Lurich won the World Greco-Roman Wrestling Championship in 1912 and was the last man to face Frank Gotch before Gotch retired in 1913. As far as strength feats, among others, Lurich is credited with a one-arm jerk of 267 lbs., and a two-arm clean & jerk of 344 lbs — both of which would still be impressive today.
In 1925, Cadine performed a one-arm swing with 90 kilos which was actually greater than his own bodyweight. Cadine could also right hand snatch 211 pounds and one-hand deadlifted the famous Apollon Wheels.
Also of note is the sand-pit floor — you’ll see this feature a lot in old school physical culture gyms as it made it so globe barbells and dumbbells were not damaged if they were ever dropped.