Hyrox competition and training is tough on the lower back so including regular posterior chain workouts in your routine will help prevent fatigue and avoid injuries.
Wednesday - Posterior Chain
Row 1000m Zone 2
3 x 20m Heavy Sled or 3 x 10 each leg Step ups with heavy ball
3 x 6-8 Deadlifts or DB RDLs
3 x 15 Back Ext
Bench Press or Push Ups (hand release)
Farmers Carry 3 x 20m Heavier than race weight
Calf Rasie 3 x 20
1km Ski Erg Zone 2
Happy Hyroxing
Rod