[0:00] We both have no butts. [0:02] >> That's my wife. She's trained with one [0:04] of the most jacked personal trainers for [0:06] 10 years. From the outside, her life [0:08] looked perfect. But there was one thing [0:10] stopping her from being truly happy. 5 [0:13] years ago, she hurt her back badly doing [0:15] heavy squats. And ever since then, her [0:18] butt got flat. [0:20] Sorry. [0:22] Flatter than she'd like. But she's not [0:24] alone. I've gone from cake to pancake [0:27] because I not only sit more than I used [0:28] to, but I also find glute training [0:30] extremely uncomfortable. So, I got lazy [0:33] with it. But strong glutes don't just [0:34] make your butt look better in clothes. [0:36] They help you move better, lift [0:38] stronger, and can even help with back [0:40] tightness and knee pain. So, for the [0:41] next 90 days, we're on a mission to [0:44] build our glutes. She'll build hers with [0:46] no squats, no deadlifts, and no heavy [0:48] loading on her spine, whereas I'm free [0:50] to use whatever I want. And if my [0:53] injured wife outgrows me, I go vegan for [0:56] 30 days. [0:56] >> Without crazy heavy weights, without [0:58] squats, without deadlifts, can she still [1:01] grow her glutes? [1:02] >> Yeah, this is a piece of cake. I know it [1:04] sounds impossible to you because you [1:07] built your glutes with heavy squats and [1:09] deads. [1:09] >> That's Brett Contras, the man who [1:11] literally invented the hip thrust and [1:13] has dedicated his life to studying and [1:15] growing glutes. [1:16] >> So, first exercise we're going to try is [1:18] the glute dominant step up. Okay, I want [1:20] you leaning forward a little more and [1:22] reach back right there. Tap. Come back [1:26] up. To build well-rounded glutes, Brett [1:28] recommends doing four movement patterns. [1:30] A lower body press, a lower body hinge, [1:33] a squeeze, and abduction. He's used a [1:36] simple approach to transform even the [1:38] flattest of butts. But because of Tonnie [1:41] sensitive back, we do have to find [1:42] workarounds for the heavy barbell [1:44] exercises Brett would normally use. [1:46] Starting with a lower body press, where [1:48] most people would simply squat. [1:50] >> This looks like a squat. This looks like [1:52] a glute dominant squat, a box squat with [1:54] mostly vertical shins. So, you're [1:56] training the glutes as if you were doing [1:58] a squat. Anyway, so now that we see that [2:00] body weight was tolerated well, we have [2:02] a 15lb dumbbell, so about a 7 kg [2:05] dumbbell. It's a little harder now. [2:07] >> Yeah. [2:08] >> Yes. This is great. What I want is shin [2:10] mostly vertical, thigh parallel. This [2:13] creates the most requisite hip extension [2:15] torque being furthest out. So, she's [2:16] getting the stretch. She's getting the [2:18] torque loading. And then this foot maybe [2:20] a little back right there. [2:22] >> But now we needed a safer hinge movement [2:24] instead of traditional deadlifts. This [2:26] is a single leg dumbbell deadlift, which [2:28] challenges the glutes as much as normal [2:30] deadlifts, but requires much less [2:32] weight. But Brett emphasized the key to [2:34] activating the glutes rather than the [2:36] hamstrings is to keep that knee slightly [2:38] bent. [2:39] >> Yes. Come up. Don't even straighten it [2:41] out. Yep. Oh, that's [2:42] >> Yes. Right there. Just like that. [2:44] Perfect. [2:45] >> Okay. So, I'm not coming like full [2:46] stand. [2:47] >> Yep. Exactly. [2:48] >> How's it feel, Bab? [2:49] >> I feel it. [2:51] >> Another one. Another one. [2:53] >> I'm so weak. [2:55] >> So far, we're two for two as we moved [2:57] into our third type of exercise, the [2:59] squeeze, which in this case happens to [3:01] be the exercise Brett actually invented, [3:03] the barbell hip thrust. [3:04] >> All right, so already I'm thinking, all [3:06] right, feet back a little. You want the [3:08] knee at around a 90° angle. Crawl up a [3:10] little higher on this bench right there. [3:12] Okay. Now, bust out a couple reps. Let [3:14] me see your natural form. I'm watching [3:16] to see if she naturally has a tendency [3:18] to hyper extend the spine. She doesn't. [3:20] So, you might be okay doing regular hip [3:22] thrust. What Brett's watching for as she [3:24] reaches the top of each rep is whether [3:26] she's overextending her hips and [3:28] creating pressure in her lower back, [3:30] which is the most common cause of back [3:31] pain when performing this exercise. To [3:33] avoid this, Brett recommends trying the [3:36] scoop method where you tuck your chin [3:38] down and move from the chest down, [3:40] tilting your pelvis upwards by squeezing [3:42] your glutes. Now, you won't be able to [3:43] get as high, but that's a point. [3:45] >> Eight. Great form. Good lockouts. Yes. [3:48] Okay. [3:49] >> And with Tonnie already lifting heavier [3:51] than she has in years, we just needed [3:53] one more exercise to round out her [3:55] training. A hip abduction movement. [3:58] >> I always call this penalty-free volume. [3:59] You add it in, it doesn't beat you up. [4:01] adds to the glute hypertrophy stimulus [4:03] without fatiguing you much. We're going [4:05] to put these pads right here so that you [4:08] get more active range of motion. Now you [4:10] can hold on the handles. Let's see how [4:12] this feels. Tap. Make sure you come in [4:15] and tap. [4:16] >> For this exercise, you first target your [4:18] upper glutes while sitting upright. But [4:20] if you lean forward at the end of your [4:21] set, you then switch tension to your [4:24] lower glutes. So by pairing both sets [4:26] back to back, you can target multiple [4:28] areas of your glutes to finish off your [4:30] workout. General rule of thumb, if you [4:31] have low back pain, if it feels off, if [4:34] you feel anything during the movement [4:35] itself, don't do it. Skip it. [4:36] >> With the trip to Brett being a success, [4:38] here is the workout plan Ton is going to [4:40] now be using, training her glutes twice [4:42] per week and tracking it all in our [4:44] Built with Science Plus app. As for me, [4:46] while I will be stealing some of these [4:48] exercises, I'll still be doing heavy [4:50] compound exercises like squats and [4:52] deadlifts. So, we'll be able to see if [4:53] that gives me a huge advantage or not [4:55] after the 90 days of training. On day [4:57] one, Tony's glute circumference comes in [4:59] at 92 cm, while mine is just slightly [5:03] bigger at 92.5. But while most people [5:05] think glutes are just about making [5:07] people turn their heads, your glutes are [5:08] actually one of the biggest drivers of [5:11] power, speed, and force production. The [5:13] most explosive athletes almost always [5:16] have incredibly powerful glutes. And [5:18] then there's mine. [5:20] >> Watch out. Watch out. WATCH OUT. WATCH [5:21] OUT. [5:23] OKAY. SO, I also want to see if by [5:25] training my glutes more seriously, it'll [5:27] lead to any improvement in how high and [5:30] how far I can jump without actually [5:32] practicing it, which on day one is [5:34] coming in at [5:37] the winner, right? 51.9. [5:43] >> Oh, [5:45] okay. [5:46] >> Wow. Look how far I can jump. [5:48] >> And with our baselines recorded, it's [5:50] time to start training. [5:55] Whenever I get close to failure, I get [5:57] really angry and really mean. Ow. Ow. I [6:00] hate this one. [6:02] >> Week one was rough. For the past 6 [6:04] months, I've honestly just been lazy [6:06] with my glutes training and so they're [6:07] struggling to keep up. As for Tonnie, [6:09] >> I'm a little concerned because I've just [6:12] finished my first few workouts and my [6:14] glutes aren't really sore and to me [6:16] soreness means growth and development. [6:19] So, I don't know what that's about. [6:21] >> But multiple studies have actually shown [6:23] that soreness is not an indicator of [6:25] growth, which is actually why Brett [6:27] chose some of these exercises. He's [6:29] found that they don't lead to nearly as [6:31] much soreness or muscle damage as [6:32] squats, deadlifts, or Bulgarians do, [6:35] helping Tony recover faster and feel [6:37] less beat up. However, one proposed [6:39] advantage of heavy squats is they boost [6:41] your testosterone levels. Sounds like a [6:43] serious advantage, right? Well, there is [6:45] some truth to this. Heavy squats do [6:47] actually provide a 10 to 20% spike in [6:49] testosterone. And the boost we see with [6:51] squats is higher than it is with other [6:53] leg exercises like leg press. However, [6:56] this boost only lasts about 15 to 45 [6:58] minutes after a workout before returning [7:00] to baseline. So, while it might explain [7:02] why heavy squats make me feel like an [7:04] absolute beast, it's not going to [7:05] provide me with any hormonal advantage [7:07] over Tawni. But speaking of hormones, I [7:10] am noticing a big spike in dopamine as [7:12] it's the first time in years that Tonnie [7:14] and I have trained together. Although [7:16] she says all my enthusiasm can be a bit [7:18] much. [7:19] >> You don't want a hug? [7:20] >> No. Get away from me. [7:22] >> Which makes it difficult when I offer [7:23] coaching or push her to train harder. [7:26] >> Implementing my last set where I did 13 [7:29] reps and I would say I did max effort. [7:31] Like that was my max. [7:33] >> I have to tread very carefully. We could [7:36] put it as max. You did push hard that [7:38] >> I did. So I pushed to my max. But so [7:42] far, things weren't going quite as [7:44] smoothly as we expected. Despite doing [7:47] every exercise correctly, Tonyie was [7:49] very scared of pushing harder, just in [7:51] the fear of hurting her back. Again, [7:53] >> my left leg, like my glute, it feels [7:56] like it's cramping, but also my left [7:58] side is where I have an issue with my SI [8:02] and parapformis. So, it's hard for me to [8:04] decipher if I'm having a glute cramp or [8:07] if I've slightly hurt myself. And on top [8:10] of that, she was struggling to eat [8:11] enough. Not because she wasn't hungry, [8:13] but because she was scared of gaining [8:15] fat. [8:15] >> If I'm laying it all out on the table [8:18] here, I'm on my period. Whenever I'm on [8:20] my period, I always gain a few pounds. [8:23] Usually like 2 to 3 lb. Like I can see [8:25] the water weight. It sits in my stomach. [8:28] It sits like heavier in my face. So, the [8:31] thought of having to put weight on isn't [8:34] a pleasant thought for me. As for me, my [8:36] glutes were finally getting used to the [8:38] new volume and actually started boosting [8:40] my squats, making them feel smoother and [8:42] much stronger. So, today I got squats on [8:44] the menu. And one thing that I'm [8:47] actually doing is just a very subtle [8:48] tweak with my form to emphasize the [8:50] glutes a little bit more. And you guys [8:52] can try this, too. One way of performing [8:54] the squat is a bit more quad dominant. [8:56] And so, your back is upright and you let [8:58] the knees drive forward. But what I'm [9:00] doing is since I want to focus on the [9:01] glutes a little bit more, I'm actually [9:02] going to focus on keeping my shins more [9:04] vertical and pushing my hips back, [9:07] leaning forward a little bit. All it [9:09] does is it shifts the emphasis a little [9:11] bit from the quads, more so to the [9:13] glutes. And hopefully that gives me a [9:15] little bit more of an edge to help win [9:17] this challenge. And while you might be [9:18] thinking squats are giving me a huge [9:21] advantage over Tawni, back in 2023, [9:23] Brett actually ran a study comparing [9:26] squats against hip thrust. And while [9:28] squats did grow the quads and inner [9:30] thighs more, for glutes growth, they [9:32] were both equal. And based on Tony's [9:34] progress so far, it honestly seems like [9:36] I'm the one that was starting to lag [9:38] behind. [9:38] >> I'm telling you, the glutes are popping. [9:42] Holy. [9:43] >> I don't see it, so I don't know. [9:44] >> What do you mean you don't see it? The [9:46] camera definitely sees it. Look at this. [9:48] >> By week three, Tonnie was sending mad [9:50] PRs, and the gains were clearly coming [9:53] in. [9:53] >> Bab, you just did 135 lbs. That's a [9:56] plate. You said [9:58] >> I know. I'm really proud to be honest [10:00] cuz I haven't done this weight in like 6 [10:02] years. My girls are proud of me too. And [10:05] it actually felt really easy. Like that [10:06] was 12 reps. [10:08] >> However, Tonnie is not the only one [10:09] getting the cake. [10:10] >> Week three. [10:13] Wo wo wo. Dennis, you see that? [10:17] >> Wow. If this is week three, can you [10:20] imagine what week 10 is going to be [10:22] like? Go. [10:24] I recently watched Heated Rivalry where [10:26] the actor's glutes blew up online, [10:29] showing the world just how much ladies [10:30] appreciate a strong butt. [10:32] >> How important would you say glutes are [10:35] on a guy? [10:35] >> I like athletic glutes on a guy. I don't [10:38] want like a big booty, but I want you to [10:41] have like [10:43] >> glutes. Yeah. [10:43] >> Okay. [10:44] >> Like we don't want a guy that can just [10:45] do like bicep curls and go do a squat. [10:48] >> Now, technically, Tony actually has two [10:50] big advantages over me. First, based on [10:52] Brett's experience, he's noticed that [10:54] women seem to recover faster from lower [10:56] body workouts than men do and can train [10:58] their glutes with more volume and [11:00] frequency. And while the heavy weights [11:01] I'm using may be a factor, I am noticing [11:04] that by the time Tonnie is ready to go [11:06] for her next workout, I still need [11:07] another day or two to recover, and I [11:09] just can't keep up with how many sets [11:10] she's been doing. But second, and this [11:12] is the biggest factor, about 80% of [11:14] Tony's training right now is dedicated [11:17] purely to glutes. Meanwhile, I'm still [11:19] doing a lot of volume for my quads and [11:21] my upper body. And although this has yet [11:23] to be actually studied, when I wanted to [11:25] grow my shoulders in the past, I scaled [11:27] back everything else and poured more [11:29] volume into my shoulders, and it led to [11:31] the fastest growth I've ever seen. [11:33] Because when your body has fewer [11:34] competing priorities, it can move more [11:36] resources towards one area. So, if that [11:39] same principle applies here, Tonnie [11:41] should be able to outgrow my glutes, [11:43] which is concerning because I love my [11:45] meat. And if she wins, I'm going vegan [11:48] for 30 days. Let's see what measuring [11:49] tape says. 30 days, your booty is up [11:54] exactly 1 cm. [11:56] >> Oh, [11:57] >> was that good? [11:58] >> That's very good. [11:59] >> And now it's my turn to measure my [12:00] glutes after 30 days. The result was not [12:03] what I was expecting. Come on. What are [12:05] we at? [12:07] >> 93.5. [12:08] >> No way. Okay. My glutes have also grown [12:13] 1 cm. [12:15] We are tied. But I may start out growing [12:18] her because based on her tracking in our [12:20] Bit Science Plus app, she wasn't [12:21] reaching her target calorie intake. If [12:23] that continued, her progress might [12:25] eventually stall. So to motivate her, I [12:27] decided to do something I honestly [12:29] hadn't done for her in years. I cooked [12:31] for her. We'll see what she thinks in [12:32] just a sec. But Tanya and I actually met [12:34] about 10 years ago at the gym. But as my [12:36] work got busier and with her back [12:37] injury, we started spending less and [12:39] less time together. So, my hope is this [12:41] experiment gives us more to do together [12:42] and rebuild more than just our bodies. [12:45] Hopefully, I didn't ruin all my chances [12:46] by butchering this food. [12:52] >> Oh my god. [12:53] >> Oh my god. You actually like it? [12:55] >> Mhm. [12:56] >> Oh, [12:57] >> it's really good. [12:58] >> Like a restaurant. [12:59] >> Really? [13:00] >> Mhm. I'm so happy. [13:02] >> It's the first time in a while that we [13:04] actually sat down at home and enjoyed a [13:06] meal together. Now, some of you might be [13:07] thinking Tonyie has a huge disadvantage [13:10] with her diet, that you need to live off [13:12] chicken breast to build muscle. And I [13:13] used to think that, too. But the latest [13:15] research is making me rethink that. A [13:18] new study took two groups of lifters, [13:20] vegans and meat eaters, and had them [13:22] both eat 0.7 g of protein per body [13:26] weight per day. Now, the vegans ate a [13:28] variety of protein sources like tofu, [13:30] soy, and lentils. Whereas the meat [13:31] eaters obviously relied on meat, protein [13:33] shakes, and eggs. Now, you'd expect the [13:36] meateers to have at least a small [13:38] advantage, but after 12 weeks, both [13:40] groups ended up building the same amount [13:43] of muscle and strength. So, as long as [13:44] you're getting enough protein, it [13:46] doesn't seem to matter too much where [13:47] that protein is coming from, which [13:49] honestly makes me slightly less [13:51] terrified of going vegan for 30 days. [13:53] But, I still really do not want to give [13:55] up my favorite foods. And even though [13:56] we're only 30 days in, I do want to see [13:58] if we can pass the bar test. [14:05] I can't even feel it. [14:12] >> Your back stopped it. [14:14] >> Unfortunately, we both couldn't stop the [14:16] bar. But if you watch closely, I kind of [14:19] did manage to stop it a little bit. And [14:21] that is when Tonnie decided to take her [14:23] glute training to the next level. So [14:25] far, Tony's been doing around 20 sets of [14:27] glutes per week and seeing some pretty [14:29] good progress. Holy. [14:32] Wow, that's crazy. [14:33] >> But for Brett's clients that wants the [14:35] most growth possible, he takes this all [14:38] the way up to 30 to 40 sets per week. [14:41] That extra volume seems to speed up [14:43] their growth. And so for Tony, this [14:45] spends ramping up her glute training [14:47] from two to 3 days per week. [14:49] >> And that makes me really nervous because [14:51] I'm not going to lie, with my back [14:53] injury. So it's just like a fear thing [14:55] for me. And I really really hope that I [14:58] don't hurt myself, hurt my back because [15:00] I really want to reach my glute goals. I [15:04] don't want to let Jeremy down. I don't [15:05] want to like get frustrated and let [15:07] myself down. [15:08] >> Now, at first everything felt fine, but [15:10] slowly tightness started building up in [15:12] her upper left glute and then into her [15:15] lower back and eventually this happened. [15:19] And so we decided to put the challenge [15:21] on pause for a few days. H. So, I hurt [15:24] my back at the gym yesterday and I came [15:26] today to try to work out and it's very [15:29] clear that I'm going to need a few days [15:31] off, which is really frustrating for me. [15:34] >> Connie is at work right now, but she [15:36] just sent me a text and uh just saying [15:38] how she's not feeling too well. She's a [15:40] bit sad and I think what's going on is [15:42] that this challenge is putting a lot of [15:46] pressure on her. I think like she not [15:47] only wants to win obviously, but she [15:49] just doesn't want to let you guys down. [15:51] After a few days of rest, thankfully her [15:53] back started feeling better. [15:57] >> I feel so good. [15:59] >> Do you want to go back on the challenge? [16:01] Totally fine if you want to drop out. No [16:03] hard feelings. [16:04] >> Are you scared you're going to lose? [16:06] >> No, I'm trying to be nice. Okay, but [16:09] fine. I'll take that as a sign as you [16:10] are ready to go back and I'm just going [16:12] to say I'm not going easy on you. Okay. [16:14] >> Okay. [16:15] >> All right. [16:15] >> I want you spicy, too. [16:17] >> All right. Let's go. But after just a [16:19] week off of training, Tony's glutes felt [16:21] and looked a bit flatter than usual. And [16:23] she started worrying she was losing [16:24] muscle. And she wasn't just imagining [16:26] it. When you stop training for a week or [16:28] two, your muscles store less glycogen. [16:30] And since glycogen pulls water into your [16:32] muscles, they'll look less full. It's [16:34] kind of like letting air out of a [16:36] balloon. But while your muscles might [16:37] look flatter and your strength might [16:39] also dip because you just haven't [16:41] practiced your exercises, most research [16:43] suggests it takes at least 3 weeks or [16:46] more of no training to start losing [16:48] actual muscle. That said, we definitely [16:50] do not want her to hurt her back again. [16:52] So, even though we might see a bit more [16:54] growth training her glutes three times a [16:56] week, it was a no-brainer to dial her [16:58] training back to just two. And to help [17:00] keep her consistent, we even found some [17:02] creative ways to do her workouts at [17:03] home, which we've even added to our Bit [17:05] with Science Plus app. That way, our [17:06] members don't need to always rely on the [17:08] gym to make progress. And with only a [17:10] few weeks left, Tony's glutes were [17:12] making the fastest progress ever. And if [17:14] I'm going to be honest, even if I lose [17:16] and have to go vegan, this challenge [17:18] really is a win-win for me. While Tony's [17:22] glutes were blowing up, all of my glute [17:24] training was actually leading to some [17:25] unexpected benefits. [17:28] today. That felt more like a jog. My [17:30] treadmill can't even go any faster, but [17:32] definitely feels like my glutes are [17:33] contributing more to the run. Like, it's [17:35] helping me with my run. And all these [17:37] benefits weren't from actually changing [17:38] much to my leg workouts. I mainly just [17:40] started doing hip thrust again and [17:42] experimented with some of Brett's [17:43] exercises, which helped my other [17:45] exercises feel stronger, and more [17:47] importantly, just help my body move and [17:49] feel a lot better than it used to. So, [17:50] if you've been neglecting your glutes [17:52] like I was, just start by adding three [17:54] hard sets of hip thrust to your leg [17:56] days. But with one week before our final [17:58] results, we decided to take a trip to [18:00] Hawaii to show off our glucans. Holy [18:03] moly. [18:05] What the heck do we have here? And on [18:09] the final day of the experiment, she [18:11] didn't just bring the heat to the beach. [18:12] She broke another PR. First time ever, [18:15] two plates on the hip thrust. [18:17] >> I am finally done my glute video with [18:19] Jeremy. I am so grateful that Brett [18:21] Ferris let us come into his home. He [18:24] showed me a bunch of lower back friendly [18:26] glute exercises and I'm forever grateful [18:28] for him for that because doing this [18:30] challenge just showed me that I am [18:32] capable and there are ways of getting a [18:35] booty. As for me, I've got one more [18:37] final test. After 90 days, did these [18:40] glute gains actually improve my jump [18:42] performance? [18:46] So, that is pretty much a 5 cm increase, [18:48] which is pretty impressive. I wasn't [18:50] sure if my glute strength growth would [18:52] impact vertical jump at all. But that [18:55] honestly motivates me even more than [18:57] just the growth is seeing the athletic [18:59] performance there cuz I love playing [19:00] sports too. So my vertical jump went [19:02] from just beating average to now being [19:05] on the high end of above average. Though [19:08] still not enough for my Asian mom to be [19:10] proud, but broad jump scored excellent [19:12] on day one and I still managed to [19:15] increase it by 2 cm. [19:17] >> Not bad. Not bad. But now it's time to [19:19] measure the glutes and see who actually [19:22] grew them the most in the past 90 days. [19:24] Final day is here. I am extremely [19:26] nervous, especially after seeing what [19:27] I'm what I'm up against today. [19:32] I'm done. [19:33] There's no way. [19:36] So, you started at 92 cm and today you [19:40] are at 94 cm. [19:44] 2 cm of growth. Good job, Evie. Good I [19:46] won a 95 now. Did I win? [19:52] >> Please, God. There's no way. [19:55] >> That's where you are. [19:56] >> Yeah. [19:57] >> There's no way. [19:58] >> You can't. [19:58] >> All right. Do it again. [19:59] >> You can't eat them. [20:01] >> You're right here. All right, guys. We [20:02] have measured and I am what? [20:06] >> Plus two, [20:07] >> which means [20:08] >> I am plus 1.5. [20:11] >> Which means [20:12] >> which means I'm I'm cooked. You won. You [20:16] won. You won. You won. I also won. I [20:20] also won. But it wasn't until I tried on [20:22] my wife's shorts that I truly [20:23] appreciated my new glute gains. So, [20:25] while this does mean I have to go [20:27] meatless for 30 days, at least this [20:28] gives Tonnie and I a chance to enjoy [20:30] more dinners together. Oh, and she's got [20:33] some serious cake that I could stare at [20:35] all day. So, still feels like a win for [20:37] me. I'm honestly just so proud of [20:38] Tonnie. She's overcome like some of her [20:40] biggest fears and she's genuinely [20:42] enjoying the gym again. and she did all [20:44] of this without lifting crazy heavy. I [20:46] think it goes to show you that there's [20:48] no musdo exercises. What matters the [20:50] most is good form and choosing exercises [20:53] that actually fit your body and feel [20:55] good. And that is actually why we [20:56] created the Build with Science Plus app. [20:58] Both mine and Tony's workouts are in [20:59] there, but the program adjusts based on [21:02] how your specific body responds to your [21:04] plan. So, you're not just copying [21:06] somebody else. And if you want to try [21:07] it, you can test it out completely free [21:09] for 2 weeks. Just scan the QR code here [21:12] or head to builtwithwithscience.com. And [21:13] if you guys want to simplify your glute [21:15] training and focus on the only two [21:17] exercises you actually need to fix your [21:19] flat butt, give this video a watch next, [21:21] which we recorded with Brett. Thank you [21:23] so much for watching.