The 2BFit study: is an unsupervised proprioceptive balance board training programme, given in addition to usual care, effective in preventing ankle sprain recurrences? Design of a Randomized Controlled Trial

Table 3 Exercise difficulty levels

Exc	Difficulty level	Exc	Difficulty level
A	1. on even surface	E	1. on even surface; with handhold
	2. on even surface; eyes shut		2. on even surface; without handhold
	3. on balance board		3. on even surface; eyes shut and without handhold
B	1. on high surface; with handhold		4. on balance board
	2. on high surface; without handhold	F	1. on even surface; walking
C	Same 3 levels as exercise A		2. on even surface, jumping
D	Same 3 levels as exercise A

ISSN: 1471-2474