Dysphagia Knowledge Hub — 吞嚥困難知識庫

Tongue Strengthening Exercises for Dysphagia — Evidence-Based Protocols and Devices

Tongue weakness is one of the most common — and most treatable — components of oropharyngeal dysphagia in older adults. The tongue is a voluntary muscle that follows the same principles as any other skeletal muscle: it can weaken with disuse, age, neurological disease, and radiation; and it can be strengthened with targeted, progressive, overload training. For patients with dysphagia driven partially or primarily by tongue weakness, tongue strengthening is one of the best-evidenced rehabilitation interventions in the entire dysphagia therapy toolbox.

This article walks through why tongue strength matters for swallowing, how to assess it, the main exercise protocols used in speech-language pathology practice, the devices available (IOPI, MOST, TheraBite and related tools), dosing principles from the published RCT literature, and how a realistic home programme looks under SLP supervision. It is written for caregivers, SLPs, rehabilitation clinicians, and family members of dysphagic patients who want to understand what modern tongue rehabilitation actually involves.

Why tongue strength matters for swallowing

The tongue is the primary force generator of the oral phase of swallowing. It performs at least five distinct mechanical functions during a normal swallow:

Bolus collection — the tongue tip and blades gather food particles and saliva into a cohesive bolus on the mid-dorsum
Bolus containment — the tongue forms a seal against the hard palate to prevent premature leakage into the pharynx
Bolus propulsion — the tongue presses sequentially against the hard palate from anterior to posterior, driving the bolus backward with force
Pharyngeal transfer — the tongue base retracts to meet the posterior pharyngeal wall, generating the pressure that moves the bolus through the pharynx
Airway protection — coordination with base-of-tongue retraction and laryngeal elevation protects the airway

When any of these functions is weak, swallowing efficiency drops. Specific problems include:

Pooling in the mouth — bolus sits on the tongue, not moving back
Residue on the palate or in the cheeks — weak tongue cannot clear
Premature spillage into the pharynx before the swallow is ready — increases aspiration risk
Residue in the valleculae and pyriform sinuses — from weak tongue-base retraction
Fatigue with long meals — each swallow requires more effort, so mealtime duration increases and intake decreases

Normal maximum isometric tongue pressure, measured with a tongue pressure device, ranges from 40 to 80 kilopascals (kPa) in healthy adults. Values below 20 kPa are strongly associated with increased aspiration risk in most populations, and this threshold is used as a clinical marker for “tongue weakness requiring intervention.”

Who benefits from tongue strengthening

Tongue strengthening is evidence-supported for:

Post-stroke dysphagia (both acute and chronic) — strong evidence
Head and neck cancer patients post-surgery or radiation — moderate evidence
Parkinson’s disease dysphagia — moderate evidence
Age-related sarcopenic dysphagia — growing evidence
Presbyphagia (normal age-related swallowing changes in otherwise healthy elders) — preventive evidence

Tongue strengthening is not the primary intervention for:

Pharyngeal-dominant dysphagia (where the problem is pharyngeal contraction, not tongue drive) — other exercises apply
Cricopharyngeal dysfunction — addressed with Shaker exercise or surgery
Oesophageal dysphagia — structural or motility problem, not tongue-related
Advanced ALS or progressive neuromuscular disease where strength training has limited benefit

An assessment by a speech-language pathologist with videofluoroscopy or FEES (flexible endoscopic evaluation of swallowing) is needed to determine which component of the swallow is weakest.

The main exercise protocols

Description: With each swallow, the patient is instructed to swallow as hard as possible, squeezing all oral and pharyngeal muscles aggressively. The effort increases tongue pressure, base-of-tongue retraction, and hyoid elevation.

Dosing: Typically 5–10 swallows per set, 3 sets per session, 3 sessions per day.

Evidence: Multiple studies show increased tongue pressure and reduced post-swallow residue after 2–4 weeks of effortful swallow training. It is one of the most widely used exercises in SLP practice.

Use case: Best for patients with mild-to-moderate weakness who can follow instructions reliably and have adequate cognition.

2. Masako maneuver (tongue-hold swallow)

Description: The patient gently holds the tongue tip between the front teeth (about 1 cm protruded) and swallows. This prevents normal tongue movement and forces the pharyngeal wall to work harder, strengthening the posterior pharyngeal wall-tongue base coupling.

Dosing: 10 swallows per set, 3 sets per day.

Evidence: Effective for patients with reduced base-of-tongue retraction, particularly post-stroke and post-HNC. Some studies show increased pharyngeal wall contraction within 2 weeks.

Cautions:

Do not use with food or liquid — only dry swallows
Do not use in patients with known vallecular or pyriform residue (can worsen)
Start with short tongue protrusions and increase gradually

3. Tongue-palate press (IOPI-guided)

Description: Using a tongue pressure device like IOPI (Iowa Oral Performance Instrument), the patient presses the tongue against a small bulb against the hard palate as hard as possible, holding the squeeze for 2–3 seconds.

Dosing: 10 repetitions per set, 3 sets per session, 3 sessions per day, 5 days per week. Progressive overload — the target pressure is set at ~60–80% of the patient’s maximum pressure, and increased weekly as strength improves.

Evidence: The most rigorously studied tongue strengthening exercise. Robbins et al. (2007) in a landmark RCT showed 8-week IOPI protocol increased tongue pressure by ~30% in post-stroke dysphagic patients and improved swallow safety.

Cost: IOPI devices cost US$1,500–2,500 for clinical use; home-use devices (Madison Oral Strengthening Therapeutic, or MOST) are US$300–500.

4. Shaker exercise (head lift)

Description: Lying flat, the patient lifts the head (without lifting shoulders) to look at the toes, holds for 60 seconds, then rests for 60 seconds. Repeated 3 times. Then 30 fast repetitions of the head-lift.

Dosing: 3 sustained holds + 30 fast reps, 3 times per day, 6 weeks.

Target: This is primarily a suprahyoid muscle strengthening exercise (the muscles that lift the hyoid bone during swallowing), not a pure tongue exercise, but it improves hyoid elevation and upper oesophageal sphincter opening, indirectly benefiting bolus transit.

Evidence: Shaker original RCT showed reduced aspiration in stroke patients. Practical limitation: many elderly patients cannot perform the neck-lifting protocol due to neck pain or weakness. Chin Tuck Against Resistance (CTAR) is a popular alternative.

5. Chin Tuck Against Resistance (CTAR)

Description: A modified version of Shaker using a ball or flexible rubber ring placed under the chin against the chest, the patient presses the chin down against resistance.

Dosing: Similar to Shaker — 3 sustained holds (60 sec) + 30 fast reps, 3 times/day.

Evidence: Similar effects to Shaker with better tolerability. Several RCTs show improved swallowing function after 6 weeks.

Use case: Elderly or frail patients who cannot lie flat or perform head lifts.

6. Expiratory Muscle Strength Training (EMST)

Description: Using a device like EMST-150, the patient blows against a calibrated resistance valve set at 70–75% of maximum expiratory pressure. 25 breaths, 5 days per week, 5 weeks.

Target: Not direct tongue strengthening, but closely related — EMST improves suprahyoid muscle activity during swallowing and has been shown to improve swallowing safety in Parkinson’s disease.

Evidence: EMST has one of the most consistent evidence bases in dysphagia rehabilitation for Parkinson’s disease, with multiple RCTs showing reduced aspiration and improved cough function.

Cost: EMST devices cost US$30–60 — among the cheapest effective dysphagia training tools.

Principles of effective strength training

Regardless of which specific protocol is used, effective tongue strength training follows the same principles as any skeletal muscle training:

1. Progressive overload

The muscle must be challenged at 60–80% of its current maximum to adapt. Training at lower intensities (20–40% of max) does not produce strength gains, only endurance or proprioceptive changes. This is why IOPI-guided protocols (which measure actual pressure) typically outperform non-instrumented exercises — the patient cannot accurately self-judge 70% of max without feedback.

2. Specificity

The tongue adapts to the specific movement trained. A protocol that trains maximum isometric tongue-palate pressure will improve that specific measurement; it may or may not transfer to dynamic swallowing performance. This is why combining targeted strength exercises with functional swallowing practice (real bolus swallows) is essential for meaningful clinical benefit.

3. Frequency and duration

Most evidence-based protocols use 3 sessions per day, 5 days per week, for 4–8 weeks. Shorter or less frequent protocols may not produce measurable changes.

4. Monitoring and progression

Without objective measurement, it is very difficult to know if training is working. IOPI or similar pressure devices allow weekly re-testing of maximum tongue pressure, and the training target is raised as the patient improves. Without this feedback loop, patients commonly plateau at intensities below the threshold needed for adaptation.

5. Rest and recovery

The tongue, like any muscle, needs rest to adapt. Daily training without rest days is not more effective than 5-days-on-2-days-off, and can produce fatigue-related regression.

Devices for tongue strengthening

IOPI (Iowa Oral Performance Instrument)

Cost: US$1,500–2,500 (clinical) or US$800–1,200 (home use)
Function: Measures tongue, lip, and cheek pressure in kilopascals via a disposable air-filled bulb
Use: Clinical SLP practice, inpatient rehabilitation, some home programmes
Pros: Gold-standard measurement, excellent reliability
Cons: Expensive, requires some training to use, bulbs are consumables

Madison Oral Strengthening Therapeutic (MOST)

Cost: US$300–500
Function: Home-use oral strengthening device with adjustable resistance
Use: Home programmes under SLP supervision
Pros: More affordable, easier home use
Cons: Less precise than IOPI

TheraBite

Cost: US$400–700
Function: Primarily for trismus (limited jaw opening) but often used in conjunction with tongue exercises in head and neck cancer patients
Use: Post-HNC rehabilitation

Low-cost alternatives

For patients without access to specialised devices, reasonable alternatives include:

Tongue depressors — for resistance during tongue press exercises (less precise)
Plastic spoons — for tongue-push-against-spoon resistance training
Manual digital pressure — SLP-provided manual resistance
EMST-150 (US$30–60) — cheapest evidence-based dysphagia device, good for Parkinson’s patients

The cheap options cannot replicate IOPI’s precision but can produce meaningful strength gains with proper supervision. For most care-home populations and lower-income contexts, these are the practical choice.

A realistic home programme

A common home programme prescribed by SLPs for older adults with mild-to-moderate tongue weakness:

Week 1–2 (baseline and learning):

Assessment by SLP with tongue pressure measurement
Patient learns effortful swallow and tongue-palate press
2 sessions per day, 5 reps per exercise
Focus on correct technique, not intensity

Week 3–8 (progressive loading):

3 sessions per day, 10 reps per exercise
Progressive increase in effort — target 70% of maximum pressure
Effortful swallow: 10 dry swallows per set, 3 sets
Tongue-palate press: 10 reps per set, 3 sets, target 70% max pressure
Masako maneuver: 10 dry swallows per set, 1–2 sets
Re-measure max pressure every 2 weeks to progress targets

Week 9–12 (maintenance):

Reduce to 2 sessions per day, 10 reps per exercise
Maintain at 70% of current max pressure
Weekly SLP review for technique and progression

Total time commitment: ~15–20 minutes per session, ~45–60 minutes per day. This is higher than most patients expect and compliance is often the biggest barrier. Realistic home programmes typically achieve 3–5 days per week rather than 7, and results scale accordingly.

Measuring progress

Meaningful progress markers:

Maximum isometric tongue pressure (IOPI) — primary strength measure, should increase by 20–50% over 8 weeks
Swallow-related quality of life (SWAL-QOL) questionnaire — patient-reported outcome
Eating Assessment Tool (EAT-10) — screens for dysphagia symptoms
Mealtime duration — shorter meals with less fatigue
Residue on FEES or videofluoroscopy — objective clinical measure
Aspiration events per week (caregiver observation)
Weight and nutritional markers — reflect overall intake improvement

Without some form of objective measurement, “I feel better swallowing” is not a reliable guide to actual strength gains.

When tongue strengthening is not enough

Tongue strengthening is one component of comprehensive dysphagia care, not a standalone solution. If a patient is not making measurable progress after 6–8 weeks of diligent training, escalation is needed:

Re-evaluate the underlying cause (has anything changed?)
Consider additional therapies (EMST, NMES, CTAR)
Add compensatory strategies (chin tuck swallow, head turn, effortful swallow)
Diet texture modification may remain necessary
Consider medical or surgical intervention for structural problems

Cautions

Tongue strengthening exercises can cause temporary fatigue and soreness — this is normal but should not lead to falls, aspiration, or functional decline
In progressive neurological disease (ALS, late-stage PD), exaggerated exercise can paradoxically worsen muscle function — consult a neurologist
Do not start without SLP assessment — many patients who think they have weak tongues actually have other dysphagia causes (sensory, cognitive, oesophageal, xerostomia-driven) that require different interventions
Patients with dementia or significant cognitive impairment often cannot reliably perform structured tongue exercises; passive approaches (diet texture, positioning, oral hygiene) may be more appropriate

Practical conclusion

Tongue strength training is one of the most effective, cheapest, and most universally-applicable rehabilitation interventions for oropharyngeal dysphagia driven by tongue weakness. The core principles are straightforward: progressive overload, 3 sessions per day, 5 days per week, 4–8 weeks, with objective measurement where possible. Devices like IOPI improve precision but are not essential — low-cost alternatives and careful SLP supervision can achieve meaningful gains.

For caregivers and family members supporting a dysphagic patient: do not start a home tongue exercise programme without an initial SLP assessment, because the wrong exercise for the wrong cause can be useless or even harmful. Once a programme is prescribed, the biggest factor in success is consistency — 3 short sessions a day for 6 weeks, with someone reminding and supporting the patient through the protocol. The evidence is strong that patients who complete such programmes make measurable gains; the biggest challenge is keeping compliance over time.

Strength training works. The tongue is not special — it follows the same rules as any other muscle.

This article is part of the Dysphagia Knowledge Hub, a free educational reference on swallowing disorders, dysphagia care, and modified-texture diets. Information here is for education and is not medical advice. For individual clinical questions, consult a speech-language pathologist or physician.