- •High-intensity training is a safe and feasible modality for people with MS.
- •Adults with MS may achieve walking improvements through high-intensity training.
- •Evidence of high-intensity training on balance outcomes remains inconclusive.
- •Inconsistent dosing of high-intensity training hinders optimal prescription in MS.
There is growing interest and evidence for high intensity training (HIT) in clinical populations, including persons with multiple sclerosis (MS). While HIT has been shown to be a safe modality in this group, it is still unclear what collective knowledge exists for HIT on functional outcomes. This study examined HIT modalities (e.g., aerobic, resistance, functional training) on functional outcomes such as walking, balance, postural control, and mobility in persons with MS.
High intensity training studies, including RCTs and non-RCTs, that targeted functional outcomes in persons with MS were included in the review. A literature search was conducted in MEDLINE, EMBASE, PsycINFO, SPORTSDiscus, and CINAHL in April 2022. Other literature search methods were performed via website and citation searching. The methodological quality of included studies was assessed by TESTEX for RCTs and ROBINS-I for non-RCTs. This review synthesized the following data: study design and characteristics, participant characteristics, intervention characteristics, outcome measures, and effect sizes.
Thirteen studies (6 RCTs and 7 non-RCTs) were included in the systematic review. The included participants (N = 375) had varying functional levels (EDSS range: 0–6.5) and phenotypes (relapsing remitting, secondary progressive, primary progressive). HIT modalities involving high intensity aerobic training (n = 4), high intensity resistance training (n = 7), and high intensity functional training (n = 2), revealed a significant and consistent benefit on walking speed and walking endurance in response to HIT, while the evidence regarding balance and mobility improvement was less clear.
Persons with MS can successfully tolerate and adhere to HIT. While HIT appears to be an effective modality for improving some functional outcomes, the heterogeneous testing protocols, HIT modalities, and exercise doses among the studies preclude any conclusive evidence for its effectiveness thus necessitating future inquiry.
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Published online: May 05, 2023
Accepted: May 4, 2023
Received in revised form: April 23, 2023
Received: December 23, 2022
The authors do not have any relevant financial disclosures.
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