Which exercises do researchers suggest for people with SCI?
Authors of summary: Sarah Ellman (Swiss Paraplegic Research)
Original article: Tweedy SM, Beckman EM, Geraghty TJ, Theisen D, Perret C, Harvey LA, et al. Exercise and sports science Australia (ESSA) position statement on exercise and spinal cord injury. Journal of Science and Medicine in Sport. 2017;20(2):108–15.
The organization Exercise and sports science Australia (ESSA) published evidence-based recommendations for the development of safe and effective exercise programs for adults with chronic SCI.
More than 2 million people worldwide live with a spinal cord injury (SCI). It is most commonly prevalent in males aged 18-32, people over the age of 65, and in developed countries with aging populations. SCI affects functioning at the level of body systems (e.g., cardiovascular and respiratory systems), person (e.g., walking and lifting), and society (e.g., employment and sports participation).
Unfortunately, evidence indicates that many people with SCI are profoundly inactive. This inactivity increases their risk of preventable diseases. Doing regular exercise reduces the risk and can enhance functional independence and participation in daily activities. But how much exercise is actually effective?
What was the aim of the study?
ESSA published a so-called position statement. Its goal was to provide health professionals with evidence-based recommendations to develop safe and effective exercise programs for adults with chronic SCI (i.e., at least six months after the injury).
The statement focuses on exercise for people who use hand-rim propelled wheelchairs. Much of the information provided is also relevant to people with SCI who have more severe activity limitations (who use a power wheelchair) as well as less severe (who are able to walk). The focus is on exercise using voluntary active muscles rather than assistive technology (such as body weight supported treadmill training or functional electrical stimulation).
How did the researchers proceed?
The researchers conducted a so-called literature review: out of many published scientific articles, they collected evidence supporting recommendations for exercise programs for people with SCI. In detail, their recommendations for strength exercises were consistent with those by the World Health Organization for the general population and with one SCI-specific guideline. Recommendations for flexibility exercises were based on two SCI-specific publications and studies on the general population.
What did the researchers discover?
The researchers state that the following points should be considered when developing exercise programs for people with SCI:
- Motor, sensory, and autonomic effects of SCI:
When injuries are complete, functioning is generally predictable, increasing with lower lesion level of injury. However, when injuries are incomplete, functioning cannot be predicted, even when the lesion level is identical. In addition to the effects of lesion level and lesion completeness, the functioning of a person with SCI is also affected by age, physical activity level, and comorbidities such as spasticity, contracture, and pain.
- Exercise capacity of SCI:
Many people with SCI are unable to engage in lower-limb exercises and must use upper-limb such as wheelchair pushing and arm-crank. Unfortunately, upper-limb exercise produces a considerably lower cardiovascular response compared to lower-limb. Besides, in tetraplegia reduced muscle mass and decreased respiratory function significantly reduces exercise capacity compared with paraplegia.
- Benefits of exercise:
Two benefits of exercise for people with SCI are improved cardiorespiratory fitness and muscular strength. Moreover, performing regularly aerobic exercise enhances: physical functioning and functional independence; activities of daily living; bone health; mental health; and the risk of cardiometabolic diseases decreases.
The rate of depression along people with SCI is four times that of the general population and health-related quality of life is significantly lower. Exercise interventions can decrease depression and increase quality of life in people with SCI.
- Exercise guidelines:
The risk of morbidity and mortality is likely to be significantly higher in people with SCI who complete only 40 minutes per week of moderate intensity aerobic activity (as recommended in other guidelines) compared to those who complete 150 minutes per week (as recommended in this position statement – see table below). With 150 minutes, the risk is much closer to the level of risk considered acceptable for the general population. In detail, the recommendations are:
≥ 30 minutes of moderate exercise intensity aerobic exercise on ≥ 5 days per week
≥ 20 minutes of vigorous intensity aerobic exercise on ≥ 3 days per week
≥ 2 days per week including scapula stabilizers and posterior shoulder girdle
≥ 2 days per week flexibility training including shoulder rotators
What do these findings mean?
When providing exercise guidelines for people with SCI, practitioners should also consider aspects like SCI etiology, time since injury, muscular paralysis, tenodesis grip, autonomic dysreflexia, orthostatic hypotension, thermoregulatory function, sensory impairment, and spasticity. By initial screening for these aspects the safety and effectiveness of exercise programs can be enhanced.
The recommended exercise guidelines may be aspirational for inactive people with SCI. Therefore, practitioners should stratify individuals into “beginning”, “intermediate”, and “advanced”. Tailoring programs accordingly will help them to apply recommendations appropriately in clinic practice.
Who conducted the study?
The scientific article was an official position statement by the organization Exercise & Sports Science Australia, located in Ascot in Queensland. The main researchers contributing were from the University of Queensland in Australia and KU Leuven in Belgium. One of the researchers was from the Swiss Paraplegic Centre in Nottwil, Switzerland.