Why Exercise Is Essential in Preventing and Managing Type 2 Diabetes

admin • May 23, 2025

Why Exercise Is Essential in Preventing and Managing Type 2 Diabetes

Type 2 Diabetes is a chronic condition that occurs when the body becomes resistant to insulin or fails to produce enough insulin, leading to elevated blood glucose (sugar) levels. High blood sugar levels can be dangerous for your body and even cause long term damage to your organs. It is largely preventable and manageable through lifestyle modifications, with physical activity playing a central role.


The Power of Movement: What the Research Says

Strong evidence from studies shows that regular physical activity significantly lowers the risk of developing type 2 diabetes. The landmark Diabetes Prevention Program (DPP) study found that lifestyle changes involving diet and exercise reduced the incidence of type 2 diabetes by 58 percent in high-risk individuals. Lifestyle changes outperformed medication like metformin by 27 percent.

Furthermore physical activity can:

·      improve insulin sensitivity,

·      regulate blood glucose levels,

·      support weight management, and

·      enhance cardiovascular health.

These benefits are achieved even in the absence of significant weight loss, highlighting the independent power of exercise.


How Much and What Kind?

The Exercise and Sports Science Australia position statement outlines clear recommendations for adults:

Aerobic exercise: At least 150 minutes per week of moderate intensity (like brisk walking or cycling), or 75 minutes of vigorous intensity.

Resistance training: Two to three sessions per week, targeting all major muscle groups.

A combination of both aerobic and resistance training yields the best outcomes.

Supervised exercise, especially when guided by an Accredited Exercise Physiologist (AEP), is particularly effective. These sessions can be tailored to each individual's health status, preferences, and any coexisting conditions.


What can I do now?

If you have Type 2 Diabetes or think you are at risk of developing it any form of movement above what you are currently doing will help. A daily 10min walk is an achievable starting point for most people. For people who are a bit more advanced trying resistance based exercises such as sitting and standing from a chair or doing push ups against the wall are a good entry point.

Sustainable change requires more than good intentions. Behaviour change strategies such as goal setting, self-monitoring, and patient education are crucial. Regular follow-ups and a supportive environment significantly improve adherence and long-term success. Referral to an AEP for structured, evidence-based support is highly recommended.


Final Thoughts

Exercise is not just a helpful add-on, it is an essential, evidence-backed tool in both the prevention and treatment of type 2 diabetes. Whether you’re at risk or managing the condition, moving more and moving often can transform your health outcomes and quality of life. Health professionals should make exercise a standard part of diabetes care, just like medication and nutrition.

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The HiRIT group progressively worked up to lifting approximately 85% of their one-repetition maximum (1RM) and performed deadlifts, squats, overhead presses, and jumping exercises twice per week using a 5 × 5 format. The control group completed a low-intensity exercise program. Importantly, despite the high loading involved, the HiRIT group did not experience an increased incidence of vertebral fractures over the 8-month intervention period. Participants underwent imaging at both baseline and follow-up, providing evidence that appropriately prescribed heavy resistance training can be performed safely in this population. What does this tell us about the best exercises for spinal osteoporosis? The LIFTMOR trial provides evidence that heavy deadlifts, squats, overhead presses, and impact exercises such as jumping is likely to be safe and effective when properly prescribed and supervised. However, this does not mean that every person with osteoporosis should immediately perform these exact exercises. Every individual has unique limitations, movement capacities, injury histories, and levels of confidence, and this trial excluded women with co-morbidities. It is common for people in their 60s to have co-morbidities, including osteoarthritis, diabetes, or previous muscle injuries. For this reason, exercise programs should be personalised. An Exercise Physiologist (EP) can assess the individual and determine the most appropriate starting point, selecting alternative exercises where necessary while still targeting the same physical qualities. The long-term goal may be to work toward exercises such as deadlifts, squats, overhead presses, and impact loading, but the pathway to these exercises will vary between individuals. The key message from the LIFTMOR trial is that resistance training for some people with spinal osteoporosis can be effective. While the specific exercises performed may differ from person to person, a well-designed, individualised program can progressively build toward higher levels of loading that support bone health and physical function. A Deeper Dive into the LIFTMOR Trial Study Design The trial involved 8 months of supervised HiRIT, consisting of 30-minute sessions performed twice per week. The program included four exercises: the deadlift, overhead press, back squat, and jumping chin-ups. Training intensity was greater than 80–85% of 1RM, performed as 5 sets of 5 repetitions. Sessions were supervised with a maximum of 8 participants. The comparison group completed an unsupervised, low-intensity home-based exercise program. This is a very high-intensity program and may not be achievable or advised for everyone. Participants Participants were postmenopausal women older than 58 years with a T-score of less than -1.0 at the hip or spine. Women were excluded if they had a lower limb joint injury or surgery, a recent fracture (within the previous 12 months), localised back pain, uncontrolled cardiovascular disease, cognitive impairment, hyperparathyroidism, diabetes, immobility, or long-term corticosteroid use. A total of 406 women consented to participate, but only 101 met the inclusion criteria, meaning only 25% were eligible. Fifteen participants dropped out of the trial, with one injury reported in the HiRIT group, identified as a lower back strain. The exclusion of women with co-morbidities is problematic, as it can be expected that many people in their 60s will have other health concerns. The fact that only 25% of women who applied to participate were eligible suggests that this program may only be suitable for a relatively narrow group of women with osteoporosis. Discussion The authors stated that "although we observed no serious adverse events in the LIFTMOR trial, we were not adequately powered to assess safety as an outcome." They also noted that they studied a relatively healthy population and that their findings may not be applicable beyond that population. This raises an important question. If the study was not adequately powered to assess safety as an outcome, can it confidently conclude that the intervention is safe? The study can conclude that the intervention was effective within the population studied, but the strength of any conclusions regarding safety is less clear.  At the same time, there is an inherent risk in any exercise program. While clinicians can attempt to manage factors that may contribute to injury, the ability to completely prevent injury is limited.
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Understanding Tendinopathy Tendinopathy is a condition affecting tendons, often caused by overuse, repetitive strain, or age-related degeneration. It can present as either acute inflammation or chronic tendon degeneration. Common areas affected include the Achilles tendon, gluteal tendon, rotator cuff, patellar tendon, and the elbow, commonly known as tennis or golfer’s elbow. These conditions can lead to discomfort, pain, and movement limitations. What Causes Tendinopathy? Tendinopathy is primarily caused by overload, repetitive motions, or sudden increases in activity intensity, which can lead to changes in tendon tissue. There are several risk factors associated with tendinopathy that can be divided into modifiable and non-modifiable categories. Modifiable Risk Factors Strength Flexibility Biomechanics Metabolic disorders such as diabetes or arthritis Weight Hormonal influences Sleep and stress Non-Modifiable Risk Factors Age-related degeneration Gender Genetics Structural characteristics Previous injuries Drug exposure It is important to recognise the interplay between modifiable and non-modifiable risk factors. A holistic approach focused on managing modifiable factors can help reduce risk and support tendon health. How Is Tendinopathy Diagnosed? Tendinopathy is diagnosed through a combination of clinical assessment and physical examination. A clinical assessment may include: Understanding an individual’s history Reviewing individual signs and symptoms Exercise Physiologists will typically begin with a physical examination, including: Evaluating pain, tenderness, and movement restrictions Inquiring about activity levels, including recent increases in physical load Assessing the presence of other health conditions Typical clinical presentations include: Localised pain Discomfort following a sudden increase in activity Pain aggravated by continuous load, though it may temporarily improve during movement A proportional relationship between load and pain Pain and stiffness in the mornings While imaging may reveal structural changes such as degeneration, it cannot definitively differentiate between a tendon tear and severe tendinopathy. Imaging should not be used as the sole diagnostic tool and is primarily helpful for ruling out other conditions or identifying referred pain from different areas. How Does Exercise Influence Tendinopathy? Exercise is one of the most effective tools for treating and strengthening tendons affected by tendinopathy. Loading the tendon and surrounding muscles through exercise can help with immediate pain reduction and strengthen the muscle-tendon unit. Properly structured exercise programs help to: Stimulate tendon repair Enhance tendon quality and strength Restore overall function What Is the Best Way to Manage Tendinopathy? There are three essential interventions for managing tendinopathy: Implementing an individualised exercise plan to gradually progress exposure to load for better tolerance and function Managing load outside the rehabilitation program Understanding pain, managing risk factors, and learning how to manage exercise load When managing tendinopathy through an exercise rehabilitation program, it is important to consider an individual’s response to physical stress. This is measured through load tolerance. Load tolerance refers to the amount of pain-free force an individual can produce or absorb for a specific movement over a specified period of time while still maintaining control of the movement. Adequate load tolerance includes: Acceptable pain during activity Pain that settles within a day What Is Acceptable Pain? Training within a pain range of 0–4 out of 10 is considered acceptable. Pain rated 5 out of 10 or higher may be problematic. Exercise Recommendations For any exercise rehabilitation program, it is important to gradually and progressively load the tendon and muscle while remaining within acceptable load tolerance parameters. Load response should continue to be monitored throughout the program. Example Exercise Loading Progressions for Patellar Tendinopathy Knee extension Leg press (double then single) Split squat Step up Walking lunges Higher step for step up Jumping and hopping Split jumps Maximal forward hop References Goom, T.S., Malliaras, P., Reiman, M.P. and Purdam, C.R., 2016. Proximal hamstring tendinopathy: clinical aspects of assessment and management. Journal of Orthopaedic & Sports Physical Therapy, 46(6), pp.483–493. Malliaras, P. and O’Neill, S., 2017. Potential risk factors leading to tendinopathy. Apunts. Medicina de l’Esport, 52(194), pp.71–77. Malliaras, P., Cook, J., Purdam, C. and Rio, E., 2015. Patellar tendinopathy: clinical diagnosis, load management, and advice for challenging case presentations. Journal of Orthopaedic & Sports Physical Therapy, 45(11), pp.887–898. Malliaras, P., 2024. Mastering Lower Limb Tendinopathy 5th edition ONLINE.
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