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Hypertrophic Principles of Upper Lower Without Rest (Podcast) — Transcript

by Clark Kent · 4,141 words · 675 segments · language en · Watch on YouTube

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  1. 0:03I've been expecting you.
  2. 0:05Welcome
  3. 0:06to my classroom.
  4. 0:10Hey, pay attention. This is
  5. 0:14how to look sick as
  6. 0:18101.
  7. 0:20I want to preface this by saying I'm not
  8. 0:21here to say any specific sources. I've
  9. 0:23come to these conclusions already based
  10. 0:25on the data that I've seen, the podcasts
  11. 0:28I've listened to,
  12. 0:30um and I've also implemented that or
  13. 0:32integrated it in with what I've learned
  14. 0:34through college, anatomy, physiology,
  15. 0:36exercise physiology, etc. So, to me, um
  16. 0:40this always make the most sense how I'm
  17. 0:41about to explain things, and a lot of it
  18. 0:43relies on the actual mechanisms of
  19. 0:45muscle growth rather than a bunch of
  20. 0:47[ __ ] outcomes, right? Because
  21. 0:50I mean, you can walk outside and eat a
  22. 0:51block of cheese when it's raining, and
  23. 0:53then, you know,
  24. 0:54cite data saying, "When I eat cheese, it
  25. 0:57rains outside." Right? That's what an
  26. 0:59outcome is rather than the reason why
  27. 1:02things occur.
  28. 1:03Um so, that's why it's important to
  29. 1:05understand the why things work and not
  30. 1:08just look at
  31. 1:10outcomes from data.
  32. 1:12>> [snorts]
  33. 1:12>> Anyway,
  34. 1:14my training philosophy is based in low
  35. 1:16volume and higher frequency, so at least
  36. 1:19two times a week,
  37. 1:20preferably
  38. 1:22slightly more.
  39. 1:24So, why is lower volume better? First,
  40. 1:28let's talk about muscle protein
  41. 1:30synthesis versus
  42. 1:31myofibrillar protein synthesis. So,
  43. 1:36MPS, which is just the overall muscle
  44. 1:38protein synthesis, that's active during
  45. 1:40any kind of muscle tissue repair, right?
  46. 1:42It can be from just bouts of uh it can
  47. 1:45be from running, like literally any
  48. 1:47exercise at all. It can be some some
  49. 1:49cardiovascular endurance-based training.
  50. 1:51It does not have to be from lifting
  51. 1:52weights. Um
  52. 1:54myofibrillar protein synthesis on the
  53. 1:56other hand, or myops, is more specific
  54. 1:59to hypertrophy because myops refers to
  55. 2:02what's occurring within the actual
  56. 2:04myofibrils of a muscle cell, right? So,
  57. 2:06the contractile units, not the overall
  58. 2:08muscle cell.
  59. 2:09So,
  60. 2:11let's say we do one set in the gym,
  61. 2:14right? We're going to get
  62. 2:17on this This is a graph, by the way.
  63. 2:19Uh dotted line is going to be myops,
  64. 2:21straight line will be muscle protein
  65. 2:22synthesis.
  66. 2:24So, we do a set in the gym,
  67. 2:26get a good spike in myops,
  68. 2:28okay?
  69. 2:29But, with that,
  70. 2:31we're also going to get some
  71. 2:33muscle protein synthesis.
  72. 2:35Yeah, you can see.
  73. 2:38Do another set, you know,
  74. 2:40maybe
  75. 2:42you get a little bit more myops. So,
  76. 2:45at set two, myops is
  77. 2:48gets a little bit more, muscle protein
  78. 2:50synthesis
  79. 2:51going to keep going up.
  80. 2:53Do a third set,
  81. 2:56myops
  82. 2:57is going to go up a little more,
  83. 3:00muscle protein synthesis is going to
  84. 3:01keep going up.
  85. 3:04You do a fourth set, myops is going to
  86. 3:07go up
  87. 3:08and maybe like maybe 10 or 11 more,
  88. 3:11muscle protein synthesis is going to
  89. 3:12keep going up.
  90. 3:14And then, you keep doing more and more
  91. 3:16sets, your myops, right, is going to
  92. 3:18kind of just
  93. 3:20flatline. Your muscle protein synthesis
  94. 3:22can keep going and going and going and
  95. 3:24going and going
  96. 3:26off the damn chart, right? It's not
  97. 3:28necessarily indicative of actual
  98. 3:32contractile tissue growth, okay?
  99. 3:36So, that's why there are studies that
  100. 3:38say, "Oh,
  101. 3:40if I do a ton of volume, the these
  102. 3:42individuals who did
  103. 3:448 million sets, right? Their muscle
  104. 3:46protein synthesis just kept going up and
  105. 3:47up and up and up and it stayed elevated
  106. 3:49for weeks." You know why? Because their
  107. 3:51muscles are trying to recover because
  108. 3:53you've created so much muscle damage,
  109. 3:56not hypertrophy, that yes, your MPS is
  110. 4:00going to stay very high for a long time.
  111. 4:04So,
  112. 4:05what happens after you give it this
  113. 4:08stimulus, right?
  114. 4:10is if you can do a ton of sets,
  115. 4:13your MPS is going to return back to
  116. 4:16baseline. Now, that would usually occur
  117. 4:19within
  118. 4:2148 hours, maybe like 72.
  119. 4:24Um but once it returns to baseline,
  120. 4:27atrophy begins. Your Your body does not
  121. 4:29have a process where you're able to just
  122. 4:32maintain muscle. Muscle growth is very
  123. 4:34binary. You're either growing or you're
  124. 4:36atrophying. Now, obviously the rate of
  125. 4:38atrophy
  126. 4:40um
  127. 4:41is not It's not crazy fast, right? It
  128. 4:43gets faster
  129. 4:45uh the longer you go without giving a
  130. 4:46muscle
  131. 4:47its proper stimulus,
  132. 4:49but it occurs a lot faster than people
  133. 4:51think.
  134. 4:53And so,
  135. 4:54given this fact, right? Your MPS is
  136. 4:56going to return to baseline,
  137. 4:58atrophy is going to start. And so, while
  138. 5:01your muscle is literally atrophying in
  139. 5:03contractile filaments,
  140. 5:07your muscle is Your Your whole muscle is
  141. 5:09still recovering from muscle damage. So,
  142. 5:12you're not getting muscle protein
  143. 5:13synthesis towards building that muscle.
  144. 5:15Your muscle is just trying The muscle
  145. 5:17cell is just trying to recover whilst
  146. 5:20you are literally atrophying still.
  147. 5:22Um there's a lot of immobilization data,
  148. 5:24other things that support this. I can go
  149. 5:27back and and dig all those up. I don't
  150. 5:29know But this isn't that kind of video,
  151. 5:30right? I'm not trying to prove to you
  152. 5:31anything. This is just the reasoning
  153. 5:32that I have come to
  154. 5:35and why I train the way I do.
  155. 5:37So, in essence, on a graph, right? If
  156. 5:40you take a low volume group
  157. 5:42and you look at the time
  158. 5:46versus protein synthesis occurring,
  159. 5:48right? So, in this one,
  160. 5:49um you can see that myops and MPS uh
  161. 5:53come back down to baseline at about the
  162. 5:55same time, which is more favorable,
  163. 5:58right? Because that means muscle damage
  164. 6:00has been repaired as well as
  165. 6:04you know, the stimulus of actual muscle
  166. 6:06growth coming back down. Whereas in this
  167. 6:08graph, right, the stimulus for growth
  168. 6:11has now returned to baseline, and now
  169. 6:14you are still recovering from muscle
  170. 6:16damage, even though maybe with more
  171. 6:18sets, arguably, maybe you can eke out
  172. 6:21like a tiny bit more myops. But, it's
  173. 6:24all about balancing stimulus to fatigue,
  174. 6:26right? It is a net stimulus model.
  175. 6:31I did not coin the term weekly net
  176. 6:33stimulus model. I'm not taking credit
  177. 6:34for that. Um
  178. 6:36but that's one word people use to
  179. 6:39describe it.
  180. 6:40We know that the only thing relevant for
  181. 6:42muscle growth is mechanical tension,
  182. 6:44okay? I'm not debating that. Muscle
  183. 6:46damage is a load of crap.
  184. 6:48I can go run a marathon, create a ton of
  185. 6:50muscle damage, recover from it, and I
  186. 6:52won't grow anything, okay? Look at
  187. 6:54marathon runners. Their legs are not
  188. 6:56big.
  189. 6:57And now that we've put into context
  190. 6:59muscle protein synthesis versus myops,
  191. 7:02why we care about myops instead of
  192. 7:03muscle protein synthesis,
  193. 7:05um there's also plenty of data to show
  194. 7:07muscle protein synthesis does not have
  195. 7:09to be um
  196. 7:12even elevated for myops to occur, which
  197. 7:14is crazy, right?
  198. 7:16So, the point of diminishing returns
  199. 7:18happens a lot more quickly than people
  200. 7:21think. And I can go on a separate
  201. 7:23tangent about fatigue.
  202. 7:26Maybe I will later in the video.
  203. 7:28Um
  204. 7:29but in ensuring that muscle damage and
  205. 7:33recovery has subsided by the time that
  206. 7:36myops returns to baseline, you're able
  207. 7:38to give yourself another
  208. 7:40very efficient bout of stimulus without
  209. 7:43worrying about the recovery demand
  210. 7:45impacting the ability to give that
  211. 7:47stimulus. Right? Because we know if
  212. 7:48you're recovering still from muscle
  213. 7:50damage, you're not really going to be
  214. 7:51able to give the same kind of stimulus
  215. 7:53to the muscle you want to work.
  216. 7:55And so what we're doing essentially is
  217. 7:56we're cutting out the middle man of
  218. 7:57fatigue. So,
  219. 7:59muscle protein synthesis and myops come
  220. 8:01back down, you can give yourself another
  221. 8:03spike throughout the week, right? Just
  222. 8:05give yourself spike after spike after
  223. 8:07spike after spike and efficient myops,
  224. 8:10not just a bunch on one day
  225. 8:15and then you have to wait it out to
  226. 8:17recover.
  227. 8:18You're basically constantly fighting um
  228. 8:21your body's adaptation, right? You're
  229. 8:23You're fighting to keep these
  230. 8:24adaptations. A lot of the ways that our
  231. 8:26body works is rooted in evolution.
  232. 8:28It's very inefficient and metabolically
  233. 8:30expensive to keep muscle. So, what you
  234. 8:31You are You are literally fighting your
  235. 8:34body's biology to keep the muscle and
  236. 8:38you have to do that as frequently as
  237. 8:39possible because atrophy occurs
  238. 8:43very quickly as well.
  239. 8:45So, this is why we do low volume and we
  240. 8:48do high frequency so that we can just
  241. 8:51keep giving ourselves stimulus, comes
  242. 8:53back down, stimulus, comes back down,
  243. 8:55and we're not worried about the fatigue
  244. 8:57aspect or or muscle damage.
  245. 8:59Now, a couple words about fatigue.
  246. 9:02Fatigue is not just feeling tired, okay?
  247. 9:05It's It's negative physiological
  248. 9:06feedback that your your brain picks up
  249. 9:09that you cannot avoid. It's not
  250. 9:11something you can just bypass.
  251. 9:14And when we train, we accumulate fatigue
  252. 9:17within a session and post session. Um
  253. 9:21there are a ton of mechanisms at play. I
  254. 9:24don't need to get super deep into the
  255. 9:26physiology behind a lot of it cuz I just
  256. 9:28I think it's going to overcomplicate it
  257. 9:29unnecessarily. I would never program
  258. 9:31more than two sets for a given exercise
  259. 9:35because I think right around then you
  260. 9:36start to get the
  261. 9:38um
  262. 9:39diminishing returns for sure, especially
  263. 9:41if you want to keep your frequency high.
  264. 9:43Again, right? Arguably, you can still
  265. 9:45get a little a little more stimulus, but
  266. 9:47you're going to be creating a lot more
  267. 9:49muscle damage beyond a certain point.
  268. 9:52And that point occurs very quickly,
  269. 9:55especially when you're training very
  270. 9:56hard. I'm trying not to overcomplicate
  271. 9:58things, but there's just so many little
  272. 10:00nuances and things to take into account.
  273. 10:02It's like, "Woo."
  274. 10:05All right. So, what I personally do is
  275. 10:08an upper lower split without rest unless
  276. 10:10I have to.
  277. 10:13I would not recommend that.
  278. 10:16I just I can't take rest days. So,
  279. 10:22this is the way that I found I can see
  280. 10:24the best results and still train all the
  281. 10:25time. It's super fun. I'm just in an
  282. 10:27infinite cycle of upper lower upper
  283. 10:29lower upper lower. So, that's that's
  284. 10:30Yeah, so the golden rule is to load each
  285. 10:32joint action with at least four or maybe
  286. 10:35six sets for a given week. Um but you
  287. 10:38have to remember which muscles are
  288. 10:40active and some of that overlap because
  289. 10:42it will play a significant role. So, you
  290. 10:44know, think of something like the lats,
  291. 10:46right? The whole lat is active on a lat
  292. 10:49pulldown,
  293. 10:50but, you know, prioritizing shoulder
  294. 10:53adduction is going to be a little bit
  295. 10:55more lower lat, whereas shoulder
  296. 10:57extension is going to be slightly more
  297. 10:59upper lat. And so, I would say if you
  298. 11:03want to be very maximalistic about it,
  299. 11:05on every single upper day, you do one
  300. 11:07set of each exercise for the specific
  301. 11:09joint action, so that you can
  302. 11:12um
  303. 11:13account for a bit of that overlap cuz
  304. 11:15there are I mean, obviously, you're
  305. 11:16still mainly training the same overall
  306. 11:17muscle, it's just slightly different
  307. 11:19regions.
  308. 11:20Same thing with the chest, right? When I
  309. 11:22do an upper chest movement,
  310. 11:24I'm doing some kind of shoulder flexion
  311. 11:27um with slight adduction.
  312. 11:30And then when I do, you know, something
  313. 11:32like a pec deck, I'm prioritizing
  314. 11:34horizontal adduction, um which I'm going
  315. 11:37to get a little bit of upper chest
  316. 11:38activation, but mainly,
  317. 11:40you know, uh mid chest. So, throughout
  318. 11:43the week, right, I'm kind of rotating
  319. 11:45between either doing
  320. 11:47two sets of a joint action that will hit
  321. 11:51every region of the muscle, or on a
  322. 11:54given upper day, I might do one set and
  323. 11:57one set. It just depends on how long
  324. 11:59it's been since you've hit that specific
  325. 12:02joint angle. Because we know that
  326. 12:03atrophy happens very quickly, so because
  327. 12:06hypertrophy is specific to the fibers
  328. 12:08that are experiencing the highest
  329. 12:10degrees of mechanical tension,
  330. 12:13we don't have to worry as much on a
  331. 12:16higher frequency upper lower split about
  332. 12:18atrophy occurring within those specific
  333. 12:20fibers for that given joint angle,
  334. 12:22right? So, um I'm just going to use the
  335. 12:24lats here cuz it's very easy to do so.
  336. 12:26If I were doing something like an upper
  337. 12:28lower rest, upper lower rest, etc. And
  338. 12:32let's say like, you know,
  339. 12:34I hit two sets of a wide grip here, one
  340. 12:37set of a sagittal movement, right? This
  341. 12:38is in the sagittal plane, shoulder
  342. 12:40extension. If I was to do that, like a
  343. 12:41close grip thing, and then a wide grip,
  344. 12:44so I balance biasing the upper and lower
  345. 12:46fibers of
  346. 12:47the lats, and then I go back to a two
  347. 12:50sets of a wide grip on the next upper
  348. 12:52day.
  349. 12:54That's a lot of time before [snorts]
  350. 12:57I would then hit these specific fibers
  351. 13:00in a single arm lat pull down again,
  352. 13:02right? A lot longer than if I were to
  353. 13:04just do
  354. 13:05upper lower, upper lower, upper lower.
  355. 13:09Yes? Does that make sense? So,
  356. 13:12I think if you train that way with rest
  357. 13:14days on your upper and lower days, um
  358. 13:17you can get away with a little bit more
  359. 13:18volume, and you also don't have to worry
  360. 13:21about leaving a rep in reserve. I would
  361. 13:23say if you do what I do with upper lower
  362. 13:25without rest, you need to leave a rep
  363. 13:28reserve on some sets. I would definitely
  364. 13:31recommend it. Just experiment a little
  365. 13:32bit, throw it in there.
  366. 13:34Um
  367. 13:36Again, this is just kind of an overview.
  368. 13:38But as far as like indirect work for
  369. 13:40secondary muscles goes, I do not count
  370. 13:42that in my volume.
  371. 13:43Um I do not count back training towards
  372. 13:45biceps. I think if you do that, you are
  373. 13:47doing something horribly wrong.
  374. 13:49Um same with triceps and chest, like any
  375. 13:51of that. I think that's a load of
  376. 13:52garbage. You do have to keep some of
  377. 13:54these overlaps in mind and nuance it a
  378. 13:57lot more when you do upper lower with no
  379. 14:00rest days, right? Because the fatigue
  380. 14:02cost is going to be greater than if you
  381. 14:06were to actually take programmed rest
  382. 14:08days.
  383. 14:09Sometimes if I'm doing something like a
  384. 14:10shoulder press on a given day, right?
  385. 14:12I'm going to be mindful of when I train
  386. 14:15shoulder flexion for the upper chest
  387. 14:16because that's going to destroy my front
  388. 14:18delts. So maybe on that day,
  389. 14:21um where I have a shoulder press
  390. 14:22program, I could do something like just
  391. 14:24doing a pec deck. And then the next
  392. 14:26upper day,
  393. 14:27um
  394. 14:28I can do one set of a pec deck and then
  395. 14:30one set of an upper chest thing.
  396. 14:32And by only having 48 hours between
  397. 14:34that, I know that uh
  398. 14:37my upper chest fibers are not going to
  399. 14:39atrophy that much just because
  400. 14:41um that prior workout, I did not hit it
  401. 14:44specifically.
  402. 14:45Right? And they're also getting a slight
  403. 14:47indirect stimulus from pec deck. So a
  404. 14:49lot of these things are very, very
  405. 14:51nuanced.
  406. 14:52In summary,
  407. 14:54with upper lower on a higher frequency
  408. 14:57without rest days, I don't have to worry
  409. 14:59as much about training those specific
  410. 15:02joint actions because those fibers will
  411. 15:05not experience as much atrophy as
  412. 15:10if I were doing upper lower with rest.
  413. 15:13If they're doing upper lower If I was
  414. 15:14doing upper lower with rest days, I
  415. 15:15would worry a little bit more. So
  416. 15:17basically, as I go throughout the week,
  417. 15:19I'm I'm rotating all these exercises
  418. 15:21here and there. I just like, you know, I
  419. 15:23look at my notes, I'm like, "Okay, did I
  420. 15:25hit this joint action last time? Oh, I
  421. 15:27didn't do any direct work for these
  422. 15:29specific muscle fibers. Okay, I'll throw
  423. 15:31that in this workout." And then if I did
  424. 15:33do that the workout before, then I'll
  425. 15:34say, "Eh, it's fine. I don't need to
  426. 15:37worry about hitting the specific fibers.
  427. 15:39I can mitigate that atrophy a little bit
  428. 15:41just by hitting the overall muscle um
  429. 15:45and prioritizing maybe, you know, a
  430. 15:48different part of that same muscle, if
  431. 15:51that makes sense. Not all joint actions
  432. 15:55are created equal within the same muscle
  433. 15:57regions if if a certain part within a
  434. 16:01muscle group or muscle does not have the
  435. 16:05same attachment. So, let me explain,
  436. 16:09right? If I'm hitting hamstrings, the
  437. 16:11whole hamstring except for the biceps
  438. 16:14femoris short head, I believe, is
  439. 16:17trained when you do a stiff-legged
  440. 16:19deadlift. So, in order for
  441. 16:22my biceps femoris short head to not
  442. 16:25atrophy,
  443. 16:26um I'm making sure that I hit a
  444. 16:29stiff-legged deadlift on one hamstring
  445. 16:32focus day, and I do at least, you know,
  446. 16:35just throw in one set of a hamstring
  447. 16:37curl. And then on the following lower
  448. 16:39day, I'll do two sets of a hamstring
  449. 16:41curl,
  450. 16:42but not work on the hinges.
  451. 16:45So,
  452. 16:46I'm making sure the biceps femoris short
  453. 16:48head's not experiencing any atrophy, um
  454. 16:51and still benefiting from high
  455. 16:52frequency. Same thing goes for the long
  456. 16:54head of the triceps, right? Because the
  457. 16:56long head of the triceps does shoulder
  458. 16:59extension, if I do a movement that
  459. 17:01involves shoulder flexion, right? Think
  460. 17:03of a press or like a JM press,
  461. 17:05the long head of the tricep is shut off,
  462. 17:08and it's not active, um because you're
  463. 17:10creating antagonist joint torque at one
  464. 17:14part of the tricep by doing shoulder
  465. 17:16flexion. Like, think of a rubber band,
  466. 17:18right? You're like stretching it at one
  467. 17:20end, but then you're shortening it at
  468. 17:22another. So, nothing's happening. It's
  469. 17:24not producing any any work because
  470. 17:26you're performing the opposite joint
  471. 17:27action at one end of the muscle in this
  472. 17:30in this long head specifically. So, if
  473. 17:32you want the long head to benefit from
  474. 17:33high frequency,
  475. 17:35right? Let's say one upper day I do one
  476. 17:37set of a JM press and one set of a, you
  477. 17:39know, normal rope extension.
  478. 17:42Right? Cuz a rope extension will hit all
  479. 17:43heads of the tricep, but also hit the
  480. 17:46long head. The next upper day, I'll just
  481. 17:47do two sets of a rope extension with no
  482. 17:50JM press, and that's going to hit all of
  483. 17:51the tricep heads.
  484. 17:53Again, these are very slight nuances.
  485. 17:55Um, I would not worry about trying to
  486. 17:57bias little things like that.
  487. 17:59Um,
  488. 18:00especially if you're newer to training.
  489. 18:02It matters a lot more if you're really
  490. 18:03trying to squeeze out the last bit of
  491. 18:05recruitment you can from those those
  492. 18:07those specific fibers, you know what I
  493. 18:09mean? When like biasing stuff. So,
  494. 18:10another thing with upper lower is
  495. 18:13what matters the most in terms of what
  496. 18:15you want to prioritize is how you
  497. 18:16sequence things.
  498. 18:18Um, personally, you know, I leave arms
  499. 18:19for the end for instance of every upper
  500. 18:21day because I know that that's a strong
  501. 18:23point for me, but
  502. 18:26I do rotate through having a different
  503. 18:27focus on every upper day
  504. 18:29um to
  505. 18:31maximally recruit those top end muscle
  506. 18:33fibers. So, I have one day where I do a
  507. 18:35shoulder focus, one day where I do a
  508. 18:37back focus, and one day where I do a
  509. 18:39chest focus. And all I'm doing, I'm not
  510. 18:40adding more volume. I'm just hitting it
  511. 18:42earlier in the session. The upper and
  512. 18:44lower days that I post I I do exactly as
  513. 18:47shown with that exact rep scheme.
  514. 18:50I can talk about a couple other things,
  515. 18:52right? Like rep schemes. Uh, we know
  516. 18:55that
  517. 18:56with things like fatigue, higher reps
  518. 18:59are going to give you more of that
  519. 19:00typically for no additional benefit
  520. 19:03unless you are so stupid that you can't
  521. 19:06standardize your form with low reps.
  522. 19:11I hate when people say that. like Oh, uh
  523. 19:14uh volume is bad because like you can't
  524. 19:16standardize your form if you do lower
  525. 19:17reps. Like
  526. 19:19Okay, then just standardize your form.
  527. 19:21Don't be an idiot. But lower volume
  528. 19:23allows us to preferentially bias those
  529. 19:26harder to recruit muscle fibers that are
  530. 19:28only turned on during the highest
  531. 19:29degrees of effort. So, by um decreasing
  532. 19:33our perception of effort, you know,
  533. 19:34picking stable exercises, lower rep
  534. 19:37ranges, you know, maybe like the four to
  535. 19:39seven-ish range. That's usually what I
  536. 19:40stick to.
  537. 19:41Um
  538. 19:43you are allowing your body to send a lot
  539. 19:45more of that effort perception towards
  540. 19:49your actual set, right? So, you're able
  541. 19:51to get more what we call motor unit
  542. 19:53recruitment, which just refers to the uh
  543. 19:56body's like the degree of neural drive
  544. 19:58you get to the muscle because it'll at
  545. 20:00the end of the day it is all
  546. 20:01neuroscience, truly.
  547. 20:03And our brain has finite resources,
  548. 20:06right? If we could just train every
  549. 20:09muscle at the same time we would, but
  550. 20:10you can't do that because of your
  551. 20:13perception of effort.
  552. 20:14So, in preferentially biasing those type
  553. 20:162X fibers to the max, which, you know,
  554. 20:18they experience atrophy quickly, like
  555. 20:20all that, you're going to be growing a
  556. 20:21lot more than if you're doing a bunch of
  557. 20:23garbage volume um and using muscle
  558. 20:25fibers that are lower down the motor
  559. 20:27unit pool.
  560. 20:28Now, when I say the word motor unit
  561. 20:29pool, that just refers to um
  562. 20:35every level of muscle fiber that is
  563. 20:37recruited based on
  564. 20:39how much neural drive is going to them.
  565. 20:42And so, something like a type one fiber,
  566. 20:43which is aerobic, right? Used for things
  567. 20:46like running, day-to-day exercise or
  568. 20:48activity, they are always active and
  569. 20:52they will be maximally recruited every
  570. 20:53time that you maximally recruit type 2X
  571. 20:56fibers.
  572. 20:58But on the flip side
  573. 20:59trying to max out lower down muscle
  574. 21:01fibers
  575. 21:03is going to give you a very quick point
  576. 21:05of diminishing returns because they are
  577. 21:07maxed out very quickly and sure they
  578. 21:10have some capacity for growth.
  579. 21:14And now you know muscle fibers like it
  580. 21:15is a spectrum from type one to type two
  581. 21:17X.
  582. 21:18They're still there's no point in trying
  583. 21:19to go lower down the motor unit pool to
  584. 21:22bias those fibers when
  585. 21:24they're going to grow regardless
  586. 21:27and you could be spending that time
  587. 21:29instead maxing out your type two X
  588. 21:30fibers which have a lot more capacity
  589. 21:32for growth
  590. 21:33and as a byproduct
  591. 21:35the all the other muscle fibers will
  592. 21:36still be getting good enough stimulus to
  593. 21:38grow.
  594. 21:39But yeah, the fiber type argument is
  595. 21:41another reason why lower volume is
  596. 21:42better and why we don't need to bias
  597. 21:45those lower down fibers and we want to
  598. 21:47maximize our motor unit recruitment
  599. 21:49because you cannot get maximum motor
  600. 21:51unit recruitment if you have a lot of
  601. 21:52fatigue and muscle damage built up that
  602. 21:54you need to also recover from.
  603. 21:56And if there is a specific muscle region
  604. 21:58that you want to bias
  605. 22:00then make sure you are giving it proper
  606. 22:01frequency and the proper stimulus to
  607. 22:04grow. I think that
  608. 22:06that about sums up why I do upper lower
  609. 22:09six days a week um very low cortisol
  610. 22:13split and I get to train every single
  611. 22:14day and do all the optimal low volume
  612. 22:17[ __ ] without all the fatigue. I can get
  613. 22:20into each of those specific mechanisms
  614. 22:22more in other videos. This is just kind
  615. 22:23of a scatterbrained ramble. Thanks for
  616. 22:26watching. I'm going to see you Alex in a
  617. 22:27couple days
  618. 22:28and um
  619. 22:29I also have a full presentation on
  620. 22:31neural mechanical matching that I made
  621. 22:33back at college. So if you all want to
  622. 22:36see that badly enough I'll drop it. It
  623. 22:38basically just refers to
  624. 22:40um
  625. 22:41training muscles where they have the
  626. 22:42best leverage and why and
  627. 22:46guess it's more like analyzing
  628. 22:47biomechanical stuff but
  629. 22:50yeah.
  630. 22:51Hope this helps and um hope you guys
  631. 22:53study cuz there's going to be a quiz at
  632. 22:55the end of my semester. There's no
  633. 22:57summer break around here.
  634. 23:01Thanks for watching.
  635. 23:05I could also talk about central nervous
  636. 23:07fatigue, which I didn't really
  637. 23:10because my split kind of ignores that a
  638. 23:12little bit.
  639. 23:13But again, when you're doing less
  640. 23:14volume, you're not building up as much
  641. 23:15central nervous fatigue. I don't know. I
  642. 23:17think a lot of that is overstated.
  643. 23:22If you're not familiar with what central
  644. 23:23nervous fatigue is, basically when
  645. 23:26muscle damage is present, your body has
  646. 23:28receptors that pick up that damage
  647. 23:32and they send that signal through your
  648. 23:33bloodstream.
  649. 23:35Those those, you know, those
  650. 23:36inflammation signals through your
  651. 23:37bloodstream to
  652. 23:38your brain and your brain's like, "Eh, I
  653. 23:40don't want to train as hard now because
  654. 23:42of that muscle damage I have to repair."
  655. 23:45Which is why usually
  656. 23:47I would advocate for taking rest days.
  657. 23:51Which is why I think
  658. 23:53like it's better to take rest days than
  659. 23:55not at all.
  660. 23:58But if you're doing already like pretty
  661. 23:59low volume you're probably going to have
  662. 24:01less muscle damage to recover from in
  663. 24:03the first place, um thereby not having
  664. 24:05as much central nervous fatigue. You're
  665. 24:07getting less of those signals, less
  666. 24:09infla- inflammatory signals, right? Um
  667. 24:12so because the way CNS fatigue works is
  668. 24:15even if I do like biceps the day before
  669. 24:18and then I go hit legs the next day your
  670. 24:20brain is still going to be detecting
  671. 24:22those signals of inflammation from the
  672. 24:23muscle damage in your biceps and so
  673. 24:25you're going to get less recruitment
  674. 24:27that your brain is able to give and
  675. 24:28allocate towards your quads.

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