Adjunctive Therapies

01What the trials show

The Numbers Behind the Adjunctive Modalities

Eight findings, nulls included, because the nulls are half of this record and they are the half that teaches.

02Around the adjustment

Every Adjunctive Therapy Sits on One Axis of Magnitude

Adjunctive therapies are everything a sports clinician uses alongside the adjustment to care for an injured athlete: the modalities, the soft tissue work, the taping and the graded loading. They are not afterthoughts. Each one delivers a different quantity of input to a nervous system that is already in a particular state, and that state decides much of what follows.

The adjustment restores joint motion and floods the cord with mechanoreceptor input, and the orthopedics lesson What an Adjustment Is Really Doing carries the cavitation and afferent discharge record. The adjunctive layer makes that input stick.

Each tool in that layer feeds specific sensory and motor information back into the nervous system. It is aimed at the inflammatory environment and at the pain and spasm cycle. It reloads the tissue in a graded, deliberate way, so the new motion is not lost the moment the athlete leaves the table.

Connective tissue injury runs a predictable cascade of reaction, then repair, then remodeling. Principles of Rehabilitation carries the healing timelines and the loading rules that go with them, and Inflammation and Healing carries the inflammatory program itself. Each phase calls for different tools, and reading the phase correctly is what separates a clinician from a technician.

The framework is simple and ruthless

Choose the intervention with the highest benefit and the lowest risk available at that phase. That rule is easy to state and hard to run, because the modality literature will not tell you which intervention that is. A systematic review of 22 randomized trials of ice for acute soft tissue injury returned a mean methodological score of 3.4 out of 10 Bleakley 2004. It found no evidence of an optimal mode or duration of treatment.

Read that carefully. The question the trials answered was whether the instrument was used, and the question a clinician has to answer is how much of it to use, on which tissue, in which week. The same review found marginal evidence that ice combined with exercise did better than ice alone after ankle sprain and after surgery. The pairing beat the instrument.

A modality is a magnitude of input rather than a rank in a table. Sound, light, current, cold, hands, needles, tape and load differ in how much they deliver and in how much information they carry. The athlete's state on the day decides which of those sizes lands.

03Sound into tissue

Therapeutic Ultrasound Is the Cleanest Null in the Modality Record

Therapeutic ultrasound returns nothing against placebo in the best pooled evidence, and it remains one of the most used machines in a treatment room. Ten randomized trials of 1,025 people with chronic low back pain produced a mean difference of 7.12 mm against placebo on a 100 mm pain scale Ebadi 2020. The confidence interval ran from 17.99 in favor of ultrasound to 3.75 against it.

The same review found moderate certainty evidence of no difference in the number of people reaching a 30 percent reduction in pain, at a risk ratio of 1.08. Back-specific function shifted slightly, at a standardized mean difference of 0.29 on low certainty evidence. Current clinical guidelines do not recommend the machine for this condition, and physiotherapists continue to use it.

The record had this shape two decades earlier. Of 35 randomized trials of therapeutic ultrasound published between 1975 and 1999, 10 met the standard the reviewers set for method Robertson 2001. Two of those favored active ultrasound over placebo, in carpal tunnel syndrome and in calcific tendinitis of the shoulder. Eight did not.

The trials asked whether the machine was on, not how much it delivered

Dosage is the variable nobody controlled. The reviewers recorded that intensities and durations varied considerably across the studies with adequate methods, often for no stated reason, and that those few studies covered a wide range of different patient problems. A pooled null built out of scattered doses aimed at scattered conditions is not a verdict on the physics.

The wider electrotherapy literature has the same fault line. A Cochrane review of electrotherapy for rotator cuff disease gathered 47 trials and 2,388 participants, and none of the data could be combined in a meta-analysis Page 2016. Only 16 of the 47 trials tested a modality in isolation, and only 23 percent were rated at low risk of allocation bias.

The Unified Model of Tone predicts a record of exactly this shape. There is no such thing as an input acting upon an empty body. A trial that records whether the machine was switched on, and never records the state it was switched on into, has measured the wrong variable. The instrument is a constant across a trial. The nervous system receiving it is not.

04Light and current

Laser and Electrical Stimulation Move Measures That Ultrasound Does Not

Low-level laser therapy moves the pain scores that therapeutic ultrasound leaves untouched. Across 16 randomized trials and 820 patients with neck pain, laser reduced pain intensity by 19.86 mm on a 100 mm visual analog scale Chow 2009. Five trials of chronic neck pain reporting categorical outcomes returned a relative risk for improvement of 4.05.

Seven of those trials followed patients for 1 to 22 weeks after treatment ended, and the relief held at 22.07 mm. Side effects were mild and no different from those of placebo. Efficacy and safety are separate questions, and in this literature they have separate answers.

The athletic version of the same instrument is studied against a different endpoint. In 13 randomized trials rated 6 or better out of 10 for method, phototherapy raised time to exhaustion by 4.12 seconds and repetitions by 5.47 against placebo Leal-Junior 2015. Twelve of the 13 applied the light before the exercise rather than after it.

The consistent results came from red and infrared wavelengths, power outputs of 50 to 200 milliwatts, and doses of 5 to 6 joules per point. Timing and dose carried the finding. The device label did not.

Current does one thing alone and a different thing in company

Interferential current is the clearest demonstration on this page that a modality has no fixed value. Across 20 studies of musculoskeletal pain, the current used on its own was no better than placebo or another therapy, at discharge or at follow-up Fuentes 2010. Added to another intervention, it beat a control treatment at discharge and beat placebo three months later.

The reviewers are direct that they cannot tell whether the analgesic effect belongs to the current or to the interventions it was delivered with. Same machine, same settings, two different verdicts, decided by what else was in the room.

The settings themselves are open. Interferential and Russian currents both deliver kilohertz frequency alternating current, and a review of the laboratory work concludes that the clinically standard parameters are suboptimal for their stated goals Ward 2009. Short rectangular bursts of 2 to 4 milliseconds, at a frequency picked for the intended outcome, produce more force with less discomfort.

Where electrical stimulation has its firmest record is the situation an athlete cannot solve voluntarily. After anterior cruciate ligament surgery, neuromuscular electrical stimulation added to standard physical therapy raised quadriceps strength at 4 to 12 weeks with a standardized mean difference of 0.73 across six pooled trials Hauger 2018. Physical function improved more in those groups too.

These currents speak the cord's own language, sensory and motor, and the brain listens. In the weeks after a knee reconstruction the athlete has temporarily lost access to their own quadriceps, and the stimulator delivers the drive the voluntary route cannot. That is a matched input, and it is why this application separates from the rest of the electrotherapy record.

05Cold and the training block

Cold Lowers Soreness and Can Remove Part of the Adaptation

Cold water immersion has the strongest soreness data of any passive modality on this page and the most awkward long-term record. Seventeen trials and 366 participants put it ahead of passive rest for muscle soreness at every follow-up Bleakley 2012. The standardized mean differences were 0.55 at 24 hours, 0.66 at 48 hours, 0.93 at 72 hours and 0.58 at 96 hours.

Set against an active comparison the advantage disappears. Pooled pain data showed no difference between cold water and contrast immersion at any of four follow-up points, and the same held against warm water immersion at 24, 48 and 72 hours. Study quality was low, and most trials ran no active surveillance for adverse events, which leaves the safety question open rather than answered.

Phase still decides the choice. Cryotherapy is the acute phase tool, applied while vasoconstriction and then swelling dominate the tissue. Heat comes after that window closes, to raise superficial circulation and reduce the guarding and contracture that follow an injury. Ice combined with exercise carried what evidence there was after ankle sprain and after surgery Bleakley 2004.

The same immersion, aimed at a different goal

Twenty-one physically active men strength trained twice a week for 12 weeks, with either 10 minutes of cold water immersion or active recovery after every session. Strength and muscle mass rose more in the active recovery group Roberts 2015. Isokinetic work rose 19 percent, type II fiber cross-sectional area 17 percent, and myonuclei per fiber 26 percent in that group, and none of the three moved in the immersion group.

The mechanism was measured in the same paper. Nine men did single-leg strength work, and satellite cells expressing NCAM rose 10 to 30 percent and Pax7 20 to 50 percent at 24 to 48 hours after active recovery. Both counts finished higher after active recovery than after immersion. Phosphorylation of p70S6 kinase rose in both conditions and rose further after active recovery.

A second trial found the split runs through the middle of the outcome list. Sixteen men trained three days a week for seven weeks. Afterward they sat 15 minutes in water at 10 degrees Celsius or 15 minutes at 23 degrees. Leg press one-repetition maximum improved by a pooled 130 kg in both groups, while type II fiber cross-sectional area was attenuated in the cold group Fyfe 2019.

Two well-run trials, one input, and the answer depends on which measure you read and which athlete you read it in. The Unified Model of Tone reads that as the input law rather than as a contradiction. Cold in the hour after a tournament match meets a system whose problem is soreness. Cold in week three of a hypertrophy block meets a system whose problem is that the training signal has to survive the night.

That is a claim about matching, and it is testable in a squad without much trouble. Inflammation and Healing carries the inflammatory program itself, including why the swelling an athlete wants gone is part of the repair sequence.

06Soft tissue work

Hands and Needles Move the Sensory Measures First

Manual soft tissue therapy and dry needling change sensory readouts more reliably than they change output. Thirteen randomized trials of trigger point dry needling delivered by physical therapists showed lower pain and higher pressure pain threshold than sham, control or other treatment Gattie 2017. That held from immediately after treatment out to 12 weeks.

The rest of that result deserves the same clarity. At 6 to 12 months dry needling was still favored for pain, and the effect was no longer statistically significant. Function improved against sham and did not improve against other active treatments. Trial quality ran from 4 to 9 on the 10 point PEDro scale with a median of 7, and the overall certainty was rated very low to moderate.

Instrument-assisted work returns the same shape. Pooling 13 randomized trials, instrument-assisted soft tissue mobilization produced large effect sizes for range of motion in uninjured people, and for pain and patient-reported function in injured ones Seffrin 2019. Average method scores were 5.83 and 5.86 out of 10 in the two groups of studies.

One line in that review matters more than the effect sizes. The different instruments used across the studies returned similar effect sizes on the same outcomes. The tool brand is not the active ingredient, which is the first hint that what is being delivered is information rather than a proprietary mechanical event.

What the hands are actually changing

Massage draws the boundary from the other side. Twenty-nine randomized studies and 1,012 participants found no evidence that massage improves strength, jump, sprint, endurance or fatigue, and small statistically significant improvements in flexibility and delayed onset muscle soreness Davis 2020. Sensation and range moved. Power output did not.

Line the three literatures up and the pattern is hard to miss. Pressure pain threshold, range of motion, flexibility, soreness and patient-reported function move. Maximal force, sprint speed and jump height do not. Every technique in this family, Active Release, instrument assisted work such as Graston, transverse friction, ischemic compression and the Nimmo receptor tonus method, is a sensory input applied through the skin and the muscle.

That is the correct reading of what those hands do. They feed precise mechanical input into the receptors of muscle and fascia and change the length and tension relationship the nervous system is working from. The goal is not to hurt tissue but to reorganize it, and the outcomes that move are the outcomes a reorganization would move.

07Tape and stretch

Tape and Stretching Are the Smallest Magnitudes on the Axis

Stretching changes what the nervous system will tolerate before it changes what the tissue will allow. The standard explanation for proprioceptive neuromuscular facilitation, that contracting a stretched muscle triggers Golgi tendon organ inhibition and lets the muscle lengthen, is not supported by the reflex evidence Chalmers 2004.

The review is specific about why. Contraction of a stretched muscle before further stretch does not produce relaxation of that muscle. The inhibition of the stretch reflex that follows such a contraction lasts about one second. The drop in Hoffmann and stretch reflex amplitude after a contraction looks like presynaptic inhibition of the muscle spindle signal rather than tendon organ activation.

The extra range that hold relax and contract relax produce therefore has to come from somewhere else. The review names two candidates: a change in the ability to tolerate stretch, and a change in the viscoelastic properties of the muscle. Both are real. Only one of them is in the tissue.

Duration has been tested directly. Ninety-three adults stretched five days a week for six weeks, and the groups that stretched gained knee extension range over the control group with no differences among themselves Bandy 1997. Thirty seconds bought the full effect. Sixty seconds bought no more, and three sessions a day bought no more than one.

The familiar prescription of three to five reps survives that finding intact, and the case for holding longer does not. Across static holds, hold relax, contract relax and post isometric relaxation, stretching restores the length and tension relationship the nervous system relies on to fire cleanly. Whether a stretching program lowers injury rates is a separate question, and Injury Prevention and Load carries that literature.

Tape talks to the skin, and the skin talks to the cord

Taping and bracing work because the skin is a dense sheet of mechanoreceptors wired straight into the proprioceptive system. Kinesiology tape provides neurosensory feedback and decompresses tissue to manage edema. Rigid McConnell and specific proprioceptive taping limit unwanted motion and cue the joint toward a better position. Bracing serves four jobs: on-field immobilization, functional support, motion specific limitation and directional protection.

Applied over clean dry skin with the joint correctly positioned, tape becomes a constant low level signal to the cord, a steady reminder of where the joint lives in space. It delivers continuous afferent input along the dorsal columns, sharpening joint position sense and feeding the same maps that govern proprioception. The tape is a coach for the nervous system, not a cast.

Tape barely changes range of motion, and that is the point. The trial record is mixed, and Kinesiology Taping reports it in full. Fifty-one of 58 pooled ankle analyses came back null there, and the favorable ones cluster in the sensory outcomes. This is where adjunctive care meets the athlete's central integrative state and readiness, the moment to moment tone that decides how the body answers load.

08Reloading the athlete

The Rehab Ladder Is the Largest Input on the Axis

Rehabilitation is the spine of adjunctive care, the graded reloading that turns a pain free joint into a competitive limb. Every modality above it delivers a few joules, a few newtons or a few milliamps. Loading delivers multiples of body weight, thousands of times, under the athlete's own control. On a single axis of magnitude, nothing else in the room is close.

The ladder is ordered for a reason. Isometric work comes first, building tension at multiple joint angles without motion while the tissue is early in repair. Isotonic loading follows, training concentric acceleration and eccentric deceleration through full range. Isokinetic work adds speed specific resistance late. Plyometrics arrive last, training explosive power through the stretch shortening cycle and the myotatic reflex.

Progression is earned, never assumed. Principles of Rehabilitation carries the loading principles and the tissue timelines that set the pace. Return to Play carries what happens to reinjury rates when an athlete goes back with the criteria unmet.

When the athlete cannot deliver the input themselves

The rungs are not always available. After a knee reconstruction the quadriceps is inhibited, and a voluntary contraction that would carry the first rung cannot be produced at useful intensity. That is the window where neuromuscular electrical stimulation added to standard therapy raised quadriceps strength across six pooled trials at 4 to 12 weeks after surgery Hauger 2018.

Read that as instrument selection rather than as a machine beating an exercise. The stimulator is holding a rung open until the athlete can reach it. Once voluntary drive returns, the larger input is the better one, and the current has no further job.

The axis continues past everything on this page. When conservative care cannot reach a problem, the larger magnitude is the correct one, and the orthopedics lesson Conservative Care vs Surgery carries the surgical comparison trials and their long-term equivalence findings. Delay is its own kind of harm at that end of the scale.

Every rung trains the nervous system as much as the muscle, restoring rate of force development, intermuscular timing, and the reflex loops that protect the joint under speed. Rushed, this ladder produces reinjury. Respected, it rebuilds the control system alongside the tissue, which is why the order of the rungs matters more than the volume inside any one of them.

09Figures removed

Six Claims Taken Off This Page

This page previously gave interferential current a 4000 Hz carrier and a beat frequency of 1 to 150 Hz, with low beats driving endorphin mediated relief and high beats driving enkephalin mediated relief. It also had Russian and biphasic stimulation at 35 to 50 Hz recruiting strong motor contractions to fight edema, spasm and post injury weakness. None of those figures or attributions could be traced to a source, so they are gone. The kilohertz review replaces them Ward 2009.

Four more claims went with them, and none of the four could be sourced. Plyometric volume starting at 25 foot contacts per session. Tendon failing beyond 4 percent strain. Friction massage that breaks down or prevents scar formation across a tendon. Cryotherapy that limits the secondary zone of injury. The reaction phase timeline of three to five days now sits with the pages that own the healing literature.

The explanation for proprioceptive neuromuscular facilitation has been corrected rather than removed, because the technique still produces the range and the reflex account of why does not hold Chalmers 2004. The page also carried a quotation attributed to Dr. Jason Dulberg that was not drawn from anything he said or wrote, and it has been removed. Claims here are sourced to the literature or named as the model's.

10The model's claim

One Axis, Many Magnitudes, and No League Table

Two layers run through this page. The established science is the pooled trial record: the ultrasound null, the laser and phototherapy effects, the interferential split between solo and combined use. It is also the stimulation result after knee surgery, the cold water immersion findings in both directions, and the sensory pattern across hands, needles and tape.

The Unified Model of Tone adds a reading on top of that record. It does not rank these interventions, and it never counsels anyone to decline care they need. It sets them on one axis and asks a single question of each: does the magnitude of this input match what this system, right now, can use?

That question explains the scatter that a league table cannot. Ultrasound delivered at scattered doses into scattered conditions returns a pooled 7.12 mm and an interval crossing zero. Interferential current returns nothing alone and something in company. Cold returns a win on soreness in one week of the season and the loss of a 17 percent gain in fiber area in another.

The prediction this page makes

Run a season of adjunctive care in one squad and record four things at every contact. Pressure pain threshold at the treated site in kilopascals, joint position sense error in degrees, morning RMSSD in milliseconds, and time to return to baseline after a standardized load test. Record the modality used and its dose alongside them.

The model predicts that the athlete's starting values on those four measures will account for more of the change than the modality label does. It predicts that the small informational inputs move them most in the athletes who start furthest from their own baseline. This is a claim about how recovery is organized rather than a claim about what treatment does.

If pressure pain threshold, joint position sense error, RMSSD and time to return to baseline are shown to move together within the same athletes across that season, the unification claim is confirmed.

11The tone reading

Adjunctive Care as Dosing on One Axis

Three foundations of tone show up on this page inside measurements a treatment room already collects.

The other foundations run through the same evidence. Gain is what electrical stimulation supplies to a quadriceps that cannot yet be recruited voluntarily after surgery. Constraint is why 60 seconds of stretch bought nothing that 30 seconds had not already delivered. Coupling is the reason interferential current did nothing alone and something when it arrived with another intervention. Prediction is what tape feeds, a continuous report on where the joint sits before the next landing arrives. Set-point is the tissue temperature cold displaces and the body spends the next hour defending. Oscillation is the carrier itself, since every current on this page is a frequency chosen for what it can reach. The full framework is set out in the Unified Model of Tone.

12Where this sits

How This Page Relates to the Rest of the Library

Seven places this argument continues, each with the claim that earns the link.

13Questions athletes ask

Questions Athletes Ask

14The sources

References

17 primary sources, each linked to its record. Figures quoted on this page were checked against the published abstract.