The study
Chronic ankle instability is not one problem. It is a bundle of sensorimotor deficits that vary from patient to patient: poor dynamic balance, blunted joint position sense, weak concentric strength, reduced functional performance, and, in some, deficits in force sense and eccentric strength. The usual advice, do some balance work, treats all of that as if it were one thing.
This review set out to match the modality to the deficit. It pooled 58 randomised controlled trials, 2,097 people with chronic ankle instability, each trial comparing an exercise intervention against no intervention, and asked which type of exercise actually moves which sensorimotor outcome. Modalities covered balance training, strength training, neuromuscular training, 3D training, stroboscopic training (balance work done with vision intermittently disrupted, usually with strobe glasses) and whole-body vibration. Methodological quality was graded with PEDro and the Cochrane Risk of Bias 2 tool: 28 trials were low risk, 19 unclear, 11 high. It was published open access in the Journal of Foot and Ankle Research.
What they found
The modalities came out with distinct profiles rather than one being uniformly best.
Balance training was the broadest. It improved patient-reported function, dynamic balance, joint position sense, concentric strength and functional performance, the only modality that touched every one of those domains.
Strength training improved patient-reported function, dynamic balance and concentric strength. Neuromuscular and 3D training improved patient-reported function and dynamic balance. Stroboscopic training matched those two and also improved joint position sense. Whole-body vibration moved dynamic balance and nothing else.
Two deficits stood out for having no answer: no modality significantly improved force sense or eccentric strength.
The chart below is the practical output, which modality has evidence for which deficit.
What it means for your practice
Start every chronic ankle instability plan with balance training. It is the one modality with evidence across the whole sensorimotor picture, so it earns its place as the backbone rather than one option among many. If you only had time to program one thing, this is it.
Then layer by the deficit you actually measured. If the patient's problem is joint position sense, balance or stroboscopic training are the two with evidence for it, so strobe glasses over a balance progression are a reasonable step up rather than a gimmick. If concentric strength is the gap, strength training and balance both move it. If you are chasing patient-reported function and dynamic balance, most modalities help, so pick the one the patient will actually do. Vibration is the narrowest tool here, useful for dynamic balance and not much else, so do not lean on it as a standalone program.
Set expectations honestly on the two gaps. Nothing in this review reliably improved force sense or eccentric strength, so if a patient's main deficit sits there, do not promise that a standard exercise block will fix it. Keep progressing eccentric load through your usual programming and treat that domain as unfinished evidence rather than a solved problem.
The change to make this fortnight is small and specific. For your next recurrent-sprain patient, do not default to the same wobble-board progression you give everyone. Test which domain is worst, dynamic balance on a Star Excursion or Y-Balance reach, joint position sense, concentric strength, then choose the modality that has evidence for that domain and build the balance work in underneath it. Re-test the same measure in a few weeks so you and the patient can both see it move.
Bottom line
In chronic ankle instability, balance training is foundational and belongs in every plan. Layer strength, neuromuscular or stroboscopic work according to the specific deficit you measured. Force sense and eccentric strength still have no clear exercise answer, so program and promise accordingly.