Tryndamere vs Garen Top Matchup
Tryndamere Top wins 52.4% of 3,786 Low Elo games against Garen Top, +2.9 points vs expected, 2-patch window 26.19-26.20.
Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.
Why Tryndamere is favored
Tryndamere can sustain through short trades and control when to extend them, while Undying Rage(R) prevents Garen from finishing him with Demacian Justice(R) during its duration. Spinning Slash(E) also lets Tryndamere stay on Garen or leave as the invulnerability ends, so Garen has to manage the ultimate window carefully.
How to play as Tryndamere
Keep Undying Rage(R) for the point when Garen commits to his burst, then use Spinning Slash(E) to leave as the invulnerability expires rather than giving him a late Demacian Justice(R).
Undying Rage(R) makes Tryndamere unable to die for several seconds, so Demacian Justice(R) cannot finish him during that window.
Bloodlust(Q) gives Tryndamere a way to heal after a short trade, while Spinning Slash(E) lets him choose whether to continue chasing Garen or disengage.
How to play as Garen
Save Demacian Justice(R) until Undying Rage(R) ends, and use Decisive Strike(Q) to create distance while Tryndamere burns through the invulnerability.
Sources
These notes come from r/GarenMains, checked against the champions' abilities.