Evan Seinfeld has built a fitness business aimed directly at metal audiences, and the Biohazard bassist and vocalist says the reason comes down to what he sees when he looks out from the stage.
Speaking on the September 16 episode of SiriusXM‘s “Trunk Nation With Eddie Trunk“, Seinfeld discussed Full Metal Fitness, the app he recently launched, and explained what prompted it.
“All my fans, the guys like you and me who grew up listening to [Judas] Priest and [Iron] Maiden and [Black] Sabbath and Metallica, are all our age. They’re in their 40s, 50s, 60s. And I gotta be honest and call it how I see it. It seems like 90% of the fans of metal are out of shape, overweight, eating toxic food, not exercising, not working out. And [I’m] not like saying it in a judgmental way. I’m here to inspire, and I’m here to help,” he said (as transcribed by Blabbermouth).
Seinfeld presented the figure as his own read on the audiences he plays to rather than as a statistic drawn from any study.
“I really got into helping people. This is like my new thing that gets me excited,” he added.
The programme is split into two parts. One is a free guided workout that requires almost no equipment. The other is a paid coaching membership built around a meal plan, a tailored training programme, group video calls and accountability partners.
“A free at-home workout that you can do. All you need is a pair of five- or 10-pound dumbbells and a yoga mat or just a soft floor,” he explained. “And it’s completely guided. I don’t know if you remember P90X or Insanity, but this is modules of one minute at a time of pushups to Pantera, squats to Iron Maiden, curls to Metallica. And there’s rest modules. It’s something that really inspires me, bringing people together, building community,” he explained.
He went on to describe running a session at a festival in front of a small crowd, and to set out how the paid side of the business works.
“At the last festival that Biohazard played, there was 100,000 people at Bloodstock [Open Air], probably the coolest U.K. festival, period,” he continued. “And they’re so true to metal, and they even let me DJ the after-party, and I held a full metal workout right in the middle of the festival. There was, like, 35 people there, jumping up and down, doing lunges and listening to Thin Lizzy. And we have our own playlist. You can go to Spotify, Full Metal playlist, Full Metal Fitness. You can go to the app store, download my app. So I’m coaching guys. We already have a big community of people who are in my app. So I have two offerings. One is the fitness app, and the other one is the free workout. So if you like the free workout and you’re interested in coaching and being part of a community, we have a group. We have group video calls, guys who keep each other accountable, talk about fitness and diet. When you sign up, you get a meal plan, you get a workout tailored to your specific goals, and you get an accountability partner, you get coaching calls. And some of the people, some of the people in our Full Metal Fitness program, and if you go to fullmetalfitness.com, there’s some before and after pictures, but people are getting in insane shape. We’ve built an incredible plan and it’s easy to follow. So if you love metal and you’ve been thinking about getting in shape, and I don’t know anybody who isn’t thinking they could level up their fitness in some way, but you’re gonna put in the time and effort now or you’re gonna be at the doctor… I’d rather be the old guy at the gym than the young guy in the nursing home.”
The attendance figure is well off. Bloodstock Open Air draws a reported crowd in the region of 20,000 to 25,000 across its four days, not 100,000. The 2026 edition marked the festival’s 25th anniversary and ran from August 6 to 9 at Catton Park in Walton-on-Trent, Derbyshire. Biohazard played the Friday, on a bill topped by Lamb Of God and also featuring Sepultura, Municipal Waste and Fit For An Autopsy. The app is hosted at fullmetal.fitness.
Biohazard formed in Brooklyn in 1987 and are one of the earliest bands to fold hip hop into hardcore and metal. The lineup of Seinfeld, guitarist and vocalist Billy Graziadei, guitarist Bobby Hambel and drummer Danny Schuler reunited in 2022 after seven years of inactivity and returned to the stage in 2023. Their tenth studio album, Divided We Fall, was released on October 17, 2025 through Black II Black with Matt Hyde producing. It was the band’s first record in 13 years and the first to feature Seinfeld since 2005.
