The Best Training Journal for Athletes in 2026 (Apps and Paper)

The best training journal for athletes is the one you'll actually keep using, and that depends on how you train. A runner following a coach's plan needs something different from a grappler who wants to remember what happened in sparring, or a team-sport athlete trying to figure out why some weeks feel flat.

Quick answer:

• To reflect on training and track readiness and load: Sherpa
• For an all-in-one athlete journal with coach sharing: Athlog
• For endurance athletes on a structured plan: TrainingPeaks
• For logging runs and rides with a quick effort rating: Strava
• For general journaling with athlete templates: Day One
• For runners who prefer pen and paper: the Believe Training Journal
• For BJJ and MMA: see our best BJJ apps and best MMA apps guides

Disclosure: we make Sherpa. We've tried to be fair about where other options fit better. Prices and features come from each product's App Store listing or official site and were checked on October 13, 2026. They change often.

Training journals compared

Journal	Best for	Price (Oct 2026)	Platforms
Sherpa	Intentions, reflection, readiness, and training load	Free (no paid version)	iPhone and iPad (no Android)
Athlog	Workouts, wellness metrics, media, and coach sharing in one place	Free; paid plans ($7.99/mo or $49.99/yr listed)	iPhone
TrainingPeaks	Planned workouts and performance analysis	Free Basic; Premium $19.95/mo or $134.99/yr	iOS, Android, web
Strava	Logging GPS activities with effort ratings	Free; paid subscription for more features	iOS, Android, web
Day One	General journaling with templates	Free Basic; Silver $49.99/yr; Gold $74.99/yr	iPhone, iPad, Mac, Android, web
Believe Training Journal	Paper journal for runners	Paperback book	Paper

Platforms listed are the ones we confirmed on each app’s listing. Some apps may also be available on Android.

What to look for in a training journal

Before comparing options, it helps to know what makes a training journal stick.

Structure. A blank page is hard to fill after a tough session. A simple framework (rate the session, answer a couple of questions, set a focus for next time) makes the habit easier to keep. We cover the basics in what to write in a training journal.

Numbers and words together. Ratings like effort, sleep, or soreness show you trends. A sentence or two of reflection tells you why. A training log and a training journal do different jobs, and the best tools combine them.

A history you can look back on. The value of a journal builds over weeks. If you can't easily see past entries side by side, patterns stay hidden.

Low friction. Most athletes who quit journaling started too ambitiously. Two ratings and one sentence is a good entry.

The best training journals for athletes

Sherpa (our app)

Sherpa is built around a simple loop: choose a focus before training, then do a quick reflection afterward on what went well, what needs work, and your next focus, with effort, duration, and focus ratings. Daily check-ins track sleep, recovery, and motivation. Weekly and monthly recaps connect all of it, and Sherpa looks for patterns across your reflections and training data. It tracks load across practice, lifting, cardio, and mobility, supports goals, and lets you speak entries instead of typing. It works for any sport.

Best for: athletes who want to understand how they train and recover, not just record what they did. Worth knowing: it doesn't plan workouts or sync GPS data, so endurance athletes on a structured plan may want it alongside a tool like TrainingPeaks. It's free with no paid version and no ads. It's on iPhone and iPad, with no Android app yet.

Athlog

Athlog calls itself a journal for ambitious athletes. You can track workouts, sleep, energy, soreness, mood, and custom metrics, log by voice or by hand with AI help writing entries, and attach photos, PDFs, and videos. It also lets you share data and plan sessions with a coach.

Best for: athletes who want everything in one place, including files from a coach. Worth knowing: it's newer, with few ratings on the App Store so far, and it's iPhone only.

TrainingPeaks

TrainingPeaks is the standard for many endurance athletes and coaches. It focuses on planned workouts, syncing them to your device, and analyzing performance afterward, with comments on each workout that a coach can see. A free Basic account works with a coach. Premium adds more analysis and planning tools, including the Annual Training Plan.

Best for: runners, cyclists, and triathletes following a structured plan, especially with a coach. Worth knowing: it's built around workout data more than written reflection or how you feel day to day.

Strava

Strava is a GPS activity log with a large social community. When you save an activity, you can add a description and rate perceived exertion on a 1 to 10 scale.

Best for: runners and cyclists who already use it and want a quick effort rating alongside their data. Worth knowing: it's built for logging and sharing activities. Reflection is limited to the activity description, and non-GPS sessions like skill work or sparring are harder to capture well.

Day One

Day One is a general journaling app with templates, daily prompts, and photo entries. The free Basic plan works on one device with one photo per entry. Silver adds sync across devices and integrations, including Strava. Gold adds AI prompts and summaries.

Best for: athletes who want one journal for training and life, with the freedom to design their own template. Worth knowing: you'll build the structure yourself, since it doesn't track ratings, readiness, or training load.

Believe Training Journal (paper)

Written by professional runners Lauren Fleshman and Roisin McGettigan-Dumas, the Believe Training Journal is a paperback running log. The 10th anniversary revised edition (2025) has a year of undated weekly pages, grids for workout details, space to reflect and plan, worksheets, and advice from the authors throughout.

Best for: runners who think better on paper and want structure plus encouragement. Worth knowing: it's running-focused, and like any paper journal, spotting trends means flipping back through pages yourself. We compare the tradeoffs in training journal app vs notebook.

Which training journal should you use?

• You have a coach writing your plan: use whatever your coach uses (often TrainingPeaks), and add a reflection habit if it's missing.
• You train a skill sport like BJJ, MMA, tennis, or soccer: look for something that captures how sessions felt and what you learned, not just distance and time.
• You keep starting journals and stopping: choose the option with the fewest steps, and keep entries to two ratings and a sentence.
• You want to know why some weeks feel great and others don't: track sleep, soreness, or motivation alongside training, so you can see how they connect.
• You love writing by hand: go paper, and review it once a month.

Try Sherpa as your training journal

Any of these, even a basic notebook, beats relying on memory. If you want a free training journal that asks for a focus before practice, takes about a minute to reflect afterward, and connects your readiness and training load over time, download Sherpa on the App StoreSherpa is coming to AndroidSherpa is coming to Android.