyone, with no signup. PDF, Excel/CSV, saved plans and share links are part of Premium, a $12 one-time unlock.

What training methods are used?

Our plans incorporate principles from Jack Daniels, Joe Friel, 80/20 Endurance, and proven ultramarathon coaching methodologies.

Can I customize the training plans?

You can set your experience level, weekly availability, race date, and preferred long workout day. Export to spreadsheet for full customization.

How accurate are the calculators?

All calculators use peer-reviewed formulas and established sports science. We cite sources and explain methodology for full transparency.