TrainingPeaks has been the training log endurance coaches reach for by default since long before "AI coaching" was a category at all, and it remains the platform most likely to show up when a triathlon, cycling, or running coach describes their workflow. That longevity has earned it real trust, and it deserves an honest look at what that trust is actually built on, alongside what has aged less well.
What TrainingPeaks is
TrainingPeaks is a training log and performance-management platform for endurance athletes and their coaches. Athletes upload activity data from more than 100 devices and apps, coaches build structured workouts and season-long plans on a shared calendar, and the platform calculates and charts load metrics, most famously TSS (Training Stress Score), CTL (Chronic Training Load, "Fitness"), ATL (Acute Training Load, "Fatigue"), and TSB (Training Stress Balance, "Form"), the Performance Management Chart that ties them together. These metrics were largely popularized by TrainingPeaks itself and have since become common vocabulary across the endurance coaching world, used well beyond the platform that coined them.
In July 2026, Garmin announced it had acquired TrainingPeaks along with strength-training platform TrainHeroic, bringing both into Garmin's fitness ecosystem. Garmin's stated intent was to expand the coaching experience it can offer around its devices; what that means in practice for TrainingPeaks' pricing, roadmap, or independence from other coaching-software providers is still unfolding, and coaches who depend on the platform should watch for how it develops rather than assume business as usual.
Who it's for
TrainingPeaks fits coaches and self-coached athletes already fluent in, or willing to learn, its specific metrics and manual workflow: cyclists and triathletes especially, given the platform's roots in power-based training, but also runners, swimmers, and hikers. It suits coaches who want to build every workout by hand with precise control over intervals, zones, and structure, and who value having the deepest, most established charting library in the category at their fingertips. It is a strong fit for a coach with an established roster of athletes who already use the platform, since switching away from years of logged history has real friction.
TrainingPeaks earns its reputation on the strength of its load-management metrics and the sheer depth of its charting. What it does not offer is any automation of the coaching decisions themselves: everything is built and reviewed by hand.
Genuine strengths
The metrics are the industry standard, for good reason. CTL, ATL, and TSB give coaches a compact way to track a season's build and taper, and the Performance Management Chart remains a genuinely useful visualization for spotting overreach or a poorly timed taper before it becomes a problem. Coaches who think in these terms will not find a more mature implementation elsewhere.
Device compatibility is excellent. TrainingPeaks syncs with the vast majority of devices and apps an endurance athlete might use, which matters enormously in a sport where athletes arrive with a mix of Garmin, Wahoo, Coros, Polar, and phone-based tracking. Premium accounts add detailed analytics across 30-plus power, heart rate, pace, and distance charts, along with elevation correction and weather-adjusted data, genuinely useful detail for coaches doing serious post-ride or post-run analysis.
The workout builder is precise. Coaches who want fine-grained control over interval structure, target zones (by power, pace, or heart rate), and how a session is presented to the athlete have a mature, well-tested tool to do it in, and Annual Training Plan features let a season be blocked out well in advance.
Coach Match adds real lead-generation value. Independent coaches building a client base get access to a directory of more than 1,500 accredited coaches and a matching service for athletes looking for one, a genuinely useful channel that many competing platforms don't offer.
Genuine limitations
The interface shows its age. TrainingPeaks' UI has a well-earned reputation, echoed consistently across independent user reviews, for being dense and not especially intuitive for new users, both athletes and coaches. Long-time users adapt to it, but the learning curve for someone new to the platform is real and often cited as the platform's biggest weakness.
Everything is manual. TrainingPeaks does not draft a workout, flag a concerning trend, or suggest a plan adjustment on its own; a coach or athlete has to notice the pattern in the PMC and act on it. For a coach managing a large roster, that means opening each athlete's file to check for problems rather than being told what changed.
Pricing adds up with a growing roster. Between the coach software fee, the one-time account activation fee, and per-athlete Premium costs (discounted at volume but not free), a coach's monthly TrainingPeaks bill scales with roster size and athlete Premium adoption in a way that is worth budgeting for carefully as a coaching business grows.
Its future under Garmin is still an open question. The acquisition is recent enough that its practical effects on pricing, feature direction, or platform independence are not yet fully visible. That is not necessarily a negative, Garmin's stated goal is to invest in the coaching experience, but it is a genuine unknown worth factoring into any long-term commitment right now.
A brief note on alternatives
If your reason for considering an alternative is specifically that TrainingPeaks requires you to notice everything yourself, checking each athlete's PMC, remembering who has an exam or a trip coming up, manually comparing planned versus executed training, that is a specific gap worth naming. Wyder for Coaches is built around an AI co-pilot that monitors a full roster and flags what changed, drafts plan adjustments the coach reviews and approves, and tracks per-athlete availability and race calendars alongside the load and recovery data. It is not a claim that AI plans replace coaching judgment, the coach makes every call either way, just a different starting point for the coach's day: proposals to react to, instead of a blank calendar and a dashboard you have to check athlete by athlete. See our full Wyder vs TrainingPeaks comparison for the details.