Construct validation of the leisure time physical activity questionnaire for people with SCI (LTPAQ-SCI)

Relationships between sport and exercise participation and subjective well-being among adults with physical disabilities: Is participation quality more important than participation quantity?

Sport and exercise participation are associated with small, albeit positive changes in subjective well-being (SWB). Recent theorizing has emphasized the importance of distinguishing between performance aspects (i.e., frequency, intensity, time engaged) and the experiential aspects of sport and exercise participation among people with disabilities. This study assessed the relative contributions of time spent participating in sport and exercise (a performance measure) versus measures of participation experiences, in explaining variance in SWB. Participants were 535 adults with physical disabilities, recruited through a nation-wide survey, who participated in sport (n = 271; 62% male; 44 ± 14 years) or exercise (n = 264; 42% male; 57 ± 14 years). They completed measures of minutes/week of sport or exercise participation, experiential aspects of participation, and SWB (overall life satisfaction, satisfaction with physical, psychological and social life-domains, and positive/negative affect). Hierarchical multiple regression analyses showed minutes/week of sport did not explain significant variance in any SWB measure, but sport participation experiences explained significant variance (9.2%-20.9%) in all SWB measures (p < 0.05). Similarly, minutes/week of exercise explained significant variance only in physical life-domain satisfaction (ΔR2 = 2.6%, p = 0.026), but exercise participation experiences explained significant variance (4.8%-10.7%) in all SWB measures (p < 0.05). Experiences of belonging and mastery were particularly strong, consistent predictors across SWB outcomes. These results suggest participation experiences better explain relationships between sport and exercise participation and SWB than time spent performing sport and exercise. Findings have implications for designing future studies to test the effects of sport and exercise on SWB, and developing theories and interventions to explain and maximize the use of sport and exercise to improve SWB in adults with disabilities.

Baseline Comparison of Exercisers and Nonexercisers With Spinal Cord Injury Enrolled in a Group Tele-Exercise Program

Background

Individuals with SCI are 1.5 times more likely to be sedentary compared to adults without disabilities or chronic health conditions. It is therefore imperative to develop and evaluate innovative facilitation strategies for physical activity behavior in this population.

Objectives

As an insightful step to creating and evaluating tailored physical activity interventions for individuals with SCI, we evaluated demographic, psychosocial, and physical characteristics of those who choose to engage in physical activity by enrolling in a group exercise study.

Design/Methods

We conducted a cross-sectional analysis detailing demographic features and baseline outcomes of those with SCI enrolled in a group tele-exercise study who were classified as regular exercisers versus nonregular exercisers per the American College of Sports Medicine exercise guidelines. Between-group differences for psychosocial and physical outcomes were assessed with chi-square and Mann-Whitney U tests (p < .05).

Results

Twenty-seven adult volunteers enrolled in the study (exercisers = 14, nonexercisers = 13). Groups were comparable for biological sex, gender identity, self-reported racial group(s), and current age. Exercisers demonstrated significantly shorter duration of injury compared to nonexercisers (p = .012). Exercisers exhibited significantly higher exercise self-efficacy (p = .017) and increased reported weekly minutes in vigorous intensity leisure time physical activity (p = .029).

Conclusion

Nonexercisers with SCI demonstrate increased injury duration and reduced exercise self-efficacy compared to active peers. These factors should be addressed in the design and delivery of SCI-specific physical activity interventions to increase the likelihood of this critical health behavior over time.

Exercise and aerobic capacity in individuals with spinal cord injury: A systematic review with meta-analysis and meta-regression

BACKGROUND

A low level of cardiorespiratory fitness [CRF; defined as peak oxygen uptake ([Formula: see text]O2peak) or peak power output (PPO)] is a widely reported consequence of spinal cord injury (SCI) and a major risk factor associated with chronic disease. However, CRF can be modified by exercise. This systematic review with meta-analysis and meta-regression aimed to assess whether certain SCI characteristics and/or specific exercise considerations are moderators of changes in CRF.

METHODS AND FINDINGS

Databases (MEDLINE, EMBASE, CENTRAL, and Web of Science) were searched from inception to March 2023. A primary meta-analysis was conducted including randomised controlled trials (RCTs; exercise interventions lasting >2 weeks relative to control groups). A secondary meta-analysis pooled independent exercise interventions >2 weeks from longitudinal pre-post and RCT studies to explore whether subgroup differences in injury characteristics and/or exercise intervention parameters explained CRF changes. Further analyses included cohort, cross-sectional, and observational study designs. Outcome measures of interest were absolute (A[Formula: see text]O2peak) or relative [Formula: see text]O2peak (R[Formula: see text]O2peak), and/or PPO. Bias/quality was assessed via The Cochrane Risk of Bias 2 and the National Institute of Health Quality Assessment Tools. Certainty of the evidence was assessed using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. Random effects models were used in all meta-analyses and meta-regressions. Of 21,020 identified records, 120 studies comprising 29 RCTs, 67 pre-post studies, 11 cohort, 7 cross-sectional, and 6 observational studies were included. The primary meta-analysis revealed significant improvements in A[Formula: see text]O2peak [0.16 (0.07, 0.25) L/min], R[Formula: see text]O2peak [2.9 (1.8, 3.9) mL/kg/min], and PPO [9 (5, 14) W] with exercise, relative to controls (p < 0.001). Ninety-six studies (117 independent exercise interventions comprising 1,331 adults with SCI) were included in the secondary, pooled meta-analysis which demonstrated significant increases in A[Formula: see text]O2peak [0.22 (0.17, 0.26) L/min], R[Formula: see text]O2peak [2.8 (2.2, 3.3) mL/kg/min], and PPO [11 (9, 13) W] (p < 0.001) following exercise interventions. There were subgroup differences for R[Formula: see text]O2peak based on exercise modality (p = 0.002) and intervention length (p = 0.01), but there were no differences for A[Formula: see text]O2peak. There were subgroup differences (p ≤ 0.018) for PPO based on time since injury, neurological level of injury, exercise modality, and frequency. The meta-regression found that studies with a higher mean age of participants were associated with smaller changes in A[Formula: see text]O2peak and R[Formula: see text]O2peak (p < 0.10). GRADE indicated a moderate level of certainty in the estimated effect for R[Formula: see text]O2peak, but low levels for A[Formula: see text]O2peak and PPO. This review may be limited by the small number of RCTs, which prevented a subgroup analysis within this specific study design.

CONCLUSIONS

Our primary meta-analysis confirms that performing exercise >2 weeks results in significant improvements to A[Formula: see text]O2peak, R[Formula: see text]O2peak, and PPO in individuals with SCI. The pooled meta-analysis subgroup comparisons identified that exercise interventions lasting up to 12 weeks yield the greatest change in R[Formula: see text]O2peak. Upper-body aerobic exercise and resistance training also appear the most effective at improving R[Formula: see text]O2peak and PPO. Furthermore, acutely injured, individuals with paraplegia, exercising for ≥3 sessions/week will likely experience the greatest change in PPO. Ageing seemingly diminishes the adaptive CRF responses to exercise training in individuals with SCI.

REGISTRATION

PROSPERO: CRD42018104342.

The effects of active upper-limb versus passive lower-limb exercise on quality of life among individuals with motor-complete spinal cord injury

STUDY DESIGN

Multi-centre randomized clinical trial.

OBJECTIVES

(1) compare the effects of arm-cycle ergometry (ACET) and body weight supported treadmill training (BWSTT) on quality of life (QOL) and intermediary variables in individuals with spinal cord injury (SCI); (2) examine correlations between baseline measures, and changes in physical activity, QOL, and intermediaries.

SETTING

Hospital-based research institutes (Vancouver, Toronto) and University-based exercise program (Hamilton).

METHODS

35 participants with motor-complete SCI above T6 completed baseline assessments of physical activity, life satisfaction, independence, autonomy, positive and negative affect, and pain. Twenty-eight participants were randomized to 72 sessions of ACET (n = 14) or BWSTT (n = 14) with measures repeated following 36 sessions, 72 sessions, and 6-months post-intervention.

RESULTS

Neither intervention significantly impacted QOL. Pain was reduced in ACET compared to BWSTT (interaction effect p = 0.022) and was significantly less at 72 sessions vs. baseline in the ACET group (p = 0.009). At baseline, QOL was positively correlated with independence, autonomy, and positive affect and negatively correlated with negative affect (all p < 0.05). Following BWSTT, changes in moderate-vigorous physical activity correlated with changes in QOL (r = 0.87, p = 0.010). Following ACET, changes in autonomy and independence were positively correlated with changes in QOL (both r > 0.64, p < 0.048).

CONCLUSIONS

Contrary to previous studies, there was no benefit of either intervention on measures of QOL. The social context of exercise may be important for improving QOL. However, individuals may benefit more from active (ACET) than passive (BWSTT) exercise modalities through reduced pain. Exercise interventions that improve autonomy and independence may lead to improvements in QOL.

Temporal Changes of Cardiac Structure, Function, and Mechanics During Sub-acute Cervical and Thoracolumbar Spinal Cord Injury in Humans: A Case-Series

Individuals with cervical spinal cord injury (SCI) experience deleterious changes in cardiac structure and function. However, knowledge on when cardiac alterations occur and whether this is dependent upon neurological level of injury remains to be determined. Transthoracic echocardiography was used to assess left ventricular structure, function, and mechanics in 10 male individuals (median age 34 years, lower and upper quartiles 32–50) with cervical (n = 5, c-SCI) or thoracolumbar (n = 5, tl-SCI) motor-complete SCI at 3- and 6-months post-injury. Compared to the 3-month assessment, individuals with c-SCI displayed structural, functional, and mechanical changes during the 6-month assessment, including significant reductions in end diastolic volume [121 mL (104–139) vs. 101 mL (99–133), P = 0.043], stroke volume [75 mL (61–85) vs. 60 mL (58–80), P = 0.042], myocardial contractile velocity (S') [0.11 m/s (0.10–0.13) vs. 0.09 m/s (0.08–0.10), P = 0.043], and peak diastolic longitudinal strain rate [1.29°/s (1.23–1.34) vs. 1.07°/s (0.95–1.15), P = 0.043], and increased early diastolic filling over early myocardial relaxation velocity (E/E') ratio [5.64 (4.71–7.72) vs. 7.48 (6.42–8.42), P = 0.043]. These indices did not significantly change in individuals with tl-SCI between time points. Ejection fraction was different between individuals with c-SCI and tl-SCI at 3 [61% (57–63) vs. 54% (52–55), P &lt; 0.01] and 6 months [58% (57–62) vs. 55% (52–56), P &lt; 0.01], though values were considered normal. These results demonstrate that individuals with c-SCI exhibit significant reductions in cardiac function from 3 to 6 months post-injury, whereas individuals with tl-SCI do not, suggesting the need for early rehabilitation to minimize cardiac consequences in this specific population.

Implementation of the spinal cord injury exercise guidelines in the hospital and community settings: Protocol for a type II hybrid trial

STUDY DESIGN

Type II hybrid effectiveness-implementation trial protocol.

OBJECTIVES

To (1) evaluate the implementation of coordinated physical activity (PA) coaching delivered by physiotherapists and spinal cord injury (SCI) peers during the transition from in-hospital care to living in a community (implementation objective) and (2) assess the effect of coaching on PA behaviour and psychosocial predictors among people with SCI (effectiveness objective).

SETTING

Rehabilitation hospital and home/community settings in British Columbia, Canada.

METHODS

Implementation objective: PA coaches (physiotherapists and SCI peers) receive an implementation intervention including training, monitoring, feedback, and champion support. A Theoretical Domains Framework-based questionnaire is collected at baseline, post-training, 2, and 6 months follow-up and semi-structured interviews conducted at 6 months. Effectiveness objective: Using a quasi-experimental design, 55 adults with SCI are allocated to intervention (PA coaching, n = 30) or control (usual care, n = 25) groups. Participants in the intervention group are referred by physiotherapists to receive 11 SCI peer-delivered PA coaching sessions in the community. Control participants received usual care. Questionnaires assessing PA behaviour and psychosocial predictors are administered at baseline, 2-months, 6-months, and 1-year. Semi-structured interviews are conducted to assess intervention satisfaction at 6 months. Analyses include one-way (implementation objective) and two-way (effectiveness objective) repeated measures ANCOVAs for questionnaire-reported outcomes and thematic content analysis for interview data. Data are summarised using the reach effectiveness adoption implementation maintenance (RE-AIM) framework.

ETHICS AND DISSEMINATION

The University of British Columbia Clinical Research Ethics Board approved the protocol (#H19-02694), clinicaltrials.gov registration NCT04493606. Documentation of the adoption process will inform implementation in future sites.

Measurement Performance of Activity Measurements with Newer Generation of Apple Watch in Wheelchair Users with Spinal Cord Injury

Background  The level of physical activity (PA) of people with spinal cord injury (SCI) has an impact on long-term complications. Currently, PA is mostly assessed by interviews. Wearable activity trackers are promising tools to objectively measure PA under everyday conditions. The only off-the-shelf, wearable activity tracker with specific measures for wheelchair users is the Apple Watch.

Objectives  This study analyzes the measurement performance of Apple Watch Series 4 for wheelchair users and compares it with an earlier generation of the device.

Methods  Fifteen participants with subacute SCI during their first in-patient phase followed a test course using their wheelchair. The number of wheelchair pushes was counted manually by visual inspection and with the Apple Watch. Difference between the Apple Watch and the rater was analyzed with mean absolute percent error (MAPE) and a Bland–Altman plot. To compare the measurement error of Series 4 and an older generation of the device a t -test was calculated using data for Series 1 from a former study.

Results  The average of differences was 12.33 pushes ( n  = 15), whereas participants pushed the wheelchair 138.4 times on average (range 86–271 pushes). The range of difference and the Bland–Altman plot indicate an overestimation by Apple Watch. MAPE is 9.20% and the t -test, testing for an effect of Series 4 on the percentage of error compared with Series 1, was significant with p  < 0.05.

Conclusion  Series 4 shows a significant improvement in measurement performance compared with Series 1. Series 4 can be considered as a promising data source to capture the number of wheelchair pushes on even grounds. Future research should analyze the long-term measurement performance during everyday conditions of Series 4.

Associations between left ventricular structure and function with cardiorespiratory fitness and body composition in individuals with cervical and upper thoracic spinal cord injury

Study design

Cross-sectional.

Objective

It is known that left ventricular mass (LVM) and cardiorespiratory fitness (CRF) are associated to fat-free mass (FFM).  It is unknown if these factors associated with left ventricular (LV) structure and function outcomes in individuals with spinal cord injury (SCI).

Setting

University-based laboratory.Vancouver, BC, Canada.

Methods

Thirty-two individuals (aged 40 ± 11 years) with chronic, motor-complete SCI between the fourth cervical and sixth thoracic levels were recruited. Echocardiographic LV parameters and body composition were assessed at rest, as per the recommended guidelines for each technique. CRF was assessed during an incremental arm-cycle exercise test until volitional fatigue. The appropriate bivariate correlation coefficients [i.e., Pearson’s (r) and Spearman’s rank (R_s)] tests were used for normal and non-normal distributed variables, respectively.

Results

LV structure and function parameters were not associated with the indexed peak oxygen consumption (V̇O_2peak) [i.e., relative to body weight or FFM] (R_s values ranged from −0.168 to 0.134, all P values > 0.223). The association between peak oxygen pulse and the resting echocardiographic-obtained SV was medium sized (R_s = 0.331, P = 0.069). The LVM associations with FFM and fat mass (FM) were large and small (r = 0.614, P < 0.001 and r = 0.266, P = 0.141, respectively). Associations of absolute V̇O_2peak were medium- positive with FFM (R_s = 0.414, P = 0.021) but negative with FM (R_s = −0.332, P = 0.068).

Conclusion

LV parameters measured at rest are not associated with V̇O_2peak in individuals with cervical and upper-thoracic SCI. Given the observed associations between LVM and V̇O_2peak with FFM, future studies may consider utilizing FFM for indexing cardiovascular measures following SCI.