The 6 Newest Ways to Build Muscle Proven by Science (try them today)

He explains the POS1 study where participants doing 32 sets per exercise per week gained 23% more CSA than those doing 10 sets. This was largely due to increased cycloplasmic proteins, intracellular water, and glycogen, which persisted ~8 days. The supercompensation effect occurs because the body anticipates higher training demands and stores more glycogen, pulling water along. The higher ATP demand during high volume increases cycloplasmic enzymes (creatine phosphate, etc.), which later support greater energy production for future training. The swelling from the pump stretches integrins, which are mechanosensors that activate MAPK and mTOR signaling to initiate permanent protein synthesis. Thus, temporary sarcoplasmic expansion can seed lasting myofibrillar growth. He suggests that you don't need to sustain high volume; occasional spurts are enough to reap these adaptations, aligning with Dr. Mike Israetel's block periodization concepts. The key is to layer this stimulus on top of standard mechanical tension training. He emphasizes not to go high volume all the time to avoid burnout.

He admits the science isn't settled, but notes that many highly fit academics use isometrics and maintain impressive physiques. He sees strong anecdotal evidence and ties it to the role of pain tolerance in progressive overload: “Muscle growth is rewarded to the person that can endure pain.” Isometrics are a safe way to practice enduring extreme muscular pain, which may translate to pushing harder during traditional sets. Moreover, they may strengthen the specific joint angles trained, building confidence and stability. He suggests simple movements like wall sits, or holding a low squat. This is a small addition, not a replacement for dynamic training. He remains bullish but cautious.

He first discusses the Frontiers in Physiology study where high volume beat high load, then the 2020 meta-analysis that strength gains at moderate/heavy loads best predict hypertrophy. The takeaway is that the average person doesn't need to max out; doing more total work with a weight that allows 8-12 reps close to failure is more effective and sustainable. He emphasizes that this classical pathway is foundational, and the other methods are layered on top. It's about relative strength improvement, not absolute numbers. So the protocol is to structure training around progressing in moderate load exercises while using the other methods for occasional sprints.

He cites two studies: (1) Six-week program comparing high volume vs high load, where the high volume group had more CSA and higher muscle protein synthesis, despite using moderate loads. (2) A 2020 review of 28 studies concluding that muscle strength gains — not the absolute load — are the superior marker for hypertrophy, provided the strength is improved at moderate or heavy loads, not just light loads. This implies proximity to failure and volume are key. For the average person, chasing max lifts is less effective than accumulating volume with a challenging but manageable weight. He still recommends progressive overload and getting stronger over time, but within a moderate rep range.