"The hands do not shake at all, so how could it be Parkinson's disease?" This is the first question of many families of people with Parkinson's disease. People commonly see hand tremor as the typical sign of Parkinson's disease, but this fixed impression reflects only part of the picture. Because of this misunderstanding, many patients who have no obvious hand tremor and only slow walking and stiffness all over are overlooked, and diagnosis is put off again and again. From the exercise (physiotherapy) side, this article sets out the clinical criteria for diagnosis, the features of the three motor symptoms, why about one in five patients never has hand tremor in the whole course of the disease, and what exercise therapy focuses on for each symptom.
The professional position first: disease diagnosis, subtype classification and prescribing belong to neurology, and this page makes no diagnosis. It only gives education on telling symptoms apart and information on where to seek help. Nova Health's role is exercise and physiotherapy after the diagnosis is made, including training gait, relaxing stiff muscles, improving slowness of movement and preventing falls. For a full picture of the four motor symptoms of Parkinson's disease and the stages of its course, go back to Parkinson's symptoms and stages (the L3 overview). This page concentrates on "having no hand tremor", the most common difficulty in telling conditions apart clinically.
The core point of this page: with no hand tremor, it can still be Parkinson's disease.The international MDS diagnostic criteria state that the core symptom required for diagnosing Parkinson's disease is "bradykinesia", plus either "rest tremor" or "muscle rigidity", to meet the diagnostic conditions (Postuma 2015). Put simply, even with no hand tremor at all, a person with bradykinesia and muscle rigidity can still be diagnosed with Parkinson's disease clinically.
The MDS diagnostic criteria for Parkinson's disease
The most direct way to break down the myth that "no hand tremor means all is well" is to look at the authoritative international clinical criteria. The clinical diagnostic criteria published by the International Parkinson and Movement Disorder Society (MDS) in 2015 (Postuma 2015) state clearly that the first prerequisite for diagnosing Parkinson's disease is the presence of parkinsonism, defined as follows.
Bradykinesia is a required feature, together with at least one of rest tremor or muscle rigidity.
In this definition, "tremor" and "rigidity" are conditions where either one is enough. Both need not be present, and neither is indispensable in itself. The core condition that truly cannot be left out is "bradykinesia". By logic, then, a patient who never has any hand tremor at all, but has both bradykinesia and muscle rigidity, fully meets the core definition of Parkinson's disease clinically. Hand tremor is common, but it is by no means the only "admission ticket" to diagnosis.
Why do people often think Parkinson's disease always means hand tremor?Because rest tremor is the easiest for others to see. When the patient rests both hands on the thighs and keeps still, the fingers still keep trembling like "rolling a pill", which is very noticeable. By contrast, symptoms such as "slower movement and a stiff body" are less obvious and easily taken as natural decline with age. Over time, people come to think that Parkinson's disease must come with hand tremor.
The three motor symptoms: bradykinesia, muscle stiffness and tremor
Traditional medicine groups Parkinson's disease into four motor signs (including "postural instability", which mostly appears in the middle and later stages). But if the focus is on early onset and telling symptoms apart, the three most important elements are bradykinesia, muscle stiffness and tremor. Knowing which one is required for diagnosis and which responds best to exercise therapy is the key to understanding the condition.
| Bradykinesia: required | The patient has difficulty starting a movement, and after a few repetitions the size and speed of the movement get smaller and slower. Common examples are handwriting getting smaller and smaller, shorter steps when walking, a face with little expression (masked face), and arms that swing little when walking. This is the symptom that must be present under the MDS diagnostic criteria. It is also the problem that most affects the patient's ability in daily activities, and exercise therapy has the clearest effect on it. |
| Muscle stiffness (rigidity): one of the two alternatives | The patient's muscles stay tight over the long term. When someone else moves the patient's joints, there is a sense of steady (lead-pipe) or catching, step-by-step (cogwheel) resistance. This stiffness usually affects the neck, trunk and limbs. Besides causing pain, it makes the body lean forward. Many patients with no hand tremor mainly have this muscle stiffness. |
| Rest tremor: one of the two alternatives | Shaking is most obvious when the hands and feet are completely relaxed and at rest, and eases when the patient reaches for something or moves on purpose. Hand tremor is the best known, but research (Gupta 2020) shows that about one in five patients never have hand tremor at any time. In addition, the effect of exercise therapy on directly improving hand tremor is also the weakest. |
An important clinical difference: bradykinesia and muscle stiffness often appear slowly.Hand tremor is easy for others to see at a glance and raises alarm. Bradykinesia and muscle stiffness, however, build up gradually. At first the person may feel only that movements are "a bit slow" or that "one shoulder is tighter", and even family members living with the person find it hard to notice at once. Patients with mainly slowness and stiffness are therefore the easiest to overlook.
Akinetic-rigid Parkinson's disease
"Parkinson's disease can occur without hand tremor" is not just medical theory. It is also quite common in the clinical data. A study that specifically counted the prevalence of tremor in people with Parkinson's disease (Gupta 2020) found that about 19.9% of patients never had any form of tremor from onset through to the end of life (no rest, postural or action tremor at all). Even in contemporary cohort data alone, the prevalence of rest tremor was only 58.2% and action tremor 36.6%, so more than four in ten patients have no rest tremor. This disease subtype, with bradykinesia and muscle stiffness as the main features and tremor slight or entirely absent, is known medically as the "akinetic-rigid" type.
Another epidemiological study of the distribution of clinical subtypes of Parkinson's disease (Balestrassi 2020) gives matching support: among 277 patients surveyed, the mixed type made up 77.6%, the akinetic-rigid type 13% and the pure tremor type 5.4%. Adding the atypical presentations together (akinetic-rigid plus pure tremor), the share is about 18.4% in total, quite consistent with the figure of about one in five in Gupta 2020. The akinetic-rigid type is therefore not a rare exception but a group of patients that takes up a considerable share.
How having no hand tremor affects the time to diagnosis
The price of not knowing about "no hand tremor" goes beyond a mistaken idea and leads to real diagnostic delay. A study of the time to diagnosis in Chinese patients with Parkinson's disease (Wan 2019) found that for patients whose illness began with limb stiffness, the median delay from the first symptoms to formal diagnosis was as long as 22 months, while for patients whose illness began with rest tremor the median delay was only 10 months. This means patients whose first symptom was stiffness often took more than twice as long to get a diagnosis.
The same study also found that when the illness started mainly with muscle stiffness, with more non-motor symptoms, and the first consultation was not with a neurology specialist, the time needed for diagnosis was lengthened further. The reason is not hard to see. Older people who have no hand tremor and show only slow movement and stiffness in joints and muscles are easily put down, by those around them or even by the patients themselves, to "ageing", "frozen shoulder", "low mood and lack of energy" or simply "walking slowly". They go from one specialty to another, and valuable time is wasted before the real cause is found. A delayed diagnosis in effect puts off every effective intervention, including drug treatment and exercise rehabilitation.
Even with no hand tremor at all, seeing a neurologist is advised in the following situations:persistent slowing of the hand and leg on one side of the body, handwriting getting smaller and smaller, a blank facial expression, one arm not swinging naturally when walking, needing many small steps to turn, or one side of the body being particularly stiff and tight. Do not wait for "hand tremor" before seeing a doctor, because for patients of the akinetic-rigid type, waiting for tremor to appear can easily delay diagnosis by nearly two years.
How to tell Parkinson's tremor from other kinds of hand tremor
The other side of telling symptoms apart must not be ignored: having hand tremor does not mean having Parkinson's disease. Hand tremor can have many different causes, and the one most often confused with Parkinson's disease is the more common "essential tremor". The two are clinically very different in nature, but to tell them apart accurately and rule out other possible causes with the right tests, a clinical judgement by a neurologist is needed, and conclusions must never be drawn by comparing symptoms from information found online. The table below is meant to show "why a specialist assessment is needed" and not for readers to diagnose themselves.
- Usually most obvious when resting and still, and eases when the person reaches out to do something on purpose.
- Often starts on one side and usually comes with slowness or stiffness.
- Diagnosis and medication are handled by neurology, and the tremor itself responds weakly to exercise therapy.
- Essential tremor is usually obvious during movement, reaching and holding a cup, and is less at rest.
- Usually symmetrical and in both hands, may run in the family and does not necessarily come with slowness or stiffness.
- But it is hard to tell them apart on the surface alone, so a clinical assessment by a neurologist is essential, and people should not match themselves to a category.
The clear position of this page: understanding the symptoms helps raise awareness, but a formal diagnosis must be left to a neurologist. Whether it is "hand tremor that does not look like Parkinson's disease" or "no hand tremor at all but slow walking and stiffness all over", the safest course in both cases is to see a neurology specialistfor a full check. The content of this page only reminds readers which symptoms are worth seeking help for early, and it cannot replace a doctor's formal diagnosis.
How physiotherapy deals with the three motor symptoms
With the symptoms sorted out, we come back to Nova Health's own professional field, exercise therapy. An important clinical fact must be stated honestly first: physiotherapy's effect on the three motor symptoms of Parkinson's disease is not equal. Exercise intervention helps most concretely with bradykinesia, muscle stiffness, balance and gait, while the evidence for directly improving tremor itself is relatively weak. The European physiotherapy guideline for Parkinson's disease (Domingos 2018) also states clearly that physiotherapy effectively improves daily functional activities such as gait, transfers and balance, and advises neurologists to refer patients early to a specialist physiotherapist for follow-up.
- Bradykinesia: the most work goes here
- Physiotherapy uses large-amplitude movement training to help the patient make movements big again, improving the pattern of movements getting smaller and slower the more they are repeated. This is the most central part of exercise therapy.
- Muscle stiffness: directly helped
- The therapist uses stretching, joint movement training, trunk rotation exercises and posture correction to help the patient relax tight muscles, reduce the forward lean and pain, and keep the range of movement of the joints.
- Balance and gait: the core of fall prevention
- Training combines balance exercises and gait adjustment, uses visual or auditory cues to deal with freezing of gait, and also assesses the home environment to prevent falls.
- Tremor: the weakest evidence
- Exercise cannot make hand tremor disappear completely, and tremor is controlled mainly by medication or surgery. Physiotherapy mainly teaches the patient relaxation techniques, helps improve concentration and adjusts how movements are done, to reduce the effect of tremor on daily life.
This clinical division of work is in fact a positive messagefor patients of the akinetic-rigid type who have no hand tremor: the problems that trouble this group most (bradykinesia, muscle stiffness, slow walking and unsteady standing) are exactly the areas where exercise therapy works best. In other words, "no hand tremor" by no means means "nothing can be done". On the contrary, these akinetic-rigid patients often gain more from regular exercise rehabilitation.
Clinical evidence on exercise slowing worsening
One of the questions families ask most is whether exercise training can really "slow the worsening of the disease" or can only "maintain the present state". The most substantial single piece of clinical evidence at present comes from the SPARX phase 2 randomised clinical trial (Schenkman 2018). The study recruited people with Parkinson's disease at an early stage who had not yet started medication and divided them into groups for 6 months of exercise training. The result: the UPDRS motor score of the high-intensity treadmill exercise group (heart rate at 80–85% of maximum) stayed roughly level (rising only slightly by about +0.3), while the control group on usual care clearly got worse (score up about +3.2). The moderate-intensity exercise group did not show the same stability.
Broader pooled evidence comes from the 2023 Cochrane network meta-analysis (Ernst 2023). It covered 156 randomised controlled trials and 7,939 people in total and confirmed that many types of exercise help improve overall UPDRS motor symptoms, with dance training having the highest certainty of evidence (MD −10.32, high certainty). Gait, balance and functional training, multi-domain combined training and aquatic therapy also have positive effects, and the benefit of aquatic therapy on quality of life is especially notable (moderate certainty). When it comes to deciding which kind of exercise is absolutely the best, however, the evidence for differences between them is still limited.
How should expectations be set in line with the clinical facts? The SPARX trial suggests that high-intensity exercise may slow the decline of motor symptoms in early-stage patients, but because it was only a phase 2 trial of limited size, larger phase 3 results are still needed for final confirmation, so "slowing progression" remains promising but not conclusive. The one certain thing is that regular exercise is quite safe, genuinely improves mobility and quality of life, and works better the earlier it starts. However, exercise cannot cure Parkinson's disease and cannot replace the usual medication prescribed by the neurologist. Its overall effect is moderate, and the evidence for improving "tremor" itself is the weakest.
Using visual and auditory cues in Hong Kong homes
For patients who are slow and prone to losing balance and falling (especially the akinetic-rigid type), "freezing of gait", in which the feet suddenly feel glued to the floor and the patient cannot step, is one of the problems that most interferes with daily life and carries the highest fall risk, and medication alone often cannot remove it completely. In this situation the cueing strategies used in physiotherapy are very useful, and they can be applied directly in the home setting.
- Visual cues: tape or draw lines on the floor at home (each line about one foot-length apart) and teach the patient to "step over the line" when walking. Small safe objects can also be placed on the floor to guide the patient to lift the foot over them.
- Auditory cues: use a metronome or play music with a clear beat, and ask the patient to step to the steady beat, using rhythm to help the feet keep a suitable step length.
- Attention cues: remind the patient to concentrate and say "big steps, step over the line" in the head when walking. This changes the automatic walking pattern, which is impaired, into one where the brain controls each step deliberately.
- Avoid dual tasks: do not chat or carry too many things in both hands while walking. Distraction easily triggers freezing of gait and raises the risk of falls.
All of these cueing strategies are core interventions set out in the European physiotherapy guideline (Domingos 2018). If the patient freezes frequently and even falls repeatedly because of it, the best approach is to arrange a physiotherapist to visit the home, design a cueing plan individually around the real living environment, guide coping skills on the spot and carry out a full home fall-risk assessment, because the layout, corridor width and furniture placement of every Hong Kong home differ, and only individual adjustment gives the best effect.
When to refer to neurology, and what physiotherapy follows up
In the end, neurology and physiotherapy are not alternatives that replace each other but a division of professional work in which each has its own role. Only when the boundary between the two is clear will patients and families not go to the wrong professional or take wasted journeys.
Left to the neurology specialist (not handled on this page)
- Diagnosing whether the person has Parkinson's disease and which subtype it is
- Examining and ruling out other causes of hand tremor or slow walking
- Deciding when to start medication, choosing suitable drugs and adjusting the dose
- Dealing with fluctuations in drug effect between "on" and "off" periods, and assessing whether surgery is needed
- Routes to see a specialist include the public system (Hospital Authority neurology specialist outpatient clinic) or a private neurology specialist
Handled by physiotherapy and exercise rehabilitation (Nova Health)
- Large-amplitude movement training to help improve slowness of movement and regain movement size
- Easing muscle stiffness through stretching, joint movement training and posture correction
- Strengthening balance and gait training, and teaching cueing techniques for freezing of gait
- Fully assessing fall risk at home and giving advice on modifying the environment
- Setting up a long-term daily exercise programme for the patient and teaching carers living with the patient how to hold and support
The ideal rehabilitation pathway is to be diagnosed by a neurology specialist and have drug treatment settled properly first, and then to add regular exercise and physiotherapy alongside. It is also worth mentioning that a randomised controlled trial published in the leading journal the New England Journal of Medicine found that, compared with resistance training and stretching, tai chi training improved postural stability in people with Parkinson's disease significantly more and effectively reduced the number of falls (Li 2012). This finding is especially relevant for akinetic-rigid patients whose main problems are muscle stiffness and poor balance. As a reminder in the context of local healthcare: diagnosis of the disease and adjusting medication must be left to the neurology specialist. At the same time, there are several Parkinson's patient self-help organisations in Hong Kong that offer a range of exercise suggestions such as walking, tai chi and boxing, and community support resources, which patients and families can use as well.
How home physiotherapy helps patients who are slow and have no hand tremor
The home physiotherapy service provided by Nova Health especially suits the real needs of these patients, whether they walk slowly, find it hard to travel to and from a clinic, or are akinetic-rigid patients who have no marked hand tremor but are stiff all over and prone to losing balance and fallingand who are the most easily overlooked by their families. The physiotherapist goes to the patient's familiar home and retrains daily movements on the spot, for example how to stand up safely from the sofa the patient usually sits on, how to step steadily in the narrow corridor passed every day, and how to go up and down the few steps at the front door safely. This way of training is much closer to real life than practising in a clinic, and it also lets the therapist carry out a home safety and fall-prevention assessment on the spot.
In short: having no hand tremor does not mean the person does not have Parkinson's disease, and it does not mean the condition cannot be improved.Diagnosing the disease and prescribing medicine should be left to the neurology specialist, while improving everyday mobility can rely on exercise and physiotherapy working together. For akinetic-rigid patients who have no hand tremor but slow movement and muscle stiffness, starting rehabilitation training early is very important.