Dr. John Rusin's 6-Phase Dynamic Warmup Explained

Most gym pain does not announce itself as an injury. It shows up as a familiar ache that never quite resolves: the shoulder that catches when the bar touches the chest, the lower back that tightens after every deadlift session, the knee that clicks on the way down into a squat. Dr. John Rusin, a physical therapist who deliberately never took a clinical job after finishing his doctorate, has spent his career studying that gray zone. He calls it subclinical pain, and he says it is the condition that quietly runs most active adults' training lives (08:37).

Rusin's own path to this specialty was accidental. He grew up the son of two doctorate holders in Buffalo, played college baseball, took a strength and conditioning job, and enrolled in physical therapy school almost by default, using a scholarship while he kept coaching (02:10). Three months in, he realized he had no interest in the clinical track. Of his 74-person graduating class, he was the only one who went back into sports performance instead (03:22). What he kept from the degree was a working theory of how bodies break down gradually, which he then applied to athletes and everyday clients who were never going to see a hospital but were quietly moving worse every year.

The first problem Rusin solves on the podcast, hosted by human performance professor Dr. Andy Galpin, is a diagnostic one: how does a person know whether what they are feeling is an acute injury that needs medical attention, or a chronic pattern that training can fix? Rusin offers two criteria. The first is mechanism and duration: was there a clear traumatic event, and how long ago did it happen. If pain persists past what he calls the 48-hour rule, meaning it has not begun improving within two days of onset, it is time to get it checked out rather than assume it will resolve on its own (11:58). The second is intensity, using a zero to ten subjective pain scale. Above a five or six out of ten, Rusin considers that a clinical injury rather than an ache to train through (12:18). Below that threshold, and without a clear traumatic origin, what a person is dealing with is very likely the movement-based dysfunction his system is built to address.

The prevalence data he cites is striking. Chronic front-sided shoulder pain is the single most common presentation among active populations he sees, ahead of generalized low back pain, front-sided knee pain, and a split between elbow and hip complaints (13:06). None of these, he argues, typically need a clinical diagnosis. What they need is what he calls a movement diagnosis: identifying exactly which compensation pattern is producing the pain, and reversing it.

Why the Warmup Is Not Optional

Rusin's answer to that compensation problem is a six-phase sequence he now calls a daily maintenance protocol rather than a warmup, because he wants clients running it on non-training days too. Done well, it takes 10 to 12 minutes (24:02), roughly one to two minutes per phase, and each phase has a distinct physiological job.

Phase one is soft tissue work, usually foam rolling, but Rusin is explicit that the mechanism is not what most people assume. He does not believe a foam roller breaks up scar tissue or lengthens muscle; that would require surgery, he says (35:20). What it does instead is introduce a novel external stimulus onto an internal system, which appears to down-regulate the nervous system's baseline tension, or tonicity, and open a short window of improved range of motion. The dose matters here: Rusin caps subjective discomfort at four out of ten (33:13), because higher pain intensities trigger a sympathetic, fight-or-flight response that works against the goal.

"What is more sympathetic in the world than pain? Pain is the most sympathetic thing that there is." (Dr. John Rusin, 33:13)

Phase two is stretching, but not the static kind. Rusin uses what he calls dynamic oscillatory stretching: finding an authentic end range, one the person can still control with a neutral spine and grounded feet, and pulsing gently in and out of it for roughly 45 to 60 seconds per side, breathing deeply throughout. Phase three is a corrective exercise, something like the bird dog, used to actively explore whatever range of motion phases one and two just opened up. Rusin does not count sets and reps here; the goal is simply to feel something new (71:40).

Phase four is activation, and this is where a specific number becomes a rule of thumb: three to five sets of three to five reps, using exercises like the hip thrust to restabilize the new range with real muscular tension rather than the gentle exploration of phase three (75:31). Phase five is pattern rehearsal, using light loads to practice whichever movement, a squat, hinge, lunge, push, or pull, is the heaviest lift planned for that day, so the nervous system has already rehearsed the pattern before fatigue and real load enter the picture. Phase six is central nervous system stimulation: skips, jumps, throws, and other ballistic movements meant to raise arousal right before the actual training session begins (100:21).

Underneath all six phases is a simple, recurring idea Rusin repeats throughout the conversation: tightness and weakness are not opposites requiring different fixes, they usually coexist in the same joint.

"Tight and weak happen simultaneously... that is why we mobilize and then we restabilize with activation." (Dr. John Rusin, 41:09)

He formalizes this as the motor control gap: the difference between how far a joint can move passively, with help, versus how far someone can control it actively on their own. A gap of 15 to 20 percent is considered normal (43:04). When the gap grows much larger than that, the person has range of motion their body cannot yet stabilize, and that unstabilized range is where pain and injury tend to concentrate (43:33). The same logic explains why hip structure varies 12 to 15 percent right to left in shape and orientation (46:02): perfect bilateral symmetry was never realistic, and chasing it is the wrong goal.

Form Is Not Fixed, and Neither Is the Spine

Rusin pushes back hard on the idea that there is one correct way to squat, deadlift, or bench press for every body. Good form, he argues, is relative to a person's limb lengths, injury history, and goals, not a universal template (107:02). But he does hold firm lines on two criteria: can the spine stay within what he calls its neutral zone through the full movement, and is there marked asymmetry, like a knee caving on one side and not the other (110:02). Crucially, that neutral zone is not fixed. It narrows as load and speed increase, and widens with better sleep, lower stress, more training experience, and a completed warmup (113:43). A world-record deadlift performed with visible spinal rounding can still be safe if the lifter earned that range gradually; a novice attempting the same shape under heavy load has not.

This is also why Rusin refuses to teach a mixed grip on the deadlift, regardless of the lifter's level. The underhand hand in a mixed grip is exposed to rapid, forced eccentric elbow flexion if the bar starts to slip, which he identifies as the direct mechanism behind most grip-related bicep tears at the deadlift (116:32). He would rather see straps, a hook grip, or a double overhand grip, even for competitive powerlifters training outside of contest prep.

The same attention to mechanism shows up in his critique of the standard face pull. Most gyms coach it with an underhand grip and a long pull to the face, which Rusin says trains the wrong muscles, compensates through the lower back, and skips the internal-to-external rotation the shoulder actually needs (83:37). His version uses an overhand grip, rotating thumbs from pointing down to pointing up, with the elbows, not the hands, driving the motion back to roughly ninety degrees of bend (88:00). It is a small technical correction, but it reframes an exercise most lifters treat as filler into a targeted corrective, and it reflects the habit running through the whole conversation: check the mechanism, not just the outcome.

That same evidence-first habit shows up in Rusin's loaded carry standards, drawn from research he published roughly a decade ago in the NSCA Journal. To be discharged from physical therapy, a person should carry 50 percent of body weight for 30 seconds. General fitness requires 100 percent of body weight for the same duration. Elite sports performance requires 200 percent of body weight in a trap bar carry for 30 seconds (135:16, 135:40). The numbers are memorable, but the underlying claim is the same one that structures the whole hour: strength, built patiently and tested honestly, is the highest-return investment a body can make, and pain is usually not a life sentence but a signal that the movement system needs a smarter rebuild.