Training — Kindle Category Opportunity
Competition snapshot for the Sports & Outdoors best-seller list, ease-of-entry score 50.5/100.
Category metrics
Score
50.5
Median reviews
437
Weak share (top 20)
35%
Median price
$8.98
Median star rating
4.6
Books scanned
50
Worth writing in?
Training plans, workout logs, and season-planning journals for amateur athletes are structured, repeat-purchase consumables that don't require coaching credentials. The category holds full prices while keeping an unusually enterable front row.
Editor's note.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 5 | Every Step Stronger: Your Foundation for Winning at Life | 5.0 | 5 | $2.99 |
| 15 | Lift to Live: Evidence-Based Strength Training Protocol for Longevity-Minded People Who Want to Build Muscle and Stay Functional for Life | 4.6 | 53 | $4.99 |
| 4 | Sandbag Berserker: A Manual of Power-Endurance (The Sandbag Trilogy Book 3) | 5.0 | 88 | $2.99 |
High-frequency phrases in this category's titles
Mine all categoriesHigh-frequency phrases mined from the 50 best-seller titles on this category's list. The ease-of-entry score tells you how winnable the category is; these title phrases tell you which words readers search with — use the two layers together. Frequency is a title statistic, not a search-volume estimate.
| Phrase | Titles | Rank-weighted score |
|---|---|---|
| leaner stronger | 5 | 163 |
| strength training | 6 | 132 |
| build muscle | 5 | 105 |
| building the ultimate | 2 | 97 |
| leaner stronger the simple | 2 | 97 |
| simple science of building | 2 | 97 |
| stronger the simple science | 2 | 97 |
| bigger leaner stronger | 3 | 94 |
| thinner leaner stronger | 2 | 69 |
| leaner stronger workout journal | 2 | 59 |
| year one challenge | 2 | 59 |
| science of strength | 2 | 56 |
Sign in and click any phrase to send it straight to the keyword competition lookup.
More Sports & Outdoors categories
Check the keywords before you write
Category scores show where entry is easiest; keyword lookups show whether readers actually reach for it. A free account includes keyword competition lookups plus unlimited category scans.
After you publish: why aren't readers buying?
Category research picks the direction; review diagnosis reads the readers. The same platform clusters a book's critical reviews into severity-ranked root causes, each anchored to verbatim quotes — see it applied to a full narrative-history title.
Keep researching with the free tools
Research snapshot scanned on Oct 19, 2026. Refreshed periodically — not live tracking.