Mart Seim Squats a 375kg (826 lbs) Beltless Double Five Weeks Out From Worlds

Estonian +105kg weightlifter Mart Seim is no stranger to putting up big weight, especially when it comes to the back squat. He’s a weightlifter that would give most what we’d call “squat envy” due to his explosive strength and ability to hold upwards of 400kg (880 lbs) beltless with ease.

Currently, Seim is in prep for the 2017 IWF World Championships taking place November 28th-December 5th in Anaheim, California. With about 5-weeks until Seim takes the competition floor, he’s moving closer to dialing in all of the work put in during his prep.

Yesterday, Seim shared a speedy back squat double at 375kg (826 lbs) on his Instagram page, and to top it off, it was beltless. Check out the video below.

Outside of weightlifting, this is a pretty significant set for Seim, as his back squat max is currently 400kg (880 lbs). If he was able to move 375kg for a double with that much ease, then we’d guess his true max is a little higher than what he currently has listed/attempted.

[Watch Mart Seim squat 270kg (595 lbs) for 12-reps, or perform a little squat cardio as we call it.]

As stated on his Instagram, Seim’s best clean & jerk sits at 248kg (546 lbs) and snatch at 190kg (418 lbs). Seim’s last major international competition was at the 2017 Senior European Championships where he came in fifth overall with a 180kg snatch and a 246kg clean & jerk, which earned him a 426kg total.

Seim’s weightlifting videos on his Instagram have been just about as impressive as his back squat video above. Check out one of his recent 180kg pause snatch video, which is only 10kg off his best ever snatch, and 7kg from his Rio performance.

Now the question remains, will Seim be able to top his best lifts, or the lifts he put up at the Rio Olympics when he compete’s at this year’s Worlds? He’s showing some great promise from his recent videos.

Feature image screenshot from @martseim Instagram page. 


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Jake holds a Master's in Sports Science and a Bachelor's in Exercise Science. Currently, Jake serves as one of the full time writers and editors at BarBend. He's a Certified Strength and Conditioning Specialist (CSCS) and has spoken at state conferences on the topics of writing in the fitness industry and building a brand. As of right now, Jake has published over 1,100 articles related to strength athletes and sports. Articles about powerlifting concepts, advanced strength & conditioning methods, and topics that sit atop a strong science foundation are Jake's bread-and-butter. On top of his personal writing, Jake edits and plans content for 15 writers and strength coaches who come from every strength sport.Prior to BarBend, Jake worked for two years as a strength and conditioning coach for hockey and lacrosse players, and was a writer at the Vitamin Shoppe's corporate office. Jake regularly competes in powerlifting in the 181 lb weight class, and considers himself a weightlifting shoe sneaker head. On the side of writing full time, Jake works as a part-time strength coach and works with clients through his personal business Concrete Athletics in Hoboken and New York City.